AGK

Question 1

An engine is running with the mixture fully rich. Progressive leaning will produce
1. best power first, then best economy
2. best economy first, then best power
3. best power at peak EGT
4. best economy at peak EGT

Answer 1

A

Question 2

A descent from high altitude where the engines have been leaned to peak EGT is made with no adjustment being made to the mixture. As the descent is continued to sea level.
a. mixture will become too rich due to the increase air density
b. cylinder head temperature will rise and back firing could occur
c. the increasing air density will cool the air too rapidly
d. a leaner mixture will be accompanied by decreasing manifold pressure

Answer 2

B - descent into denser air causes the mixture to become too lean. Backfiring is a characteristics of a lean mixture, as it overheating

Question 3

1. During the normal advancement of the throttle on a turbocharged engine, the manifold pressure quickly becomes excessive. This could be caused by
   
   1. the waste gate being jammed open
   2. the waste gate being jammed shut
   3. an exhaust leak upstream of the waste gate
   4. an exhaust leak downstream of the waste gate

Answer 3

B

Question 4

30. The manifold pressure gauge indication on a normally aspirated engine operating at full power should be
31. slightly below the ambient atmospheric pressure
32. slightly above the ambient atmospheric pressure
33. significantly below the ambient atmospheric pressure
34. significantly above the ambient atmospheric pressure

Answer 4

C - In a normally aspirated engine, manifold pressure rises as the throttle is opened. It approaches, but never reaches the ambient pressure (if Manifold pressure ever reaches ambient atmospheric pressure the engine could not run since there would be no reason for gas to flow into the engine)

Question 5

If airflow to the oil cooler is interrupted by an obstruction in the duct

1. oil temperature and oil pressure will rise
2. oil temperature will drop and oil pressure will rise
3. oil temperature will rise and oil pressure will fall
4. oil temperature and oil pressure will both fall

Answer 5

C - Airflow through the cooler is required to carry the heat away. If the airflow is interrupted, the oil temperature will rise. Hot oil flows too easily and eventually the pressure will become lower

Question 6

The purpose of gearing a propeller in an aircraft engine is to permit the propeller to turn at

1. higher RPM and lower torque than the engine
2. lower RPM and torque than the engine
3. lower RPM and higher torque than the engine
4. ## higher RPM and lower torque than the engine

Answer 6

C - Higher RPM produce more engine power. However, high RPM reduces the propeller’s efficiency. A gear box allows the engine’s power to be transmitted to the propeller in the form of greater torque but lower RPM

Question 7

Operating an engine with too low an oil quantity will produce

1. rising oil temperature and pressure
2. falling oil temperature and rising oil pressure
3. falling oil pressure and falling oil temperature
4. ## rising oil temperature and dropping oil pressure

Answer 7

D

Question 8

Question No 30
Oil pressure is usually measured
1. immediately before the pump
2. immediately after the pump
3. immediately before the oil enters the engine
4. as the oil returns to the sump

Answer 8

C - oil pressure is usually measured just before the oil goes to do its vital work i.e. just before it enters the engine oil gallery

Question 9

On a 4-stroke engine, the ignition is timed so that the spark occurs

1. after TDC on the power stroke
2. before TDC on the compression stroke
3. after TDC on the compression stroke
4. before TDC on the power stroke

Answer 9

B - the spark occurs just before TDC (between 20* - 30* before the piston reaches the top of its travel. This allows time for the fuel to burn so that combustion is complete at the point where maximum torque can be produced

Question 10

he duration of each stroke of a 4-stroke cycle is equivalent to

1. 360 degrees of crankshaft rotation
2. 180 degrees of crankshaft rotation or half a revolution I
3. 720 degrees of crankshaft rotation
4. half a revolution so long as there are only 4 cylinders

Answer 10

B - each stroke occupies half a turn of the crankshaft

Question 11

An engine with a combustion chamber of 13 cubic inches capacity and a swept volume of 78 cubic inches, has a compression ratio of

1. 5 to I
2. 6 to I
3. 7 to I
4. 8 tol

Answer 11

C

Question 12

Friction horsepower is

1. the difference between the brake horsepower and the rated horsepower
2. the difference between the indicated horsepower and the brake horsepower
3. brake horsepower divided by indicated power
4. the difference between indicated horsepower and the rated power of the engine

Answer 12

B - friction horse power reprensets the loss between the power deliver to the piston Indicated horse power and the power that is available to drive the crankshaft (brake horse power)

Question 13

The purpose of a scavenge pump in an oil system is to

1. to pump the oil from the sump to the gallery in a wet sump system
2. to pump the oil from the gallery to the sump in a wet sump system
3. to provide stand-by power if the main oil pump fails in a dry sump system
4. to remove the oil from the engine and send it to the external oil tank in a dry sump system

Answer 13

D - The scavenge pump is found only in a dry sump oil system. It removes oil from the engine and pumps it to the external tank

Question 14

1. Manufactueres publish a list of various MAP and RPM values to achieve a given power setting. The most efficient engine performance can be expected when the pilot selects
   
   1. the combination which gives the lowest MAP and highest RPM for increased volumetric efficiency
   2. the combination which gives the lowest RPM and highest MAP for increased volumetric efficiency
   3. the combination which gives the lowest MAP and highest RPM for increased compression ratio
   4. the combination which gives the lowest RPM and highest MAP for increased compression ratio
      -

Answer 14

B
This is because low RPM allows the valve to remain open longer during the induction and exhaust stroke thereby improving the flow of gas into and out of the cylinders.

The volumetric efficiency is improved when low RMP is used with high MAP

Question 15

1. Take off power is
   
   1. The same as maximum continuous power
   2. higher than maximum continuous power but may be used providing the mixture if fully rich
   3. used for short periods such as take-off with a time limit of about three minutes
   4. used only during an emergency take-off

Answer 15

C - Take-off power represents more than 100% power. Because of the increased engine temperature and decreased cooling airflow at take-off, a time limit is normally imposed.

Question 16

2. On application of carburettor heat in an aircraft with suspected carburettor icing, the engine immediately starts misfiring and running roughly. The correct action would be
   
   1. leave the carburettor heat on allowing the ice to melt and the engine to return to normal once the ice has dissipated
   2. lean the mixture because the application of carburettor heat has richened the mixture
   3. richen the mixture to overcome the loss in power caused by the rough running
   4. return the carburettor heat to the off position and descend to a lower altitude and warmer air

Answer 16

A. The ice doesn’t melt immediately so for a few seconds you have ice and hot air. This causes the engine to lose even more power and run more roughly until the ice has melted 5 to 10 seconds

Question 17

32. A blocked fuel injector in an aircraft fitted with a pressure transducer fuel metering system can be indicated by
33. a higher than normal fuel pressure reading
34. a higher than normal exhaust gas temperature
35. a lower than normal fuel flow reading
36. a lower than normal fuel pressure reading
    -

Answer 17

A -he blockage make its more difficult for the fuel to flow through the lines. If the pump tries to push it and it can’t get out pressure it built up in the lines

Question 18

1. If an aircraft fitted with a rubber fuel cell suffers a blockage of the fuel tanks vent, continued operation may cause
   
   1. the pressure in the cell to increase causing the cell to collapse
   2. the pressure in the cell to decrease causing the cell to collapse
   3. the pressure in the cell with increase causing the cell to inflate
   4. the cell may collapse and send too much fuel to the engine
      -

Answer 18

B - the rubber cell is not rigid structure so as fuel is removed it will tend to collapse as pressure within drops

Question 19

Question No 9
Solenoids allow a heavy circuit to be turned on or off by the use of
a) a strong spring
c) hydraulic pressure
b) high voltage from the battery
d) lighter current to an electromagnet

Answer 19

D -

Question 20

Question No 12
If a magneto earth lead becomes disconnected or breaks

1. that magneto cannot be turned off
2. that magneto will not provide any spark
3. the engine will “dead cut” when that magneto is selected
4. that magneto will provide intermittent spark

Answer 20

A

Question 21

Question No 16
A leak in the induction system of a turbocharged engine with automatic boost control will become worse
a. during taxi
b. at take-off
c. during cruise at low level
d. on a climb to high level

Answer 21

D

Question 22

Question No 19
An aircraft is equipped with a voltmeter. Before start-up with the master switch on, the voltmeter reads 24 volts.
The reading that would indicate normal operation during cruise would be
a. 24 volts.
c. 28 volts.
[b] less than 24 volts
[d] varying depending on the load on the system

Answer 22

C

Question 23

Question No 23
Your aircraft is equipped with a voltmeter and you note that before start-up with the master switch on, the instru-
ment reads 24 volts. After an alternator failure in flight, this instrument would be expected to read
a. zero
b. more than 24 volts
c. less than 24 volts
d. 24 volts

Answer 23

D

Question 24

Question No 27
In the event of a failure of the generator or alternator of an aircraft’s electrical system there will be an ammeter
indication and
1. a high current discharge from battery to generator or alternator
2. a deterioration of all electrical services including ignition
3. a high discharge showing on a left-hand zero ammeter
4. no obvious change in electrical services

Answer 24

D

Question 25

With the majority of opposed engines, the right-hand magneto
1. fires the left top and the right bottom plugs
2. fires the right top and left bottom plugs
3. fires the left top spark plug first
4. fires both plugs immediately

Answer 25

A

Question 26

Question No 35
When one magneto is switched OFF in a dual ignition system
a. engine power is reduced because the increased combustion time results in a lower peak
combustion pressure later in the power stroke
b. the peak combustion pressure is reduced
c. the ignition timing will be ‘retarded’, i.e. peak pressure will occur late in the power stroke
d. engine power is increased

Answer 26

A

Question 27

Question No 37
A condenser is incorporated in the primary circuit ofa magneto to
a. prevent burning of the points
b. prevent damage to the armature of the rotating magnet
c. prevent sudden collapse of the primary circuit
d. permit the current to jump the points at the correct instant

Answer 27

A

Question 28

Question No 38
Shielding, as employed in aircraft electrical systems, is used for
a. preventing leakage of high voltage
b. reducing noise in radio receiving and transmitting equipment
c. protecting the pilot from injury by electrical shock
d. providing a return ground path for rubber shock mounted equipment

Answer 28

B

Question 29

Question No 47
In an engine fitted with an automatic waste gate, oil pressure is used to
a. open the wastegate in order to direct more air through the turbine
b. close the wastegate in order to direct more air through the turbine
c. open the wastegate in order to allow less air to bypass the turbine
d. close the wastegate in order to allow more air to bypass the turbine

Answer 29

B

Question 30

Question No 50
When conducting a magneto check during run-up in an aircraft with separate switches for each magneto, there
is no change in RPM when the right magneto is switched off then on again and the engine fails when the left
magneto is switched off. A fault which would cause this is
a. the left magneto has failed
b. the right magneto has failed
c. the left magneto is live
d. the right magneto is live

Answer 30

B

Question 31

Question No 58
During normal advancement of the throttle of a turbo charged engine, the MP rose excessively, this could have
been caused by
a. an exhaust leak upstream of the waste gate
b. an exhaust leak down stream of the waste gate
c. the waste gate being jammed shut
d. the waste gate being jammed open

Answer 31

C

Question 32

Question No 60
If a left-hand-zero ammeter indicates an unusually high charge rate during flight
a. the electrical system is overloaded
b. the indication would be normal if all electrical loads are turned on
c. the battery is frilly charged
d. the alternator has failed

Question 33

Question No 63
The purpose of a waste gate is to
a. direct exhaust gases to the inlet impeller
b. release excess inlet manifold pressure to the atmosphere
c. direct exhaust gases through the turbine to increase manifold pressure
d. maintain atmospheric pressure in the inlet manifold

Answer 33

C

Question 34

During a ground magneto check you notice that there is no RPM drop when the switches are selected from
‘BOTH’ to ‘LEFT’. However when the selection from ‘BOTII’ to ‘RIGHT’ is made, a normal RPM drop is ob-
served. A likely cause would be
a. the left magneto is in excellent condition
b. there is a fault in the right magneto earthing system
c. there is a fault in the left magneto earthing system
d. the left magneto spark plugs need replacing

Answer 34

B

Question 35

Question No 4
An oleo leg on an undercarriage assembly

a. should be kept correctly inflated with oil and gas
b. should be protected from any compression loads
c. is operated by the aircraft’s hydraulic system
d. is only ever used on the nose wheel assembly

Answer 35

A

Question 36

Question No 7
Some tachometers display a red arc between certain RPM settings. This indicates

a. where detonation is most likely
b. these RPM values must not be used under any circumstances
c. never operate the engine at RPM values above that arc
d. avoid continuous operation at these RPM values

Answer 36

D

Question 37

Question No 11
If a direction indicator becomes toppled during flight the instrument will

a. need to be reset but will remain serviceable
b. be unserviceable for the rest of the flight
c. automatically reset itself and remain serviceable
d. remain fixed on one heading

Answer 37

A

Question 38

Question No 28
High Rate Discharge fire extinguishing systems, discharge the extinguishing agent

into the cabin on large pressurised aircraft
into the intake turbine on jet aircraft
into the carburettor intake on piston engine aircraft
into the engine nacelle on piston engine aircraft

Question 39

Question No 30
Ionizing and optical (photoelectric) smoke detectors are used to detect possible fires in

the engine cowl area
the engine air intake section
the turbine outlet section
the cabin or crew compartment

Answer 39

D

Question 40

Question No 29
Wire loop fire detection systems are designed to detect fires

in the exhaust section of a turbine
in the inlet section ofa turbine
in the engine cowl enclosure
in the cabin and airframe structure on large aircraft

Answer 40

C

Question 41

Question No 37
Force in a hydraulic system is

pressure per unit area
pressure multiplied by area
pressure divided by area
pressure multiplied by velocity

Answer 41

B

Question 42

Question No 40
The reservoir in a hydraulic system supplies

emergency system pressure
pressure to the pump
a place to store system fluid when the system is shut down
a reserve of fluid to compensate for minor leaks

Answer 42

D

Question 43

Question No 49
When carrying out a rate-one left turn onto north in the southern hemisphere, the pilot should roll out of the turn
on a heading of approximately
0000M
0150M
3450M
0100M

Answer 43

C

Question 44

Question No 50
Hydraulic fluid requires which of the following properties?

low flash point
high viscosity
lubricating properties
low thermal stability

Answer 44

C

Question 45

Question No 53
De-icing boots should be activated

at all times in cloud above the freezing level
whenever the temperature is below zero
after ice has formed
before entering a region where ice is likely to be encountered

Answer 45

C

Question 46

2. When a constant speed propeller is in the feather position it is
   a. windmilling
   b. on the fine pitch stops
   c. streamlined to the airflow
   d. on the coarse pitch stops

Answer 46

D

Question 47

4. During a turn, the reading of magnetic compass in the southem hemisphere will.

lead ahead of the aircraft when turning onto south
lag behind the aircraft when tuming onto east or west
lead ahead of the aircraft when turning onto north
lag behind the aircraft when tuming onto north
Answer

Answer 47

A

Question 48

34. If the aircraft’s trim condition changes during flight due to fuel bum off with the autopilot on

the autopilot’s servo motor may overheat
the autopilot will always automatically retum it to the trimmed condition
the autopilot may automatically disengaged
a warning light will alert the pilot to the need to retrim
Answer

Answer 48

C