Mechanical Engineering MCQs

121. What is the primary function of a pushrod in an engine?
A. To transfer motion from camshaft to rocker arm
B. To increase torque
C. To reduce friction
D. To control speed
122. Which of the following is a type of mechanical alignment?
A. Shaft alignment
B. Belt alignment
C. Gear alignment
D. All of the above
123. What is the primary purpose of a thermal barrier coating?
A. To reduce heat transfer
B. To increase heat transfer
C. To store heat
D. To generate heat
124. Which of the following is a type of mechanical resonance?
A. Forced resonance
B. Natural resonance
C. Damped resonance
D. All of the above
125. What is the primary function of a variable valve timing system in an engine?
A. To optimize valve timing
B. To increase torque
C. To reduce friction
D. To control speed
126. Which of the following is a type of mechanical fatigue?
A. High-cycle fatigue
B. Low-cycle fatigue
C. Thermal fatigue
D. All of the above
127. What is the primary purpose of a torsional damper in an engine?
A. To reduce torsional vibrations
B. To increase torque
C. To control speed
D. To reduce friction
128. Which of the following is a type of mechanical pump?
A. Diaphragm pump
B. Piston pump
C. Vane pump
D. All of the above
129. What is the primary function of a tappet in an engine?
A. To transfer motion from cam to valve
B. To increase torque
C. To reduce friction
D. To control speed
130. Which of the following is a type of mechanical seal failure?
A. Leakage
B. Wear
C. Thermal degradation
D. All of the above