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