Dynamics of Machines MCQs | Page - 14

Dear candidates you will find MCQ questions of Dynamics of Machines here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

📊 Dynamics of Machines
Q. The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a right turn. The effect of gyroscopic couple acting on it will be to raise the stern and lower the bow.
  • (A) true
  • (B) false
  • (C) ---
  • (D) ---
💬 Discuss
✅ Correct Answer: (A) true
📊 Dynamics of Machines
Q. The pitching of a ship is assumed to take place with simple harmonic motion.
  • (A) true
  • (B) false
  • (C) ---
  • (D) ---
💬 Discuss
✅ Correct Answer: (A) true
📊 Dynamics of Machines
Q. When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
  • (A) to move the ship towards star-board
  • (B) to move the ship towards port side
  • (C) to raise the bow and lower the stern
  • (D) to raise the stern and lower the bow
💬 Discuss
✅ Correct Answer: (A) to move the ship towards star-board
📊 Dynamics of Machines
Q. It is required to lift water at the top of a high building at the rate of 50 litres/min. Assuming the losses due to friction equivalent to 5 m and those due to leakage equal to 5 m head of water, efficiency of pump 90%, decide the kilowatt capacity of motor required to drive the pump.
  • (A) 0.102 kw
  • (B) 0.202 kw
  • (C) 0.302 kw
  • (D) 0.402 kw
💬 Discuss
✅ Correct Answer: (C) 0.302 kw
📊 Dynamics of Machines
Q. Power is transmitted by an electric motor to a machine by using a belt drive. The tensions on the tight and slack side of the belt are 2200 N and 1000 N respectively and diameter of the pulley is 600 mm. If speed of the motor is 1500 r.p.m, find the power transmitted.
  • (A) 46.548 kw
  • (B) 56.548 kw
  • (C) 66.548 kw
  • (D) 76.548 kw
💬 Discuss
✅ Correct Answer: (B) 56.548 kw
📊 Dynamics of Machines
Q. The flywheel of an engine has a mass of 200 kg and radius of gyration equal to 1 m. The average torque on the flywheel is 1200 Nm. Find the angular acceleration of flywheel and the angular speed after 10 seconds starting from rest.
  • (A) 3 rad/s
  • (B) 4 rad/s
  • (C) 5 rad/s
  • (D) 6 rad/s
💬 Discuss
✅ Correct Answer: (D) 6 rad/s
📊 Dynamics of Machines
Q. Calculate the work done per minute by a punch tool making 20 working strokes per min when a 30 mm diametre hole is punched in 5 mm thick plate with ultimate shear strength og 450 Mpa in each stroke.
  • (A) 10.69 knm
  • (B) 20.69 knm
  • (C) 30.69 knm
  • (D) 40.69 knm
💬 Discuss
✅ Correct Answer: (A) 10.69 knm

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