Worksheets0-100 part 1
Total questions: 100
Worksheet time: 53mins
Name
Class
Date
1.
Bernoulli's Theorem states that at any point in a flow of gas.
a)
The static pressure and dynamic pressure are equal.
b)
The static pressure is less than the dynamic pressure.
c)
The total energy remains constant.
2.
What dose mineral oil often use?
a)
piston enigine
b)
turbojet engine
c)
turbo fan enigine
3.
What dose synthetic oil often use?
a)
piston enigine
b)
turbojet engine
c)
do not use for aviation engine
4.
How many type of synthetic oil?
a)
3
b)
2
c)
4
5.
What is oil type mostly use for modern gas turbin engine?
a)
2
b)
3
c)
1
6.
What kind of fuel mostly use for modern turbine engine
a)
Jet A
b)
Jet B
c)
Jet A1
7.
The engine air intake has:
a)
The shape divergent
b)
The shape convergent
c)
The shape constant.
8.
What is function of oil supply line filter?
a)
to remove any foreign particles from oil before it reachs to oil nozzle
b)
to remove any fuel from oil before it reachs to oil nozzle
c)
to remove any water from oil before it reachs to oil nozzle
9.
what is the most type pump using for oil system?
a)
piston pump
b)
gear pump
c)
centifugal pump
10.
which statement is correct?
a)
Magnetic chip detectors are small magnets which are in contact with the
supply oil. They collect particles of magnetic metal which are passing
through the oil.
b)
Magnetic chip detectors are small filter which are in contact with the
scavenge oil. They collect particles of magnetic metal which are passing
through the oil
c)
Magnetic chip detectors are small magnets which are in contact with the
scavenge oil. They collect particles of magnetic metal which are passing
through the oil
11.
The supply pump is driven by?
a)
the N2 rotor system
b)
The supply pump is driven by the N2 rotor system via the gearbox
c)
The supply pump is driven by the N1 rotor system via the gearbox
12.
which is statement correct?
a)
Most large jet engines use fuel cooled oil coolers as the primary coolers
because they are efficient and small.
b)
Most large jet engines use fuel cooled oil coolers as the secondary coolers
because they are efficient and small.
c)
Some large jet engines use air cooled oil coolers as primary coolers to
remove excessive heat from the oil
13.
This design employs an external oblique shock wave in supersonic engine inlet for
a)
Increase the supersonic airflow before the normal shock occurs.
b)
Slow the supersonic airflow before the normal shock occurs.
c)
Prevent the shock occurs.
14.
What are main tasks of the engine fuel distribution subsystem?
a)
supply fuel to the engines
b)
pressurize fuel sufficiently for vaporizing in combusion chamber
c)
heat fuel for anti icing, supply fuel to the engines, pressurize fuel sufficiently for vaporizing in combusion chamber
15.
what is component using for measuring the actual fuel flow and
transmits signals to the cockpit for the fuel flow and fuel used indication.
a)
fuel regulator
b)
fuel flow transmitter
c)
fuel quantity probe
16.
What are kind of low pressure fuel pumps?
a)
The fuel pumps are usually impeller type pumps driven by the accessory gearbox
b)
The fuel pumps are usually gear type pumps driven by the
accessory gearbox
c)
the fuel pumps are usually piston type pumps driven by the
accessory gearbox
17.
What are kind of high pressure fuel pumps?
a)
The gear type pump and the impeller type pump.
b)
The gear type pump and the piston type pump.
c)
The impeller type pump and the piston type pump.
18.
What is main function of fuel nozzle?
a)
To heat the fuel so that it
vaporizes and burns as quickly as possible.
b)
To atomize the fuel so that it
vaporizes and burns as quickly as possible.
c)
To regulate the fuel pressure so that it
vaporizes and burns as quickly as possible.
19.
What is main function of fuel control unit?
a)
To meter the fuel necessary for all
operating conditions of the engine
b)
To meter the fuel necessary for take off
operating conditions of the engine only
c)
To regulate the fuel pressure necessary for all
operating conditions of the engine
20.
The engine anti −ice system also uses
a)
The hot air comes from either the pneumatic system or directly from the engine
b)
Electrical heating mats on lips skin panel.
c)
The hot air comes from directly from the engine only.
21.
What is the idle speed?
a)
midle speed is the lowest speed at which an engine operates
b)
idle speed is the lowest speed at which an engine operates
c)
idle speed is the high speed at which an engine operates
22.
What is FADEC stand for?
a)
Full Authority Data Engine Control
b)
Flight Authority Digital Engine Control
c)
Full Authority Digital Engine Control
23.
Which two elements make up the axial flow compressor assembly?
a)
Rotor and stator.
b)
Stator and diffuser.
c)
Compressor and manifold.
24.
What is meant by a compressor stage?
a)
One rotor and one stator assembly.
b)
All rotors and stators.
c)
One rotor and one guide vane assembly.
25.
The ring of fixed blades at the intake of an axial flow compressor are called.
a)
Inlet guide vanes.
b)
First stage stator blades.
c)
First stage diffuser blades.
26.
Which factors are NOT important for the combustion process?
a)
Minimum decrease in pressure
b)
Maximum increase of energy
c)
Minimum decrease fuel consumption
27.
The main components of a centrifugal flow compressor are:
a)
The rotor, the stator and the guide vane assembly.
b)
The rotor, the stator and the compressor manifold.
c)
The impeller, the diffuser and the compressor manifold.
28.
The velocity of the airflow through the compressor will be?
a)
increased
b)
Decreased
c)
Kept constantly
29.
The compression ratio of an axial flow compressor is a function of the.
a)
Number of compressor stages.
b)
Air inlet velocity.
c)
Rotor diameter.
30.
The variable stator vane actuators operate by
a)
Aircraft hydraulic power.
b)
Engine fuel pressure power.
c)
Electrical motor power.
31.
The primary function of the turbine
a)
Supply the torque which is necessary to drive the compressor
b)
Increases the pressure of the incoming air
c)
Increases the velocity of the incoming air
32.
The fan speed of a twin spool axial compressor engine is the same as the.
a)
Low pressure compressor.
b)
Forward turbine wheel.
c)
High pressure compressor.
33.
Combustion chamber flame temperature is in the order of.
a)
2000°Centigrade.
b)
2000°Fahrenheit.
c)
2000°K.
34.
The mainly airflow which comes from the compressor to combustion is
a)
The primary airflow,
b)
The secondary airflow.
c)
The burned airflow.
35.
An air fuel mixture burns best at
a)
A ratio of 15:1
b)
A ratio of 7.5:1
c)
A ratio of 24:1
36.
The fuel air mixture is burned in the combustion chamber
a)
The temperature, the volume of the air increases and the air pressure stays almost constant.
b)
The pressure, the volume and the temperature of the air increases
c)
The temperature, the pressure of the air increases and the volume stays almost constant.
37.
The flame tube is cooled by:
a)
The primary airflow
b)
The secondary airflow
c)
Cooling air system.
38.
A thin coating of ceramic material on the inner surface of the flame tube for
a)
Strengthen the inner liner.
b)
Seal air from the inner liner.
c)
Protect the inner line
against heat.
39.
What are the two main basic components of the turbine section in a gas turbine engine?
a)
Stator and rotor.
b)
Hot and cold.
c)
Impeller and diffuser.
40.
Which does the engine use for the active clearance control of LP turbine?
a)
Compressor bleed air
b)
The engine fan air.
c)
The ram air.
41.
The clearance control valves are controlled by the engine control unit and actuated by
a)
Electric motor.
b)
Pneumatic pressures from PS3 station.
c)
Fuel pressure from the hydro mechanical unit (HMU).
42.
In convergent exhaust nozzles, the maximum airflow at pressure ratios should be below of
a)
Approximately 2:1
b)
Approximately 3:1
c)
Approximately 1:1
43.
The term Pt5 means.
a)
The total pressure at station No.5.
b)
Pressure and temperature at station No.5.
c)
The total inlet pressure outlet No.5
44.
On a four engine aircraft the angle of the reverse stream can be matched by
a)
The correct arrangement of the thrust reverser actuators.
b)
The correct arrangement of the cascade vanes in the thrust reverser cowlings.
c)
The correct troke of the thrust reverser actuators.
45.
What indication does the pilot receive that thrust reversers have deployed?
a)
An audible warning.
b)
A sequence of lights.
c)
A feeling of rapid deceleration.
46.
In normal operation, the pneumatic reversers usually operate with
a)
Pneumatic pressure from aircraft pneumatic system.
b)
Pneumatic pressure from the engine’s HP compressor.
c)
Pneumatic pressure from the engine’s LP compressor.
47.
In maintenance operation, the pneumatic reversers usually operate with
a)
Pneumatic pressure from aircraft pneumatic system.
b)
Pneumatic pressure from the engine’s HP compressor.
c)
Pneumatic pressure from the engine’s LP compressor.
48.
The accessory gearbox of a high bypass engine is.
a)
On the HP Compressor housing.
b)
In the forward bearing housing.
c)
Attached to the turbine casing.
49.
The type of seal between the drive shaft and the gearbox is :
a)
Carbon seals
b)
Labyrinth seals.
c)
Rubber seals.
50.
How are bearings lubricated?
a)
By grease.
b)
By oil.
c)
By lubricant.
51.
Which are the indications give the
engine thrust value?
a)
The rotational speed of the fan, called N1, or the engine pressure ratio.
b)
The rotational speed of high pressure turbin, called N2, or the engine pressure ratio.
c)
The rotational speed of the fan, called N1, or the rotational speed of high pressure turbin, called N2..
52.
How is the EPR corresponded to the engine thrust?
a)
It is a signal from EPR sensor to engine control unit.
b)
It is the ratio of the total pressure at the turbine outlet to the total pressure at the fan inlet.
c)
It is the ratio of the static pressure at the turbine outlet to the static pressure at the fan inlet.
53.
The highest heat to metal contact in a jet engine is the.
a)
Burner cans.
b)
Turbine inlet guide vanes.
c)
Turbine blades.
54.
Where are the magnetic chip detectors installed?
a)
On the pressure lines.
b)
On the scavenge lines.
c)
On the supply lines.
55.
The fuel flow transmitter measures
a)
The mass flow of fuel between the fuel pump and fuel control unit.
b)
The mass flow of fuel across the fuel boost pumps.
c)
The mass flow of fuel between the fuel control unit and the fuel nozzles.
56.
Which methods of cooling the air that passes through the core
engine can be used?
a)
Engine with water sprayed system
b)
Engine with fan air cooling system.
c)
Engine with fluid cooling system.
57.
Possible methods are used to compensate power of engine:
a)
Increasing the airflow density
b)
Increasing the airflow temperature.
c)
Increasing the airflow pressure.
58.
Engine with water injection system can spray water:
a)
Into the engine air intake or into the front of the combustion chamber.
b)
Into the engine air intake or into the inside of combustion chamber.
c)
Into the front of the combustion chamber or into the inside of combustion chamber.
59.
What type of water can be used in engine water injection system?
a)
Plain water only.
b)
Water methanol mixture only.
c)
Plain water or water methanol mixture.
60.
What type of mixture water can be used in engine water injection system?
a)
Water fuel mixture.
b)
Water methanol mixture.
c)
Water ethanol mixture.
61.
Afterburning engine consists of the introduction and burning of fuel in:
a)
An area behind the high pressure turbine.
b)
An area behind the engine turbine.
c)
An area behind the main combustion chamber.
62.
Afterburning engine will accelerate the airflow of:
a)
The primary airstreams.
b)
Secondary airstreams.
c)
Both the primary and secondary airstreams.
63.
What type of afterburner exhaust nozzles are used?
a)
The variable−area exhaust nozzles.
b)
The divergent exhaust nozzles.
c)
The convergent exhaust nozzles.
64.
Which of the ignition system in aft burner engine has NOT the igniter plug?
a)
Catalytic ignition
b)
Spark ignition
c)
Hot shot ignition.
65.
Which of the ignition system in aftburner engine have the igniter plugs?
a)
Catalytic ignition and hot shot ignition.
b)
Catalytic ignition and spark ignition.
c)
Spark ignition and hot shot ignition.
66.
Thrust force is measured in
a)
N (Newton)
b)
KN (kilo Newton)
c)
Both N and kN
67.
Which engine sections use nickel base alloys as main material
a)
Pressure compressor, combustion section, high and low pressure turbines
b)
Pressure compressor, combustion section and low pressure turbines
c)
Pressure compressor, combustion section and high pressure turbines
68.
One disadvantage of turbojet engines is
a)
Use more fuel
b)
Very loud
c)
Only use on small A/C
69.
In Principles of Jet Propulsion, to accelerate air, the air pressure must be
a)
Decreased
b)
Increased
c)
Remain constant
70.
How many main environmental parameters that cause a change in the thrusts of a jet engine
a)
4
b)
3
c)
5
71.
If the airflow is constant and you decrease the diameter of the jet nozzle
a)
The outlet velocity does not change
b)
The outlet velocity decrease
c)
The outlet velocity increase
72.
The thrust is generated by
a)
Pushing against the atmosphere
b)
Acceleration of airflow
c)
Acceleration of airflow and pushing against the atmosphere
73.
With increasing altitudes
a)
The ambient pressure decreases and the temperature decreases
b)
The ambient pressure decreases and the temperature increases
c)
The ambient pressure increases and the temperature decreases
74.
A turbo jet engine gives.(Level 1)
a)
large acceleration to a small mass of air.
b)
large acceleration to a large weight of air.
c)
small acceleration to a large mass of air.
75.
A jet engine derives its thrust by.(Level 1)
a)
drawing air into the compressor.
b)
impingement of the propelling gases on the outside air.
c)
reaction of the propelling gases.
76.
In a free turbine.(Level 1)
a)
there is a clutch between compressor and power output shaft.
b)
there is a direct drive with a free-wheel unit.
c)
there is no mechanical connection with the compressor.
77.
The working fluid of a gas turbine engine is.(Level 1)
a)
gasoline.
b)
kerosene.
c)
air.
78.
The diffuser section is located between.(Level 1)
a)
the burner section and the turbine section.
b)
station No. 7 and station No. 8.
c)
the compressor section and the burner section.
79.
If the LP shaft shears.(Level 1)
a)
turbine runaway occurs.
b)
compressor overspeed occurs.
c)
compressor underspeed occurs.
80.
The term Pt7 means.(Level 1)
a)
pressure and temperature at station No. 7.
b)
the total pressure at station No. 7.
c)
the total inlet pressure.
81.
When a volume of air is compressed.(Level 1)
a)
heat is gained.
b)
no heat is lost or gained.
c)
heat is lost.
82.
If a volume of a mass of air is 546 cubic feet at 273K, at 274K it will be.(Level 1)
a)
2 cubic feet greater.
b)
1/273 less by weight.
c)
2 cubic feet smaller.
83.
A high bypass engine results in.(Level 1)
a)
overall slower airflow and greater propulsive efficiency.
b)
overall faster airflow.
c)
greater propulsive efficiency.
84.
The Brayton cycle is known as the constant.(Level 1)
a)
temperature cycle.
b)
mass cycle.
c)
pressure cycle.
85.
In a choked nozzle, velocity increases, and.(Level 1)
a)
density decreases.
b)
pressure decreases.
c)
pressure increases.
86.
Using standard atmospheric conditions, the standard sea level temperature is.(Level 1)
a)
29°C.
b)
59°F.
c)
59°C.
87.
Standard sea level pressure is.(Level 1)
a)
29.92 inches Hg.
b)
29.29 inches Hg.
c)
29.00 inches Hg.
88.
The propulsive efficiency is.(Level 1)
a)
low, with a low mass flow acceleration.
b)
high, with a low mass flow acceleration.
c)
high, with a high mass flow acceleration.
89.
The RPM for maximum power would be.(Level 1)
a)
lower on a colder day.
b)
lower on a hotter day.
c)
greater on a colder day.
90.
With a fixed throttle in a climb.(Level 1)
a)
RPM will increase.
b)
RPM will remain constant.
c)
RPM will decrease.
91.
Power is adjusted in a gas turbine engine by.(Level 1)
a)
increasing fuel flow.
b)
increasing air and fuel flow.
c)
increasing airflow to the combustion chamber.
92.
The engine rating plug.(Level 1)
a)
is permanently connected to the E E C.
b)
is connected to the EPR transmitter.
c)
is permanently connected to the Engine casing.
93.
Flat Rated thrust is defined as.(Level 1)
a)
the thrust at the ambient temperature point above which thrust drops below 100%.
b)
that power achieved at idle RPM.
c)
that power achieved at maximum EGT.
94.
Propeller torque is analogous to.(Level 1)
a)
engine RPM.
b)
shaft horsepower.
c)
propeller RPM.
95.
The total power in a turboprop engine is the.(Level 1)
a)
SHP.
b)
BHP.
c)
E S HP .
96.
In a dive, with the throttles fixed, the EPR will.(Level 1)
a)
not change.
b)
increase.
c)
decrease.
97.
With an increase in forward speed, the engine thrust.(Level 1)
a)
decreases slightly but recover due to ram effect.
b)
increases.
c)
decreases.
98.
To ensure an engine maintains self sustaining speed.(Level 1)
a)
idle remains same for any density.
b)
idle increases with density decrease.
c)
idle increases with density increase.
99.
A factor that limits EGT is the.(Level 1)
a)
jet pipe.
b)
compressors.
c)
turbine.
100.
Thrust will.(Level 1)
a)
increase at high temperatures.
b)
decrease at low temperatures.
c)
increase at low temperatures.
100 %
