September Session Questions
- A turbo prop —
(a) Engine fitted, but will not accelerate in several speed
(b) Fuel control gives relative value sensing
(c) Defective fuel nozzles
(d) Fuel from the main fuel control valve bleed
Note: (3) (b, d) only - MTCS
(a) Acceleration temperature too high during starting due to fuel control bypass valve sticking (closed), fuel control arm
incorrectly adjusted
(b) (X) Acceleration temperature too low during starting due to acceleration control incorrectly adjusted
(c) All the above - Mass × time motion related with:
(a) P.E. (b) K.E. (c) Both - Turbine engine exhaust is calculated as per resistance: (a) First law (b) Second law (c) Third law
- Bernoulli’s principle states that the static pressure of a fluid decreases at a point where the velocity of the fluid
increases, provided no energy is added to or taken away from the fluid. - The gaseous energy is taken by turbine in which: (a) P2 temp. volume increases, decreases [wording unclear]
CONCEPT - There is a sudden drop in pressure and increase in volume in which setting of the engine? (a) Compression (b)
Combustion chamber (c) Exhaust - Specific fuel consumption:
(a) Weight of fuel in lbs/hr to thrust in lbs
(b) _ kg/hr to BHP in lbs
(c) lbs/hr to thrust in _ - The principle of G.T.E. is to burn fuel to extract mechanical energy.
- Which is best fuel efficient? (i) Turbojet (ii) Turbofan (iii) Turbo shaft
- The SHP in turbo shaft engine achieved through: (i) Power section (ii) Output shaft (iii) Free turbine (iv) Engine
shaft - EAT is the reference point for: (a) TIT.
- Air intake design supports static and dynamic pressure at the inlet to be delivered with increased pressure at the
compressed inlet without duct losses (total loss). - Air intake supports inlet incoming air at all operating conditions at altitudes up to Mach speed.
- For largest measurement parameters considered are: (a) Engine RPM (b) Turbine distance PS (c) EPR (d) All
- EAT is a monitor. Exhaust temperature is indicated for monitoring: (a) Combustion chamber heat (b) Turbine
casing heat (c) Turbine blades heat (d) All - Location of diffuser: (a) Between compressor & combustion chamber (b) _ (c) _
- Bellmouth inlet is usually installed on an engine undergoing testing in a test cell. Note: “same repeated MTCS”
written underneath. - Primary function of compressor:
(a) To supply air in sufficient quantity to satisfy the requirement of combustion burner.
(b) Might increase the pressure of the mass of air received from air inlet. - In the compressor bleed air systems: (a) Bleeding air is utilized for various functions (b) Atmospheric air is utilized
for combustion chamber cooling (c) _ - Compression is combination of: (a) Stator, rotor (b) Rotor, stator
- Large G.T.E. use around three compressors. It is:
(a) Large volume of air can be handled at each stage, comparatively suitable.
(b) F.O.D. minimized.
(c) Understand of off design [unclear]. - In centrifugal compressor no. impeller is made of:
(a) Forged aluminium alloy, heat treated, machined, and assembled forged, for minimum flow restriction and
turbulence.
(b) Single forged aluminium steel alloy. - The gas from nozzle section strikes turbine blades at: (a) Right angle (b) Most effective angle (c) Passes through
zero angle. - The stator blades converting high velocity to pressure.
- The incoming air acts on compressed blade is called angle of attack.
- The passage of air inside the engine changes due to: (a) Addition of fuel (b) Throttle position control (c) Engine
design. - In the can-type combustion chamber outer case is divided to facilitate: (a) Supply of cooling air (b) Facilitate liner
replacement (c) For maintenance. - In can-type flame tube assembly: (a) To supply fuel (b) To distribute flame during starting.
- Secondary air entering into C.C. to cool the gases up to: (a) 3000°F (b) 2000°F (c) 1500°F (d) 1000°F. Note:
“1500°F to 2100°F (EASA)” written beside options. - Turbo shaft and APU’s are equipped with can-type C.C.
- Hottest point in A.I.T.E.: (a) Compressor outlet (b) Combustion chamber (c) Turbine nozzle (d) Turbine outlet
blades. - Nozzle vanes constructed hollow: (a) To reduce engine weight (b) For better cooling.
- If the turbine casing is designed support direct or cold wall, * support to rotor. [Wording unclear.]
- Turbine blades elongation takes place due to: (a) Due to heat and centrifugal force (b) Due to heat and centrifugal
force. [Options appear identical.] - PROWS material for cooling called: (a) Transportation cooling (b) Transportation cooling only designed for NGV.
[Wording unclear.] - Borescope inspecting: (a) Has 2 different wands, both rigid and flexible to inspect internal area.
- Exhaust nozzles are supported by:
(a) Tail pipe
(b) Inner cone
(c) Extended tailpipe. - Max. exhaust gas velocity achieved at: (a) Direct
(b) Convergent
(c) Convergent-divergent. - After burners is used: (a) Increasing in temperature up to increased gas velocity.
- Destruction of soot occurs: (a) Through reverse selection [unclear].
- Turbines at idle: (a) Weighted on wheel (b) Both.
- Matrix support system (or) corrugated nozzle: (a) Matrix mechanical by attaching the design. [Wording unclear.]
- Turbine engine limiting: (a) Mixing of oxygen and nitrogen when exposed to heat (b) Nitrogen & oxygen explosive
packaged heat ince. [Wording unclear.] - Ball bearings theory: (a) Axial & radial load only (b) False load (c) Axial only (d) Radial only.
- Ball bearings are used: (a) Oil seals positioned (b) Prevent oil leak from normal flow path (c) To absorb leaked oil.
- In general ball bearings are used: (a) After minimum rotation resistance unclear Takes high loads (c) Easy
maintenance (d) All. - MTCS: (a) Double wall no blanking housing (b) Asm (CC) and supplying with cooling air in the interspace. 50. Turbine engine fuel are: (a) High viscosity, low volatility (b) Low volatility (c) Jet A (d) Jet A-1 (e) Gasoline.
- In the event of an engine seizure in turbo shaft engine, at what RPM spray clutch engage? (a) 100% (b) 50% (c)
200 RPM. - Oil feeding in the oil tank is removed by: (a) Deccler spelling unclear Centrifugal pump.
- Preventing microbes in aircraft fuel: (a) By providing water to enter fuel tanks (b) By adding fuel additives at the
time of filling (c) By adding fuel additives during fuel manufacturing process (d) With air to extract. - The fuel-filter can get clogged due to: (a) Particles filling to filter elements.
- The main difference between pressure relief system, fuel flow system and total loss system: (a) Oil pressure supply
(b) Scavenge system (c) Oil flow need to be supplied. - Full flow oil system uses: (a) Small pump (b) Large pump (c) Large pump with relief system.
- Engine bearings are cooled by: (a) Ram air (b) Engine lubrication system (c) …
- A constant power can be achieved in flight by: (a) By maintaining constant reduction gear speed (b) Constant
engine speed (c) Constant propeller blade angle. - Overspeed Governor is a backup.
- The bypass valve bypasses the fuel in fuel control unit: (a) Across the fuel metering valve to supply constant fuel
(b) To supply constant fuel in fuel manifolds (c) To supply constant fuel in the combustion chamber. - Regarding oil seals: (a) Correct part number is to be checked and no nicks and scratches in the area of installation.
- Engine fuel systems main components: (a) HP-A/C fuel tank, LP fuel pump, FCOC, … (b) Engine HP main EDP,
HP filter, FCOC, FMU (c) Air in (b) + fuel nozzles. - Starting sequence:
(a) Starter, ignition, supply of fuel once the engine reaches sufficient speed. - The fuel/air combustion starter is combination of: (a) Small gas turbine engine (b) Combustion engine minus
combustion chamber (c) Combustion engine minus compressor. - High voltage is supplied to generation system: (a) To get high energy into a capacitor (b) To store the continuous
supply (c) … - Purpose of bleed resistor: (a) To bleed voltage during ignition system operation (b) To bleed residual voltage when
the system is shut off (c) To dissipate the residual charge which triggers capacitor (d) Between the completion of one
discharge at the spark ignition and the beginning of the next cycle. (Trigger 165) - Exhaust temperature is monitored to identify: (a) Heat in combustion chamber (b) Turbine case (c) IGV (d) Turbine
blades. All - Torquemeter provides oil pressure between: (a) RGB to propeller.
- Labyrinth seal purpose. [No options recorded.]
- APU priority: (i) Electrical output over pneumatic supply.
- ITT/ITPS is the source for engine starting on ground and in air.
- MTCS when pipelines are disconnected: (a) Blank them with suitable blankings or plugs (b) Remount cover with
3m tape [unclear]. - Tachometer indication is indicated: (a) Frequency produced by generator (b) Current produced by generator
master (c) Voltage by photo cell. - MTCS examination produced by: (a) Photoelectric when cannot be used to indicate the RPM with a current signal
(b) Indicated by current generated by generator which is supplied to synchronous motor in the indicating gauge. - Trimming is done: (a) Idle RPM (b) Max. RPM (c) Cut-off idle and max RPM adjustments.
- EGT harnesses connected one end up to: (a) LWR/LRR Ride → dual fuel quantity sensor signal receive??
[unclear]. - FADEC System: (a) Reduces crew load (b) Saves fuel (c) … (d) All.
- In APUs surge and stall prevention in the compressor is accomplished by: (a) ICV (b) VSV (c) ICV and surge valve.
- The educator is a duct used in APU to: (a) Better cooling (b) … (c) …
- When right engine on fire: (a) One light will be displayed in cockpit (b) Master S/O is on (c) Selecting the S/W will
extinguish the fire bottle (d) All. - Funsall detects one fault at a time and spot detects are connected in parallel. [Spelling/wording unclear.]
- MTTS Fire System testing switches located in cockpit and can be tested both on ground and in flight as well.
- During starting it is necessary to monitor: (a) Tachometer (b) Oil P3? (c) EGT (d) All.
- If fire warning light illuminated, MCB on engine which the fire is reported. [Question incomplete.]
- When engine operated at above 85% RPM for 1 minute it is recommended to run the engine before cut off: (a) 1
min (b) 2 min (c) Min – 5 min. - Spectrometric oil analysis programme tells about: (a) Condition of engine lubricating oil.
- Engine rear mounts safety: (a) Vertical, torque and axial loads (b) Vertical and side loads only.
- An installed engine need to be re-pressured at: (a) 6 weeks (b) 1 month (c) 6 month (d) 1 year.
- Protective envelope gradually sealed: (a) Vacuum (b) Silica gel (c) …
- Engine in storage: (a) Must be checked for
immediately indicated next abnormal feature after 24 hrs. - Circuit breaker question which disengages when one input supply is back … [Question incomplete.]
- IEPR indicates: (a) Average Integrated Engine per ratio of deducted exhaust and cafe exhaust to inlet P.E.
[Wording unclear.]
Disclaimer: Memory-Based Content, The questions provided herein are compiled based on the memory recalls of candidates who appeared for the exam.
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