Which Statement is true  

regarding bearings used in

high-powered reciprocating

aircraft engines?

  2015                                                                  R

There is less  < rolling friction

when ball bearings are used

than when roller bearings

are employed.

       2015                                                             R

A condition

that can occur in radial engines

but is unlikely to occur in

horizontally opposed

engines is 

   2015                                                                      R

hydraulic lock. 

     2015                                                                       R

Which condition

would be the

least < likely to be caused by

failed or failing

engine bearings?

    2015                                                                       R 

Low oil temperatures

    2015                                                                        R

What is the

principal advantage of using 

propeller reduction gears?

   2015                                                                      R

To enable the engine

RPM to be increased with an

acompanying increase in 

power and allow the

propeller to  remain at lower, 

                    more efficient RPM.                     

         2015                                                               R

Which of the following

will decrease volumetric efficiency

in a reciprocating engine?

    2015                                                                  R   

Improper valve timing.

Sharp bends in the induction system.

High carburetor air temperatures.

3, 4, and 5.

ISH

   2015                                                                                                                                    R                                                          

Which of the following is a 

characteristic of a

thrust bearing

used in most radial engines?

   2015                                                                         R

Deep-groove ball.  

   2015                                                                       R

Which 

bearing is least < likely

to be a

roller or ball bearing?

   2015                                                                       R

Master rod bearing (radial engine).

  2015                                                                        R

 The operating

temperature valve

clearance of a

radial engine as

compared to

cold vave clearance is

  2015                                                                    R

greater.

 tvc > cvc

  2015                                                                    R

A nine-cylinder engine with a bore of

5.5  inches and a stroke of 6 inches will 

have a total piston displacement of 

  2015                                                                       R

1,283 cubic inches.

  2015                                                                        R

The five events of a four-stroke

cycle engine in the order of their

occurrence are

2015      [image]                                                                                                                 R

intake, compression, ignition, power, exhaust,

Look up

How 4 stroke engine works

Eracing cars and more...     3:47 [image]

2015                                                                                                                         R

The primary concern in

establishing the firing order

for an opposed engine is to 

2015                                                                                                                         R

provide for balance and eliminate vibration to the  greatest > extent possible.

provide > keep

2015                                                                                                                       R

If fuel/air ratio

is proper and ignition timing

is correct,

the combustion process

should be completed

  2015                                                                     R 

just after top center

at the beginning 

of the power storke.

   2015                                                                    R   

Grinding the valves of a

reciprocating engine

to a feather edge is likely to result in

       2015                                                                 R 

preignition and burned valves. 

       2015                                                                 R

Which statement is correct

regarding engine crankshafts?

     2015                                                                     R

Moveable counterweights serve

to reduce the torsional vibrations

in a n aircraft recioprocating engine. 

     2015                                                                     R

On which strokes

are both valves

on a four-stroke cycle

reciprocating aircraft engine open?

     2015 [image]                                                                R 

Exhaust and intake.

  Look up

       COMP Cams® Technology Explained: Cam Timing

by COMP Cams  3:33 [image]

  2015                                                                       R

Master rod bearings

are generally what type? 

2015                                                                 R 

Plain.

(Look at R7. On radial its Roller and Ball.) 

 2015                                                                 R

The actual power

delivered to the

propeller of an

aircraft engine is called

 2015                                                                 R 

brake horsepower. 

(Prop= BH)

 2015                                                                 R

Cam-ground pistons

are installed

in some aircraft engines to

 2015                                                                 R

provide a better

fit at operating

temperatures.

 2015                                                                 R

Using the following information,

determine how many

degrees the crankshaft

will rotate with both

the intake and

exhaust valves seated.

 2015                                                                 R

245º

45º+180º+20º= 245º

 2015                                                                 R

Some aircraft

engine manufactures

equip their product

with choked or taper-ground

cylinders in order to

 2015                                                                 R 

provide a straight

cylinder bore at

operating temperatures.

provide > Flex/ increase 

 2015                                                                R 

An aircraft reciprocating engine using hydraulic valve lifters is observed to have no clearance in its valve operating mechanism after the minimum inlet oil and cylinder head temperatures for takeoff have been reached.

 2015                                                                 R 

During normal

operation. 

 2015                                                                R 

What tool is generally used

to measure the  

crankshaft rotation in degrees?

 2015 [image]                                                                R 

Timing disk

    Magneto to Engine Timing

LETU CASTING  9:00 [image]

 2015                                                                 R 

If an engine with a stroke

of 6 inches is operated at 2,000

 RPM, the piston movement within the cylinder will be

 2015                                                                 R 

at maximum

velocity 90º

after TDC

 2015                                                                 R

If the intake valve is opened too early

in the cycle of operation of a

four-stroke cycle engine, it may result in 

 2015                                                                 R

backfiring

into the

induction system.

 2015                                                                 R

Some cylinder barrels

are hardened by

 2015                                                                R 

nitriding.

 2015                                                                 R

Which statement is correct

regarding a four-stroke

cycle aircraft engine?

 2015  [image]                                                               R 

The intake valve closes

on the compression stroke.

How 4-Stroke Engines Work! (Otto cycle)

Thomas Schwenke    3:09 [image] 

 2015                                                                 R 

On which part of the cylinder

walls of a normally

operating engine will the

 greatest > amount of wear occur?

 2015                                                                 R

Near the top of the cylinder.

TOP >

 2015                                                                 R

During overhaul,

reciprocating engine

exhaust valves

are checked for stretch

 2015                                                                 R

 with a countour or radius gauge.

[image] R Gauge 

 2015                                                                R

When is the fuel/air

mixture ignited in a

conventional reciprocating engine?

 2015                                                                 R

Shortly before the piston

reaches the top

of the compression stroke.

2015                                                                 R

Ignition occurs at 28º BTDC on a certain 

four-stroke cycle engine, and the intake valve opens at 15º  BTDC.

 How many degrees of crankshaft travel after ignition does the intake valve open?
(Consider one cylinder only.) 

 2015                                                                 R 

373º

28º+180º+165º=373º

 2015                                                                 R 

What is the purpose

of the safety circlet

installed on some

valve stems?

 2015                                                                 R

To prevent valves

from falling into

the combustion chamber.

 2015                                                                 R 

Valve overlap

is defined as the

number of degrees

of crankshaft travel

 2015                                                                 R 

during which

both valves

are off their seats.

 2015                                                                 R

The valve clearance

of an engine

using hydraulic lifters,

when the lifters are

completely flat,

or empty, should not exceed

 2015                                                                 R

 a specified amount

above zerØ. 

  NOT BELOW

2015                                                                    R 

If the exhaust valve

of a four-stroke

cycle engine is closed

and the intake valve

is just closed, the piston is on the 

 2015                                                                 R 

Compression stroke.

Intake 2  /

Compression 3 /

I  / P / 1Exhaust closed 

 2015                                                                 R 

How many of the following

are factors in establishing

the maximum compression

ratio limitations of an aircraft engine?

 2015                                                                 R 

Three

Detonation characteristics of the fuel used.

Design limitations of the engeine.

Degree of supercharging.

DDD 

Not Spark plug reach.

 2015                                                  R

Full-floating piston

pins are those

which allow motion

between the pin and

 2015                                                                 R

both the piston and

the small end

of the onnecting rod.

 2015                                                                 R 

The primary purpose

in setting proper

valve timing and overlap is to 

 2015                                                                 R 

obtain the best volumetric efficiency and  lower cylinder operating temperatures.

 2015                                                                 R 

If the hot clearance is

used to set the valves

when the engine is cold,

what will occur during

operation of the engine?

 2015                                                                 R 

The valves will open late and close early.

 LE

 2015                                                                 R 

The purpose of two

or more valve spings

in aircraft engines is to 

 2015                                                                 R 

eliminate valve spring surge.

eliminate > =ize

 2015                                                                 R 

During overhaul,

the disassembled parts

of an engine are usually

degreased with some form

of mineral sprits sovent

rather than water-mixed

degreasers primarily because

 2015                                                                 R 

water-mixed degreaser

residues may cause

engine oil contamination

in the overhauled engine.

 2015                                                                 R 

Why does the smoothness

of operation of an

engine increase with

a greater >number

of cylinders?

 2015                                                                 R 

The power impulses

are spaced

closer together.

 2015                                                                 R 

Compression ratio

is the ratio

between the

 2015                                                                 R 

cylinder volume with

piston at

bottom dead center

and at top dead center.

 2015                                                                 R 

If the crankshaft

runout readings

on the dial indicator

are plus .002 inch

and minus .003,

the runout is 

 2015                                                                 R 

.005 inch.

+.002-.003=.005  positive negitive =add numbers

2015                                                                R

(1) Cast iron piston rings may be used to chrome plated cylinders.

(2)  Chome-plated rings may be used in plain steel cylinders.

2015                                                                 R

both  No. 1 and 2 are true.

 Cast iron

Chome-plated

 2015                                                                 R 

How is proper

end-gap clearance

on new piston rings

assured during the

overhaul of an engine?

 2015                                                                 R

By placing the

rings in the cylinder

and measuring the

end-gap with

a feeler gauge. 

2015                                                                R

The volume of a cylinder

equals 70 cubic inches

when the piston is at

bottom center.When the piston

is at the top of the cylinder,

The volume equals

10 cubic inches.

What is the compresison ratio?

 2015                                                                 R

7:1

 2015                                                                 R

When cleaning aluminum

and magnesium

engine parts, it is

inadvisable to soak

them in slutions

containing soap because

 2015                                                                 R 

some of the soap will

become inpregnated in the

surface of the material

and subseqently cause

engine oil contamination

and foaming.

 2015                                                                 R 

What is the purpose

of a powe® ©heck

on a reciprocating engine?

 2015                                                                 R 

To determine

satisfa©to®y

performance.

 2015                                                                 R

What will be the likely

result if the piston ring

gaps happen to be aligned

when performing a

differtial-pressure

compression check

on a cylinder?

 2015                                                                 R 

A worn

or

defective

ring(s)

indication.

 2015                                                                 R 

Which of the following

will be caused by

excessive valve clearance

of a cylinder on a

reciprocating aircraft engine? 

 2015                                                                 R 

Reduced valve overlap period.   

 2015                                                                 R 

The floating control thermostat,

used on some

reciprocating engine

installations, help regulate

oil temperature by 

 2015                                                                 R

controlling air flow

through the oil cooler.  

 2015                                                                 R

Which of the following

would indicate a general

weak-engine conditon

when operated with a

fixed-pitch propeller

or test club? 

 2015                                                                R

Lower than

normal stastic RPM,

full throttle operation. 

 2015                                                                 R

What is required by

14 CFR Part 43 Appendix D

when perorming an

annual/100-hour inpection

on a reciprocating engine aircraft?  

 2015                                                                 R

Cylinder compression check. 

  2015                                                                 R

After spark plugs

from an opposed engine

have been serviced,

in what position should

they be reinstalled?

 2015                                                                 R

Next in firing order

to the one from which

they were removed

and swapped bottom to top. 

 2015                                                                 R

As the pressure is

applied during a recipropocating

engine compression check

using a differentaial pressure

tester, what would a movement

of the propeller in the direction

of engine roation indicate?

 2015                                                                 R

The piston was

positioned past

top dead center.

  2015                                                                R

Excessive valve

clearance results

in the valves opening 

 2015                                                                R

late and closing early.

LE

 2015                                                                 R

During routine inspection

of a reciprocating engie,

a deposit of small, bright,

metallic particles which

do not cling to the magnetic

drain plug is discovered in the oil

sump and on the surface of the oil filter.

This condition 

 2015                                                                 R

may be a result

of abnormal plain type

bearing wear andis

cause for futher investigation.

may>is

  2015                                                                 R

A characteristic of

dyna-focal engine mounts

as applied to aircraft

reciprocating engines is that the 

 2015                                                                 R

shock mounts

point toward the

engine's center of gravity. 

 2015                                                                 R

If metallic particles

are found in the

oil filter during an inpection, 

 2015                                                                 R

the cause should

be identified and

corrected before

the aircraft is

released for flight.

 2015                                                                 R

If the oil pressure gauge

fluctuates over a

wide range from zero

to normal operating

pressure, the most likely cause is

 2015                                                                 R

low oil supply.

 2015                                                                 R

What special procedure

must be followed

when adjusting the

valves of an engine

equipped with a floating

cam ring? 

 2015                                                                 R

Eliminate cam bearing

clearance when making

valve adjustment. 

Eliminate  > Adjust

  2015                                                                 R

Which of the following

is most likely to occur

if an overhead valve

engine is operated

with inadequate

valve clearances?

 2015                                                                 R

The valves will not seat

positively during start

and engine warm up.

2015                                                                 R

Excessive valve

clearances will cause

the duration of

valve opening to 

 2015                                                                 R

decrease for both intake and exhaust valves.  

   2015                                                                 R

What does valve

overlap promote?  

 2015                                                                 R

Better scavenging

and

cooling characteristics.  

 2015                                                                 R

At what speed

must a crankshaft

turn if each cylinder

of a four-stroke cycle

engine is to be fired

200 times a minute? 

 2015                                                                 R

400RPM

In a four stroke engine, each cylinder fires every other revolution of the crankshaft.

2015                                                                 R

Engine crankshaft

runout is

usually

checked 

 2015                                                                 R

during engine overhaul.

after a”prop strike” or sudden engine stoppage.

 1 and 3

da not dad dda 

 2015                                                                R

Before attempting to

start a radial engine

that has been

shut down for

more than 30 minutes, 

 2015                                                                 R

Turn the  propeller

by hand

three to four

revolutions in the

normal direction

of ration to check for liquid lock. 

  2015                                                                 R

An engine misses

in both the right and left

 positions of the magneto switch.

 The quickest method

for locating the trouble is to   

 2015                                                                 R

Check for one

or more

cold cylinders. 

  2015                                                                 R

A hissing

sound from

the exhaust stacks

when the propeller

is being pulled

through manually indicates 

 2015                                                                 R

Exhaust valve blow-by. 

2015                                                                 R

If the oil pressure

of a cold engine

is higher than

normal operating

temperatures, the

 2015                                                                 R

Engine’s lubrication

system is

probably operating

normally.

  2015                                                                 R

If an engine operates

with a low oil pressure

and a high oil

temperature, the

problem may

be caused by  

 2015                                                                 R

Leaking oil

dilution valve

  2015                                                                 R

Which fuel/air mixture

will result in the highest

engine temperature

(all other factors

remaining constant)?

 2015                                                                 R

A mixture leaner

than a manual

lean mixture of .060. 

  2015                                                                 R

If an engine cylinder

is to be removed,

at what position in

the cylinder should

the piston be?   

2015                                                                 R

Top dead center. 

2015                                                                 R

The horsepower developed

in the cylinders of a

reciprocating engine

is known as the 

2015                                                                 R

Indicated horsepower.

 Cyl.=Ih 

2015                                                                 R

Engine operating

flexibility is the

ability of the engine to 

2015                                                                 R

run smoothly and give the

desired performance at all speeds 

2015                                                                 R

Standard aircraft cylinder

oversizes usually

range from 0.010 inch

to 0.030 inch.  Oversize

on automobile engine

cylinders may range

up to 0.100 inch. This is

because aircraft engine cylinders 

2015                                                                 R

Have relatively thin walls and may be nitrided.           

 2015                                                                   R

If the ignition switch

is moved from BOTH to

either LEFT or rIGHT

during and engine

ground check,

and unsafe condition

is usally indicated by

2015                                                                 R

a slight drop in PPM.

           2015                                                     R

During ground check

an engine is found

to be rough-running,

the magneto drop is normal,

and the manifold pressure is

higher than normal for any

given RPM.The trouble

maybe caused by           

2015                                                                 R

a dead cylinder. 

2015                                                                 R

What is the

best indication

of worm valve guides?

2015                                                                 R

High oil consumption.

2015                                                                 R

By use of a differential pressure compression tester, it is determined that the No. 3 cylinder of a nine-cylinder radial engine will not hold pressure after

ther crankshaft has been rotated

260  from top dead center compression stroke No. 1 cylinder.  How can this indication usually be interpreted?

2015                                                                 R

A normal indication.

2015                                                                 R

When does valve

overlap occur in the

operation of an aircraft

reciprocating engine?

2015                                                                 R

At the end of

the exhaust stroke

and the beginning

of the intake stroke.

2015                                                                 R

What is an advantage

of using metallic-sodium

filled exhaust valves

in aircraft reciprocating engines?

2015                                                                 R

Reduced valve

operating

temperatures.

2015                                                                 R

Valve clearance changes

on opposed-type engines

using hydraulic lifters

are accomplished by

2015                                                                 R

push rod replacement.

2015                                                                 R

What is likely to occur

if a reciprocating engine

is operated at high

power settings

before it is properly

warmed up?

2015                                                                 R

Oil starvation

of bearings

and other parts.

2015                                                                 R

An increase in

manifold pressure

with a constant PRM

will cause the bearing

load in a an engine to

2015                                                                 R

increase.

2015                                                                 R

Direct mechanical

push-pull carburetor

heat control linkages

should normally be

adjusted so that the

stop located on the

diverter valve will be contacted

2015                                                                 R

before the stop

at the control lever

is reached in

both HOT and COLD positions.

2015                                                                 R

Reduced air density

at high altitude has

a decided effect on

carburetion, resulting

in a reduction of engine power by

2015                                                                 R

excessively enriching the fuel/air mixture.

2015                                                                 R

Increased water vapor

(higher relative huidity) in

the incoming air to

a reciprocating engine

will normally result in

which of the following?

2015                                                                 R

Decreased

engine power at a

constant RPM and

manifold pressure.

2015                                                                 R

(1) Preignition is caused by improper ignition timing.

 (2) Detonation occurs when an area of the combustion chamber becomes incadescent and ignites the fuel/air  mixture in advance of normal timed ignition.

2015                                                                R

Neither No. 1 No. 2 is true

 Preignition

Detonation

2015                                                                R

Which of the following

engine servicing operations

genrally requires engine

pre-piling prior to

starting the engine?

2015                                                                 R

Engine installation.

2015                                                                 R

During the inspection of an engine

control system in whic push-pull

control rods are used, the

threaded rod ends should

2015                                                                 R

be checked for the amount of thread engagement by means of the inpection holes.

2015                                                                 R

Which of the following

conditions would

most likely lead

to detonation?

2015                                                                 R

Use of fuel with

too low an

octane rating.

2015                                                                 R

An uspercharged

aircrft reciprocating

engine, operated at full

throttle from sea level,

to 10,000 feet, provided

the PRM is unchanged, will

2015                                                                 R

lose power due to

the reduced density

of the air drawn

into the cylinders. 

2015                                                                 R

Which of the following

would most likeky cause

a reciprocating engine

to backfire through the

induction system

at low RPM operation?

2015                                                                 R

Lean mixture.

2015                                                                 R

How may it be

determined that a

reciprocating engine

with a dry sump is

pre-oiled sufficiently?

2015                                                                 R

Oil will

flow from the

engine return line

or

indicator port.

2015                                                                 R

What is the basic

operational sequence

for reducing the

power output of an

engine equipped with

a constantspeed propeller?

2015                                                                 R

Reduce the

manifold presure,

then RPM.

 mR>Rm / mretard

2015                                                                 R

Which statement pertaining to fuel/air ratios is true?

2015                                                                 R

The  mixture ratio

which gives the best

power is richer than

the mixture ratio

which gives maximum economy.

bm>mb

2015                                                                 R

Backfiring through

the carburetor generally

results from the use of 

2015                                                                 R

an excessively lean mixture. 

lean  > $

2015                                                                 R

Which of these

conditions will cause

an engine to have

an increased tendency to detonate?

2015                                                                 R

High manifold pressure.

High intake air temperature.

Engine ovdreheated.

 NOT Late ignition timing. 

1,2,3.  HHE  

2015                                                                 R

When will small

induction system

air leaks have the

most noticeable

effect on engine operation?

2015                                                                 R

At high RPM

2015                                                                 R

To reduce the power

output of an engine

equipped with a

constant-speed propeller

and operating near

maximum BMEP, the

2015                                                                 R

RPM  is reduced with the propeller control vefore the manifold pressure is reduced with the throttle control.

 RPM > manifold

2015                                                                 R

One of the best

indicators of reciprocating

engine combustion

chamber problems is 

2015                                                                 R

spark plug condition.

2015                                                                 R

What could cause

excessive pressure

buildup in the

crankcase of a

reciprocating engine?

2015                                                                 R

Plugged crankcase breather.

2015                                                                 R

Excessive

valve clearance

in a piston engine 

2015                                                                 R

Decreases valve overlap.

2015                                                                 R

To what altitude

will a turbo charged

engine maintain

sea level pressure?

2015                                                                 R

Critcal altitude.

2015                                                                 R

If air is heard

coming from the

crankcase breather

or oil filler during

a differential compression

check, what is this an indication of?

2015                                                                 R

Piston ring leakage.

2015                                                                 R

One cause of

afterfiring in an

aircraft engine  is 

2015                                                                 R

an excessively rich mixture.

 $  >lean 

2015                                                                 R

When troubleshooting an engine

for too rich a mixture to

allow the engine to idle,

what would be  

a possible cause?

2015                                                                 R

Economizer valve not operating correctly.  

2015                                                                 R

The density of air

is very important

when mixing fuel

and air to obtain a

correct fuel to air ratio.

Which of the following weighs the most?

2015                                                                 R

100 parts of dry air.

2015                                                                 R

What is a result

of "flashover"

in a distributor?

2015                                                                 R

Conductive carbon trail.

2015                                                                 R

Newton's Law of Motion

generally termed the,

"Law of Momentum",

states: 

2015    [image]                                                               R

Every body persists in its state of rest, or of motion in straight line, unless acted upon by some outside force.

What's Newton's Laws say? (What does a fox say)

The Singing History Teachers  3:38  [image]  

2015                                                                 R

How does the propeller

overspeed governor on

a turboprop engine

decrease propeller RMP?

2015   [image]                                                                 R

By allowing oil to

escape from the propeller

hub thus driving the blades

to  a increased blade angle

ConstantSpeedPropPart1  and 

ConstantSpeedPropPart2

  14:23   ExpertAviator    9:44

   [image]  

2015                                                                 R