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