Mechanical Engineering MCQs

31. Which of the following is a type of thermal insulation?
A. Fiberglass
B. Wood
C. Metal
D. Concrete
32. What is the main purpose of a valve in a piping system?
A. To control flow
B. To increase pressure
C. To reduce temperature
D. To store fluid
33. Which of the following is a common type of hydraulic fluid?
A. Water
B. Oil
C. Air
D. Gas
34. What is the primary purpose of a compressor?
A. To increase pressure
B. To decrease pressure
C. To store energy
D. To regulate temperature
35. Which of the following is a type of mechanical failure?
A. Fatigue
B. Creep
C. Fracture
D. All of the above
36. What is the primary purpose of a spring?
A. To store energy
B. To absorb shock
C. To provide tension
D. All of the above
37. Which of the following is a type of energy conversion?
A. Mechanical to electrical
B. Electrical to thermal
C. Chemical to mechanical
D. All of the above
38. What is the primary purpose of a fan?
A. To cool
B. To heat
C. To circulate air
D. All of the above
39. Which of the following is a type of mechanical advantage?
A. Lever
B. Pulley
C. Inclined plane
D. All of the above
40. What is the primary purpose of a brake?
A. To increase speed
B. To decrease speed
C. To stop motion
D. To regulate temperature