Q1. Which type of compressor is more efficient at higher pressure ratios?
Axial compressor
Reciprocating compressor
Centrifugal compressor
Screw compressor
Q2. What is the function of a gearbox?
None of the above
To store energy for later use
To convert electrical energy to mechanical energy
To transmit power between the engine and the wheels
Q3. What is the difference between stress and strain?
Strain is the amount of force applied per unit area.
Stress is the amount of deformation that occurs as a result of the applied force.
None of the above.
Both are the same.
Q4. Which type of gear is used to change the direction of rotation?
Helical gear
Spur gear
Bevel gear
Worm gear
Q5. What is the difference between a shaft and an axle?
Both are the same.
A shaft transmits power from one component to another, while an axle supports and rotates a wheel or other rotating component.
An axle transmits power from one component to another, while a shaft supports and rotates a wheel or other rotating component.
None of the above.
Q6. What is the difference between a motor and an engine?
None of the above.
A motor converts electrical energy into mechanical energy, while an engine converts fuel into mechanical energy.
Both are the same.
An engine converts electrical energy into mechanical energy, while a motor converts fuel into mechanical energy.
Q7. Which type of bearing is commonly used in high-speed applications?
Fluid bearing
Magnetic bearing
Plain bearing
Rolling element bearing
Q8. What is the difference between a gasket and a seal?
Both are the same.
A seal prevents fluid leakage between two stationary surfaces, while a gasket prevents fluid leakage between two moving surfaces.
A gasket prevents fluid leakage between two stationary surfaces, while a seal prevents fluid leakage between two moving surfaces.
None of the above.
Q9. Which type of fluid flow is characterized by constant velocity and pressure?
Turbulent flow
None of the above
Laminar flow
Transitional flow
Q10. Which type of material has the highest tensile strength?
Steel
Aluminum
Titanium
Copper
Q11. Which type of machining operation produces a smooth surface finish?
Boring
Turning
Grinding
Milling
Q12. Which type of fluid flow is characterized by chaotic movement and irregular eddies?
Transitional flow
None of the above
Laminar flow
Turbulent flow
Q13. What is the difference between an open loop and a closed loop control system?
Both are the same.
An open loop control system does not have a feedback loop, while a closed loop control system uses a feedback loop to adjust the output.
A closed loop control system does not have a feedback loop, while an open loop control system uses a feedback loop to adjust the output.
None of the above.
Q14. Which type of bearing is commonly used in low-speed and heavy-load applications?
Magnetic bearing
Rolling element bearing
Fluid bearing
Plain bearing
Q15. What is the difference between ductile and brittle materials?
None of the above.
Brittle materials can be bent and stretched without breaking, while ductile materials break easily when subjected to stress.
Both are the same.
Ductile materials can be bent and stretched without breaking, while brittle materials break easily when subjected to stress.
Q16. Which type of gear is used to transmit power between two non-parallel shafts?
Worm gear
Helical gear
Bevel gear
Spur gear
Q17. Which type of welding uses a consumable electrode?
MIG welding
TIG welding
Stick welding
Laser welding
Q18. What is the difference between a valve and a damper?
A damper regulates the flow of fluid, while a valve regulates the flow of air.
None of the above.
Both are the same.
A valve regulates the flow of fluid, while a damper regulates the flow of air.
Q19. Which type of bearing uses rolling elements?
Plain bearing
Fluid bearing
Rolling element bearing
Magnetic bearing
Q20. Which law states that the pressure of a gas is directly proportional to its temperature?
Avogadro’s law
Gay-Lussac’s law
Boyle’s law
Charles’s law
Q21. What is the difference between torque and power?
Torque is the force that causes rotation, while power is the rate at which work is done.
Both are the same.
None of the above.
Power is the force that causes rotation, while torque is the rate at which work is done.
Q22. What is the function of a flywheel?
To increase the power output of an engine
To store energy and smooth out fluctuations in speed
To reduce friction between moving parts
None of the above
Q23. Which type of compressor is commonly used in refrigeration systems?
Centrifugal compressor
Screw compressor
Scroll compressor
Reciprocating compressor
Q24. Which type of material has the highest Young's modulus?
Aluminum
Steel
Copper
Titanium
Q25. Which type of heat exchanger has the highest heat transfer coefficient?
Double-pipe heat exchanger
Plate heat exchanger
Shell and tube
Finned tube heat exchanger
Q26. Which type of pump is commonly used in high-pressure applications?
Mixed flow pump
Centrifugal pump
Positive displacement pump
Axial flow pump
Q27. What is the difference between a screw and a bolt?
Both are the same.
A screw is threaded all the way to the head, while a bolt has a smooth shank.
A bolt is threaded all the way to the head, while a screw has a smooth shank.
None of the above.
Q28. Which type of cooling system uses air to dissipate heat from an engine?
Hybrid cooling system
Liquid cooling system
None of the above
Air cooling system
Q29. Which type of turbine is used in a gas turbine engine?
Reaction turbine
None of the above
Both
Impulse turbine