Maintenance MCQs
Aircraft Engine Maintenance Quiz
Test your knowledge on aircraft engine maintenance with this comprehensive quiz! Covering critical aspects like airworthiness directives, turbine engine components, and operational procedures, this quiz is designed for aviation enthusiasts and professionals alike.
- 30 challenging multiple-choice questions
- Assess your understanding of engine systems and maintenance
- Perfect for students or anyone interested in aviation
When will an engine AD (Airworthiness directive) be “complied with” after it becomes Effective?
As specified in the AD.
During the next Scheduled inspection
Within 30 calendar days.
The ATA 100 system
Each area in A/C is assigned to a specific chapter
Information is broken down to chapter/section/subject
All the above
Cowls are used for:
A) Give engine streamline aerodynamic shape
B) Protect E.C. From F.O.D.
C) Both (a) & (b)
How are most aircraft turbine engine fire-extinguishing systems activated?
A) Electrically discharged cartridge.
B) Piston stem and plunger.
C) Push rod assembly.
Reducing compressor blades vibration and improving airflow characteristics are achieved by
A) Fir tree blades attachment
B) Shrouded compressor blades
C) Internal cooling for blades
The material used in production of compressor discs is:
A) Titanium and stainless Steel
B) Carbon fiber and Stainless Steel
C) Nickel-base alloy
V.S.V. Location:
A) Between LPC case & HPC case
B) Front Stages of H.P.C
C) At H.P.C case
For a dual G.T.E. When a surge occurs, the EGT indicator
A- Increases
B- Decreases
C- Constant
Excessive air bleeding from compressor causes EPR indicator
A- Increases
B- Decreases
C- Constant
For an engine operating at cruise speed, the situation for the following valves;
A- V.S.V. (closed), and V.B.V. (opened)
B- V.S.V. (opened), and V.B.V. (closed)
C- V.S.V. (opened), and V.B.V. (opened)
Turbine Case Cooling System is used to:
A) Prevent turbine discs over heat
B) Cool turbine blades & prevent Creep
C) Control tip clearance for turbine during cruise
The material used in production of compressor turbine disc is:
A) Titanium
B) Stainless Steel
C) Nickel alloy
A turbine case cooling air system is used in G.T.E. to
A- improve e.g., Performance during take offs
B- Control cooling of HPT discs at cruise
C- Control tip clearance between turbine blades and cases
For the operating engine at high power, it's recommended to operate at idle power for 5 minutes before shutting down in order to:
A-prevent seizure of engine bearings
B-prevent vapor from locking in fuel lines
C-allow turbine rotor to cool before the case contract around it
The turbine disk is life limited by
A) Cycles and flight hours
B) Flight hours and calendar date
C) Cycles and calendar date
Thrust reverser for GTE is used to:
A-Decrease speed of A/C during flight
B-Allow for A/C push back at airports
C-Decrease A/C speed after landing before using landing gear brakes
Which of the following engine components is produced from heat resistant nickel base casting?
A- Nose cowl
B- engine. Bearing
C- Fan blades
D- Exhaust case
The thrust reverser usually operates when:
A. Engine ON and Aircraft Flight
B. Engine ON and Aircraft on ground
C. Engine OFF and Aircraft on ground
The APU electrical power is mainly used when:
A) A/C Engine ON and Aircraft flight
B) A/C Engine ON and Aircraft on ground
C) A/C Engine OFF and Aircraft on ground
The APU starter takes its power from
A. Lead compressor
B. Aircraft Batteries
C. Power section
The exhaust gas of TPE and TSE
A) produces thrust at Engine Exhaust
B) it’s only a harmful product of a useful combustion process
C) Both A and B
For engine core bearing compartment, the seals used are:
A) Rubber & Silicon rubber seals
B) Carbon & Labyrinth seals
C) Labyrinth & Teflon seals
In which sub-system the chip detector is located?
A- pressure
B- scavenge
C- vent
In case of main oil pressure filter is completely clogged:
A- oil supply to bearings will be blocked
B- oil will be by-passed to the tank
C- by-pass valve will be open & oil will be supplied unfiltered to the bearings.
"Cocking" means:
A- coating turbine blades with carbon
B- oxidization of blades due to high temperature
C- blocking oil tubes by layers of carbon due to excessive high oil temperature.
When will the engine oil level must be checked?
A. After 100 hours inspection
B. At Daily inspection
C. After each flight
The sight glass function and location are
A. Indicates oil quantity at engine oil tank
B. Indicates oil pressure at pilot cockpit
C. Operate warning caution for engine oil chip existence
Differential oil pressure switch is usually used for
A. Indicating Engine oil pressure at pilot cockpit
B. Sending a caution that main oil filter is clogged and the oil is bypassed
C. Making alarm for fire detection
Which of the following items included in a typical ignition system? 1- Igniter, 2- Inverter, 3- Exciter, 4- High tension lead
A- 1, 2 and 3
B- 1, 3 and 4
C- 2, 3 and 4
Which of the following items could be included together in an engine fuel control system? 1- FCU, 2- FADIC, 3- Start Switch, 4- Governor
A- 1, 2 and 3
B- 2, 3 and 4
C- 1, 3 and 4
Which of the following items could be included in airframe fuel system? 1- Fuel Booster Pump, 2- FCU, 3- Fuel Tank, 4- Fuel Shut-off Valve
A- 1, 2 and 3
B- 2, 3 and 4
C- 1, 3 and 4
Engine Fuel Pump provides -------------- fuel to the FMU
A. Clean By-passed
B. Filtered Unmetered
C. Filtered Metered
The fuel flow divider primary valve opens at ------- fuel pressure than secondary valve.
A. lower
B. higher
C. Higher pure
Which of the following Engine fuel components are LRU (line maintenance units)
A. FCU
B. FADEC
C. Fuel Filter Element
D. Fuel nozzle
E. All above
A white smoke is shown over engine hot section; it is an indication of --------
A. Oil leaking
B. Fuel Leaking
C. Air Leaking35
A black smoke is shown past engine exhaust; it is an indication of ------------
A. Oil leaking
B. Fuel Leaking
C. Air Leaking
In case of engine out of a flying aircraft, the indication system shows the situation to the pilot by:
A. Vision and smelling
B. Tasting and hearing
C. Vision and hearing
The engine parameters include
A. EGT, Ng and fuel quantity
B. Ng, Engine oil Pressure and EGT
C. Altitude, OAT and Torque
Which of the following items included in a T5 indication system? 1- Temperature transmitter 2- thermo-couple probes 3- Confirmation box 4- TOT indicator
A- 1, 2 and 3
B- 1, 3 and 4
C- 2, 3 and 4
Instrument panel contains
A. Warning unit, T5 indicator and Ignition circuit breaker
B. Torque indicator, Engine oil temperature indicator and VHF communication
C. Ng indicator, Engine oil Pressure indicator and warning unit
In which location of pilot cockpit can find Electrical system switches and circuit breaker
A. Overhead console
B. Instrument panel
C. Pedestale (center console)
Torque split can be monitored in
A. Torque transmitter
B. Torque Indicator
C. Mast Moment bar-graph
Which of the following items are monitoring by triple rotor indicator in a twin engines A/C? 1- Main Rotor RPM 2- Eng#1 N1g 3- Eng#1 N2p 4- Eng#2 N2p
A- 1, 2 and 3
B- 1, 3 and 4
C- 2, 3 and 4
During starting GTE, at which gas producer rpm speed, the ignition will stop
A. Self-sustain speed
B. Cranking speed
C. Cruise speed
During GTE starting and after gas producer rpm speed exceeds the self sustain speed, the compressed air will be introduced to the CC by:
A. Starter derived by compressor
B. Compressor derived by starter.
C. Compressor derived by compressor turbine
Which of combustion triangle elements is introduced to CC at all Ng range of GTE operation?
A. Air
B. Fuel
C. Ignition
Which of the following engine parameters are starting to increase only after engine Ng reaches cranking speed?
A- T5
B- P3
C- COMPRESSOR RPM
The sequence for engine starting is:
A- fuel, ignition, starter
B- Starter, fuel, ignition
C- Starter, ignition, fuel
Which Staring mode the pilot can select in case of the FADEC system inoperative?
A. Manual starting mode
B. FADEC starting mode
C. Automatic starting mode
For the operating engine at high power, it's recommended to operate at idle power for 5 minutes before shutting down in order to:
A- prevent seizure of engine bearings
B- prevent vapor from locking in fuel lines
C- allow turbine rotor to cool before the case contract around it
The engine power is limited by 1.Max. T5 2. Max Engine Oil Pressure 3. Max. P3
A- 1 and 3
B- 1 and 2
C- 2 and 3
Which of the following not considered engine rating?
A. Idle
B. Take off
C. Max climbing
To adjust fuel to air ratio for engine operation at winter or summer season, the engine FADEC need to monitors
A. T5
B. Ng
C. OAT
The Engine Oil samples should be taken;
A. At an uninterrupted frequency of engine flight hours
B. Immediately after Engine shut down
C. Only during Engine Overhaul
The engine parameter health monitoring system contains: 1. DCU 2. EEC 3. Sensors 4. Oil analysis indicator
A- 1,2 and 3
B- 1,3 and 4
C- 2,3 and 4
The engine trend checks maybe carried out 1. On a daily basis 2. As an optional requirement 3. With a loaded engine condition 4. With multiple checks to draw analysis graph
A- 1,2 and 4
B- 1,3 and 4
C- 1,2 and 3
Which of the following conditions may affect on actual trend line in engine trend graph?
A. Full fuel or low fuel tank
B. Summer or winter
C. anti-ice system on or off
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