Q1. Which type of material has the highest Young's modulus?
Steel
Aluminum
Copper
Titanium
Q2. Which law states that the pressure of a gas is directly proportional to its temperature?
Gay-Lussac’s law
Charles’s law
Boyle’s law
Avogadro’s law
Q3. Which type of compressor is more efficient at higher pressure ratios?
Screw compressor
Axial compressor
Centrifugal compressor
Reciprocating compressor
Q4. Which type of fluid flow is characterized by constant velocity and pressure?
Turbulent flow
Transitional flow
Laminar flow
None of the above
Q5. What is the difference between a motor and an engine?
A motor converts electrical energy into mechanical energy, while an engine converts fuel into mechanical energy.
An engine converts electrical energy into mechanical energy, while a motor converts fuel into mechanical energy.
Both are the same.
None of the above.
Q6. 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.
None of the above.
A gasket prevents fluid leakage between two stationary surfaces, while a seal prevents fluid leakage between two moving surfaces.
Q7. Which type of bearing uses rolling elements?
Rolling element bearing
Magnetic bearing
Plain bearing
Fluid bearing
Q8. Which type of fluid flow is characterized by chaotic movement and irregular eddies?
Transitional flow
None of the above
Turbulent flow
Laminar flow
Q9. 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
Q10. Which type of bearing is commonly used in high-speed applications?
Plain bearing
Rolling element bearing
Fluid bearing
Magnetic bearing
Q11. 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.
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.
Q12. Which type of welding uses a consumable electrode?
Stick welding
MIG welding
Laser welding
TIG welding
Q13. 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.
Q14. Which type of bearing is commonly used in low-speed and heavy-load applications?
Fluid bearing
Plain bearing
Magnetic bearing
Rolling element bearing
Q15. Which type of machining operation produces a smooth surface finish?
Boring
Grinding
Turning
Milling
Q16. 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.
Q17. Which type of heat exchanger has the highest heat transfer coefficient?
Plate heat exchanger
Double-pipe heat exchanger
Shell and tube
Finned tube heat exchanger
Q18. Which type of material has the highest tensile strength?
Copper
Titanium
Aluminum
Steel
Q19. Which type of pump is commonly used in high-pressure applications?
Positive displacement pump
Centrifugal pump
Mixed flow pump
Axial flow pump
Q20. Which type of turbine is used in a gas turbine engine?
Impulse turbine
Reaction turbine
Both
None of the above
Q21. What is the difference between stress and strain?
None of the above.
Stress is the amount of deformation that occurs as a result of the applied force.
Strain is the amount of force applied per unit area.
Both are the same.
Q22. What is the difference between ductile and brittle materials?
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.
Both are the same.
None of the above.
Q23. 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
Q24. What is the difference between a shaft and an axle?
Both are the same.
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.
A shaft transmits power from one component to another, while an axle supports and rotates a wheel or other rotating component.
Q25. What is the function of a gearbox?
None of the above
To convert electrical energy to mechanical energy
To transmit power between the engine and the wheels
To store energy for later use
Q26. Which type of compressor is commonly used in refrigeration systems?
Reciprocating compressor
Screw compressor
Centrifugal compressor
Scroll compressor
Q27. Which type of gear is used to transmit power between two non-parallel shafts?
Spur gear
Bevel gear
Worm gear
Helical gear
Q28. What is the difference between torque and power?
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.
Torque is the force that causes rotation, while power is the rate at which work is done.
Q29. Which type of gear is used to change the direction of rotation?
Bevel gear
Worm gear
Helical gear
Spur gear