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