Q1. What is the difference between torque and power?
Power is the force that causes rotation, while torque is the rate at which work is done.
Both are the same.
None of the above.
Torque is the force that causes rotation, while power is the rate at which work is done.
Q2. Which type of bearing is commonly used in low-speed and heavy-load applications?
Rolling element bearing
Fluid bearing
Plain bearing
Magnetic bearing
Q3. Which type of welding uses a consumable electrode?
Laser welding
TIG welding
Stick welding
MIG welding
Q4. What is the difference between an open loop and a closed loop control system?
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.
Both are the same.
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.
Q5. Which type of turbine is used in a gas turbine engine?
Impulse turbine
Reaction turbine
None of the above
Both
Q6. What is the function of a gearbox?
To convert electrical energy to mechanical energy
To store energy for later use
None of the above
To transmit power between the engine and the wheels
Q7. Which type of bearing uses rolling elements?
Plain bearing
Fluid bearing
Magnetic bearing
Rolling element bearing
Q8. What is the difference between a screw and a bolt?
None of the above.
A bolt is threaded all the way to the head, while a screw has a smooth shank.
A screw is threaded all the way to the head, while a bolt has a smooth shank.
Both are the same.
Q9. Which type of fluid flow is characterized by constant velocity and pressure?
Laminar flow
Transitional flow
None of the above
Turbulent flow
Q10. What is the difference between stress and strain?
Stress is the amount of deformation that occurs as a result of the applied force.
None of the above.
Strain is the amount of force applied per unit area.
Both are the same.
Q11. Which type of compressor is more efficient at higher pressure ratios?
Reciprocating compressor
Axial compressor
Centrifugal compressor
Screw compressor
Q12. What is the difference between a motor and an engine?
None of the above.
An engine converts electrical energy into mechanical energy, while a motor converts fuel into mechanical energy.
Both are the same.
A motor converts electrical energy into mechanical energy, while an engine converts fuel into mechanical energy.
Q13. Which type of material has the highest Young's modulus?
Copper
Titanium
Aluminum
Steel
Q14. Which type of cooling system uses air to dissipate heat from an engine?
Hybrid cooling system
Liquid cooling system
Air cooling system
None of the above
Q15. Which type of fluid flow is characterized by chaotic movement and irregular eddies?
Transitional flow
Laminar flow
Turbulent flow
None of the above
Q16. Which law states that the pressure of a gas is directly proportional to its temperature?
Charles’s law
Boyle’s law
Gay-Lussac’s law
Avogadro’s law
Q17. Which type of gear is used to change the direction of rotation?
Worm gear
Spur gear
Bevel gear
Helical gear
Q18. Which type of material has the highest tensile strength?
Titanium
Copper
Aluminum
Steel
Q19. Which type of bearing is commonly used in high-speed applications?
Magnetic bearing
Plain bearing
Fluid bearing
Rolling element bearing
Q20. Which type of machining operation produces a smooth surface finish?
Boring
Grinding
Milling
Turning
Q21. Which type of gear is used to transmit power between two non-parallel shafts?
Helical gear
Bevel gear
Worm gear
Spur gear
Q22. Which type of pump is commonly used in high-pressure applications?
Centrifugal pump
Axial flow pump
Positive displacement pump
Mixed flow pump
Q23. What is the difference between ductile and brittle materials?
Brittle materials can be bent and stretched without breaking, while ductile materials break easily when subjected to stress.
None of the above.
Both are the same.
Ductile materials can be bent and stretched without breaking, while brittle materials break easily when subjected to stress.
Q24. What is the function of a flywheel?
To reduce friction between moving parts
To increase the power output of an engine
To store energy and smooth out fluctuations in speed
None of the above
Q25. What is the difference between a gasket and a seal?
A seal prevents fluid leakage between two stationary surfaces, while a gasket prevents fluid leakage between two moving surfaces.
None of the above.
Both are the same.
A gasket prevents fluid leakage between two stationary surfaces, while a seal prevents fluid leakage between two moving surfaces.
Q26. Which type of heat exchanger has the highest heat transfer coefficient?
Plate heat exchanger
Finned tube heat exchanger
Shell and tube
Double-pipe heat exchanger
Q27. What is the difference between a valve and a damper?
A valve regulates the flow of fluid, while a damper regulates the flow of air.
Both are the same.
A damper regulates the flow of fluid, while a valve regulates the flow of air.
None of the above.
Q28. What is the difference between a shaft and an axle?
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.
Both are the same.
None of the above.
Q29. Which type of compressor is commonly used in refrigeration systems?
Screw compressor
Scroll compressor
Reciprocating compressor
Centrifugal compressor