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MCQs

Total Questions : 1187 | Page 8 of 119 pages
Question 71. The rate of change of displacement of a body is called
  1.     Velocity
  2.     Acceleration
  3.     Momentum
  4.     None of these
 Discuss Question
Answer: Option A. ->  Velocity
Question 72. A machine having an efficiency less than 50%, is known as
  1.     Reversible machine
  2.     Non-reversible machine
  3.     Neither reversible nor non-reversible machine
  4.     Ideal machine
 Discuss Question
Answer: Option B. ->  Non-reversible machine
Question 73. If three forces acting in different planes can be represented by a triangle, these will be in
  1.     Non-equilibrium
  2.     Partial equilibrium
  3.     Full equilibrium
  4.     Unpredictable
 Discuss Question
Answer: Option A. ->  Non-equilibrium
Question 74. A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. the center of gravity of the section will lie
  1.     In the shaded area
  2.     In the hole
  3.     At ‘O’
  4.     None of these
 Discuss Question
Answer: Option A. ->  In the shaded area
Question 75. A screw jack used for lifting the loads is
  1.     A reversible machine
  2.     A non-reversible machine
  3.     An ideal machine
  4.     None of these
 Discuss Question
Answer: Option B. ->  A non-reversible machine
Question 76. A framed structure is perfect if it contains members equal to (where, n = number of joints in a frame)
  1.     2n³
  2.     2n
  3.     n²
  4.     3n²
 Discuss Question
Answer: Option A. ->  2n³
Question 77. The centre of gravity of a uniform lamina lies at
  1.     The centre of heavy portion
  2.     The bottom surface
  3.     The midpoint of its axis
  4.     All of the above
 Discuss Question
Answer: Option C. ->  The midpoint of its axis
Question 78. The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.
  1.     Less than
  2.     More than
  3.     Equal to
  4.     None of These
 Discuss Question
Answer: Option B. ->  More than
Question 79. Which of the following statement is correct?
  1.     The kinetic energy of a body during impact remains constant
  2.     The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact
  3.     The kinetic energy of a body before impact is less than the kinetic energy of a body after impact
  4.     The kinetic energy of a body before impact is more than the kinetic energy of a body after impact
 Discuss Question
Answer: Option D. ->  The kinetic energy of a body before impact is more than the kinetic energy of a body after impact
Question 80. Which of the following is a vector quantity?
  1.     Energy
  2.     Mass
  3.     Momentum
  4.     Angle
 Discuss Question
Answer: Option C. ->  Momentum

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