Mechanical Engineering MCQs

21. Which of the following is a non-renewable energy source?
A. Solar
B. Wind
C. Natural Gas
D. Hydro
22. What is the primary function of a piston in an engine?
A. To compress air
B. To ignite fuel
C. To convert linear motion to rotary motion
D. To regulate temperature
23. Which type of welding uses a filler material?
A. Arc welding
B. Gas welding
C. MIG welding
D. All of the above
24. What is the main purpose of a clutch in a vehicle?
A. To increase speed
B. To reduce speed
C. To engage and disengage power
D. To regulate temperature
25. Which of the following is a measure of a material's resistance to deformation?
A. Elasticity
B. Plasticity
C. Hardness
D. Ductility
26. What is the primary purpose of a radiator in a vehicle?
A. To cool the engine
B. To heat the cabin
C. To store coolant
D. To filter air
27. Which of the following is a common type of pump?
A. Centrifugal pump
B. Reciprocating pump
C. Gear pump
D. All of the above
28. What is the primary function of a gearbox?
A. To increase torque
B. To reduce speed
C. To change the direction of rotation
D. All of the above
29. Which of the following is a type of composite material?
A. Concrete
B. Steel
C. Aluminum
D. Copper
30. What is the primary purpose of a turbine?
A. To convert thermal energy to mechanical energy
B. To convert mechanical energy to electrical energy
C. To store energy
D. To regulate temperature