Q1.
A knife edge seal is used to
a. Reduce pressure variation in cavity
b. Stop leakage-ans
c. Avoid thermal leakage
d. Is used as a support
ANS: b
Q2. A brad able coating are used for
a. Maintaining clearance between the rotating components and casing/seals
b. To provide heat insulation for the component
c. Both Option (A) and (B)-ans
d. None of the above
ANS: c
Q3. Advantage of Titanium alloys are
1.Low density and possess good corrosion resistance property
2.High Specific strength
3.suitable for high temperature operation
a.Option 1 and 2
b.option 1 and 3
c.Option 2 and 3
d.All the above
ANS:
Q4. By pass ratio is defined as
a .Ratio of core air to bypass air
b. Ratio of bypass air to core air
c. Ratio of total air mass flow to bypass air
d .None of the above
ANS:
Q5. During the normal start of a gas turbine engine
a .The starter alone is used
b. Starter and ignition system are used simultaneous
c. Ignition system alone is used
d. None of the above
ANS:
Q6. Engine vibrations refer to
a. Whirling of shaft
b. Bucking of shaft
c .Movement of the shaft in the axial direction
d. None of these
ANS: a
Q7. High Pressure Turbine blades are cooled using air from
a. Ambient atmosphere
b. High Pressure Compressor
c. Low Pressure Compressor
d. None of the above
ANS:
Q8. Eddy current inspection is performed
a. For subsurface cracks
b .For surface cracks
c. For nicks and scratches
d. For composite materials
ANS:
Q9. "Most common type of bearing used in a gas turbine engine are
a. ball bearing
b. roller bearings
c. plane bearing
a. Option 1 and 2
b. Option 1 and 3
c. Option 2 and 3
d. All the above
ANS: c
Q10."Air worthiness Directive
1. Requires mandatory compliance
2. Compliance is based on Operator policy
3. Is issued by Airworthiness Authority
a. Option 1 and 2
b. Option 1 and 3
c. Option 2 and 3
d. All the above
ANS:
Q11. Advantage of shrouded High Pressure Turbine blades is
a.It improves Engine Performance
b.It reduces vibrations
c.Both 1 and 2 above
d.None of these
ANS:
Q12.A high Pressure compressor Blade is found to have a crack near the root
a. The blade has to be rejected for further operation as root is a high stress
area
b. The blade is accepted bal for further service operation
c. Compressor blades can never develop cracks at the root
d. None of the above is correct
ANS: a
Q13. A Blisk is a
a. Bladed Disc-ans
b. Bladed drum
c. Location where shaft meets the disc
d. None of these
ANS: a
Q14. Advantage of composite are
a. Composite provides strengths similar to metal
components
b. Light in weight-ans
c. Act as noise suppression mechanism
d .All of the above
ANS: b
Q15. During Compression process the pressure and temperature of air
a .Increase-ans
b. Decrease.
c. Initially increase and then decrease
d .None of these
ANS: a
Q16. Balance correction is done by
a. Re-distribution of weight
b. Addition of weight
c. Removal of weight
d .All the above
ANS: d
Q17. High by pass ratio engines give
a. High specific thrust
b .Low specific thrust
c .Constant specific thrust
d. None of the above
ANS:
Q18. Modular engine architecture reduces
a. Overhaul burden
b .Line maintenance burden
c. Cost of Ownership
d. None of the above
ANS:
Q19. Annular Combustor has
a. More pressure loss
b. Less combustion efficiency
c. Less heat release for a given volume
d .Less pressure loss
ANS:
Q20. Centrifugal force is directed
a. Towards the center
b. Away from center
c. Perpendicular to the radius of the circle
d. None of the above
ANS:
Q1. Shot-peening is a process used for introducing a
a. compressive surface layer
b. Use a hardening coating to improve metal properties
c. Reduce metal surface imperfection by machining
d. Is the process of coating with a anti-corrosive paint
ANS:
Q2. The Oil system in Turbofan engine has the following roles
a. It cools the bearing and spline
b. It lubricates bearings and spline
c. Both 1 and 2
d. None of these
ANS:
Q3. Variable geometry inlet duct are used on supersonic aircrafts for
a. Slowing the airflow to subsonic speeds at the face of the compressor and
increase static pressure
b .accelerating the airflow, to supersonic speeds, during cruising flisht
c. Increasing the airflow, at outlet end of compressor
d. None of these
ANS:
Q4. What are the metal removal techniques
a. Ultra High Pressure jet Machining
b. Electro Discharge Machining
c. elecctro Chemical Machining
ANS:
Q5. Why do we need to to do Inspection
1.To determine whether the component is serviceable
2.To restore Fit,Form and Function of the component
3.To determine whether the component is repairable
a.Option 1 and 2
b.Option 1 and 3
c.Option 2 and 3
d All the above
ANS:
Q6. Full Authority Digital Engine Control (FADEC)system
a. Decrease the Fault detection capability of the engine
b. Has no effect on Fault detection capability of the engine
c. Increase the fault detection capability of the engine
d. None of the above
ANS:
Q7. The surge magic of Centrifugal compressor is----than that of an Axial
compressor
a.More
b.Less
c.Equal
d.Not adequate
ANS:
Q8. In normal flight conditions, an increase in aircraft speed
a. Cause the nose of the aircraft to drop
b. Cause the nose of the aircraft to lift
c. The nose remains in the same position
d. None of these
ANS:
Q9. With increasing altitude pressure decrease and
a.Temperature decreases at the same rate as pressure reduces
b.Temperature decreases but at a lower rate than
c. Temperature remains constant to 8000 ft
d. None of these
ANS:
Q10. Longitudinal stability is given by
a. The fin
b. the wing dihedral
c. the horizontal tail plane
d. None of the above
ANS:
Q11. What are the types of rivets that are used in Aerospace Industry
a.Solid river
b.Hollow river
c.Blind river
a.Option 1 and 2
b.Option 1 and 3
c.Option 2 and 3
d. All the above
ANS:
Q12. During a glide the following forces act on an aircraft
a.lift,weight,thrust
b.Lift.drag,weight
c.Lift and weight only
d.None of the these
ANS:
Q13. Which of the following properties makes titanium ideal for fan baldes
a. It is very light
b. It is very leap
c. It is silver coloured
d. all the above
ANS:
Q14. What are the metal joining techniques
a. Welding
b. Brazing
c. Thermal spray Technique
d. Mechanical Fastner
a. Option 1,2 and 3
b. Option 2,3 and 4
c. Option 1,2 and 4
d. All the above
ANS:
Q15. The Thermal Expansion of the Turbine casting is controlled throughout
the cycle to
a. Maintain optimum clearance between Blade tip and case
b. To relieve the stresses developed in the casing
c. To support Engine Health Monitoring
d. To reduce Turbine speed
ANS:
Q16. The component used for transferring axial thrust form a rotating
component to a static component is
a. Roller Bearing
b.Thrust Bearing
c. Ball Bearing
d. Both 2 and 3 above
ANS:
Q17. The boundary layer is
a. Thicker at the leading edge
b. Thickest at the trailing edge
c. Constant thickness from leading to trailing edges
d. None of the above
ANS:
Q16. Additional thrust is required for
a. Landing
b. Acceleration and climb
c. Decelerating aircraft
d. Cruise
ANS:
Q18. With increase in pressure ration the specific fuel consumption
a.Increase
b.Decrease
c.remains constant
d.None of the above
ANS:
Q19. An aircraft which is longitudinally stable, will tend to return to level
flight after a movement about which axis
a.Pitch
b.Roll
c.Yaw
d.All the above
ANS:
Q20. To ensure component integrity,types of Inspection Techniques used is
a.Visual inspection
b.Dimensional inspection
c. Non destructive Inspection
d. All the of the above
ANS:
Q21. Rotating stall,surge and flutter can be overcome by the
a. Variable stater Vanes
b. Introducing inter-stage bleed
c. Both the above
d. None of the above
ANS:
Q22. Radiographic examination is performed
1.To identify the cracks
2.Ti identify internal defects component
3.To identify the defects in magnetic material
a.Option 1 and 2
b.Option 1 and 3
c.Option 2 and 3
d. all the above
ANS:
Q23. Specific Fuel consumption (SFC) is ratio of
a. Fuel Flow rate/Thrust
b.Thrust/Fuel/Flow rate
c.Thrust/Air mass flow rate
d. None of the above
ANS:
Q1. Advantage of composite are
a. Composite provides strengths similar to metal components
b. Light in weight-ans
c. Act as noise suppression mechanism
d .All of the above
ANS:
Q2. Advantage of Titanium alloys are
1. Low density and possess good corrosion resistance property
2. High Specific strength
3. suitable for high temperature operation
a.Option 1 and 2
b.option 1 and 3
c.Option 2 and 3
d.All the above
ANS:
Q3. Balance correction is done by
a. Re-distribution of weight
b. Addition of weight
c. Removal of weight
d .All the above
ANS:
Q4. By pass ratio is defined as
a. Ratio of core air to bypass air
b. Ratio of bypass air to core air
c. Ratio of total air mass flow to bypass air
d. None of the above
ANS:
Q5. Engine vibrations refer to
a. Whirling of shaft
b. Bucking of shaft
c .Movement of the shaft in the axial direction
d. None of these
ANS:
Q6. A Blisk is a
a. Bladed Disc-ans
b. Bladed drum
c. Location where shaft meets the disc
d .None of these
ANS:
Q7. "Most common type of bearing used in a gas turbine engine are
a.ball bearing
b.roller bearings
c.plane bearing
a.Option 1 and 2
b.Option 1 and 3
c.Option 2 and 3
d. All the above
ANS:
Q8. A knife edge seal is used to
a. Reduce pressure variation in cavity
b. Stop leakage-ans
c. Avoid thermal leakage
d. Is used as a support
ANS:
Q9. Eddy current inspection is performed
a. For subsurface cracks
b .For surface cracks
c. For nicks and scratches
d. For composite materials
ANS:
Q10. Centrifugal force is directed
a. Towards the center
b. Away from center
c. Perpendicular to the radius of the circle
d. None of the above
ANS:
Q11. Annular Combustor has
a. More pressure loss
b.Less combustion efficiency
c. Less heat release for a given volume
d .Less pressure loss
ANS:
Q12."Air worthiness Directive
1.Requires mandatory compliance
2.Compliance is based on Operator policy
Is issued by Airworthiness Authority
a.Option 1 and 2
b.Option 1 and 3
c.Option 2 and 3
d.All the above
ANS:
Q13. Advantage of shrouded High Pressure Turbine blades is
a. It improves Engine Performance
b. It reduces vibrations
c. Both 1 and 2 above
d. None of these
ANS:
Q14. A high Pressure compressor Blade is found to have a crack near the root
a. The blade has to be rejected for further operation as root is a high stress
area
b. The blade is accepted bal for further service operation
c. Compressor blades can never develop cracks at the root
d. None of the above is correct
ANS:
Q15. During the normal start of a gas turbine engine
a.The starter alone is used
b. Starter and ignition system are used simultaneous
c. Ignition system alone is used
d. None of the above
ANS:
Q16. A bradable coating are used for
a. Maintaining clearance between the rotating components and casing/seals
b.To provide heat insulation for the component
c. Both Option (A) and (B)-ans
d. None of the above
ANS:
Q17. High by pass ratio engines give
a. High specific thrust
b .Low specific thrust
c .Constant specific thrust
d. None of the above
ANS:
Q18. Modular engine architecture reduces
a. Overhaul burden
b. Line maintenance burden
c. Cost of Ownership
d. None of the above
ANS:
Q19. During Compression process the pressure and temperature of air
a. Increase-ans
b. Decrease.
c. Initially increase and then decrease
d. None of these
ANS:
Q20. High Pressure Turbine blades are cooled using air from
a. Ambient atmosphere
b. High Pressure Compressor
c. Low Pressure Compressor
d. None of the above
ANS:
