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MCQs

Total Questions : 543 | Page 11 of 55 pages
Question 101. The advantage of the piston valve over the slide valve is that in the former case
  1.    Wear is less
  2.    Power absorbed is less
  3.    Both wear and power absorbed are low
  4.    The pressure developed being high provides tight sealing
 Discuss Question
Answer: Option C. -> Both wear and power absorbed are low
Question 102. Which of the following is false statement in respect of differences between machine and structure?
  1.    Machines transmit mechanical work, whereas structures transmit forces
  2.    In machines, relative motion exists between its members, whereas same does not exist in case of structures
  3.    Machines modify movement and work, whereas structures modify forces
  4.    Efficiency of machines as well as structures is below 100 %
 Discuss Question
Answer: Option D. -> Efficiency of machines as well as structures is below 100 %
Question 103. The approximate straight line mechanism is a
  1.    Four bar linkage
  2.    6 bar linkage
  3.    8 bar linkage
  4.    3 bar linkage
 Discuss Question
Answer: Option A. -> Four bar linkage
Question 104. When a slider moves on a fixed link having curved surface, their instantaneous centre lies
  1.    On their point of contact
  2.    At the centre of curvature
  3.    At the centre of circle
  4.    At the pin joint
 Discuss Question
Answer: Option B. -> At the centre of curvature
Question 105. When two links are connected by a pin joint, their instantaneous center lies
  1.    On their point of contact
  2.    At the center of curvature
  3.    At the center of circle
  4.    At the pin joint
 Discuss Question
Answer: Option D. -> At the pin joint
Question 106. If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
  1.    Stable
  2.    Unstable
  3.    Isochronous
  4.    None of these
 Discuss Question
Answer: Option C. -> Isochronous
Question 107. When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
  1.    Stable
  2.    Unstable
  3.    Isochronous
  4.    Hunt
 Discuss Question
Answer: Option D. -> Hunt
Question 108. A single degree of freedom system is given by, $$m \times \frac{{{d^2}x}}{{d{t^2}}} + c \times \frac{{dx}}{{dt}} + sx = F\cos \omega t$$       with usual notations. It represents
  1.    Free vibration with damping
  2.    Free vibration without damping
  3.    Forced vibration with damping
  4.    Forced vibration without damping
 Discuss Question
Answer: Option C. -> Forced vibration with damping
Question 109. A mechanism _________ for transmitting or transforming motion.
  1.    Can be used
  2.    Can not be used
  3.    Unpredictable
  4.    None of these
 Discuss Question
Answer: Option A. -> Can be used
Question 110. The motion between a pair which takes place in __________ is known as incompletely constrained motion.
  1.    One direction only
  2.    Two directions only
  3.    More than one direction
  4.    None of these
 Discuss Question
Answer: Option C. -> More than one direction

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