MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 606 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The acceleration of a particle moving with simple harmonic motion is __________ at themean position. |
| A. | zero |
| B. | minimum |
| C. | maximum |
| Answer» B. minimum | |
| 52. |
The velocity of a particle moving with simple harmonic motion is __________ at the mean position. |
| A. | zero |
| B. | minimum |
| C. | maximum |
| Answer» D. | |
| 53. |
A framed structure is imperfect, if the number of members are __________ (2 - 3). |
| A. | equal to |
| B. | less than |
| C. | greater than |
| D. | either (b) or (c) |
| Answer» E. | |
| 54. |
The linear acceleration () of a body rotating along a circular path of radius () with an angular acceleration of α rad / s, is |
| A. | = α/ |
| B. | = α. |
| C. | = |
| D. | / α |
| E. | none of these |
| Answer» C. = | |
| 55. |
The total energy possessed by a system of moving bodies |
| A. | is constant at every instant |
| B. | varies from point to point |
| C. | is maximum in the start and minimum at the end |
| D. | is minimum in the start and maximum at the end |
| Answer» B. varies from point to point | |
| 56. |
The moment of inertia of a solid cylinder of mass , radius and length about the longitudinal axis or polar axis is |
| A. | /2 |
| B. | /4 |
| C. | /6 |
| D. | /8 |
| Answer» B. /4 | |
| 57. |
The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 58. |
A couple produces |
| A. | translatory motion |
| B. | rotational motion |
| C. | combined translatory and rotational motion |
| D. | none of the above |
| Answer» C. combined translatory and rotational motion | |
| 59. |
Energy may be defined as the capacity of doing work. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 60. |
The resultant of the two forces and is R. If is doubled, the new resultant is perpendicular to . Then |
| A. | = |
| B. | = |
| C. | = 2 |
| D. | none of these |
| Answer» C. = 2 | |
| 61. |
Whenever a force acts on a body and the body undergoes a displacement, then |
| A. | work is said to be done |
| B. | power is being transmitted |
| C. | body has kinetic energy of translation |
| D. | none of these |
| Answer» B. power is being transmitted | |
| 62. |
When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 63. |
The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed. |
| A. | more |
| B. | less |
| Answer» B. less | |
| 64. |
The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where = Height of a right circular solid cone.) |
| A. | /2 |
| B. | /3 |
| C. | /4 |
| D. | /6 |
| Answer» D. /6 | |
| 65. |
In actual machines, mechanical advantage is __________ velocity ratio. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 66. |
The rate of change of displacement of a body is called |
| A. | velocity |
| B. | acceleration |
| C. | momentum |
| D. | none of these |
| Answer» B. acceleration | |
| 67. |
The efficiency of a screw jack is maximum, when(where α = Helix angle, and φ = Angle of friction.) |
| A. | α = 45° + φ/2 |
| B. | α = 45° - φ/2 |
| C. | α = 90° + φ |
| D. | α = 90° - φ |
| Answer» C. α = 90° + φ | |
| 68. |
The periodic time () is given by(where ω = Angular velocity of particle in rad / s.) |
| A. | ω/2π |
| B. | 2π/ω |
| C. | 2π x ω |
| D. | π/ω |
| Answer» C. 2π x ω | |
| 69. |
The centre of gravity of a hemisphere lies at a distance of 3 / 8 from its base measured along the vertical radius. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 70. |
The point, through which the whole weight of the body acts, irrespective of its position, is known as |
| A. | moment of inertia |
| B. | centre of gravity |
| C. | centre of percussion |
| D. | centre of mass |
| Answer» C. centre of percussion | |
| 71. |
The loss of kinetic energy during elastic impact is zero. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 72. |
The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ . |
| A. | less than |
| B. | greater than |
| Answer» B. greater than | |
| 73. |
The minimum force required to slide a body of weight on a rough horizontal plane is |
| A. | sin θ |
| B. | cos θ |
| C. | tan θ |
| D. | none of these |
| Answer» D. none of these | |
| 74. |
The moment of inertia of a square of side about its diagonal is |
| A. | /8 |
| B. | /12 |
| C. | /12 |
| D. | /16 |
| Answer» D. /16 | |
| 75. |
Which of the following is a scalar quantity? |
| A. | Force |
| B. | Speed |
| C. | Velocity |
| D. | Acceleration |
| Answer» C. Velocity | |
| 76. |
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as |
| A. | Newton's first law of motion |
| B. | Newton's second law of motion |
| C. | Newton's third law of motion |
| D. | none of these |
| Answer» C. Newton's third law of motion | |
| 77. |
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as |
| A. | coplaner concurrent forces |
| B. | coplaner non-concurrent forces |
| C. | non-coplaner concurrent forces |
| D. | none of these |
| Answer» E. | |
| 78. |
A non-reversible machine is also called a self-locking machine. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 79. |
The ideal angle of banking provided on the curves on roads depends upon |
| A. | weight of the vehicle |
| B. | (velocity) |
| C. | of the vehicle |
| D. | nature of the road surface |
| E. | coefficient of friction between the road and vehicle contact point |
| Answer» C. of the vehicle | |
| 80. |
If a pendulum is taken 1 km below the earth surface in a mine, it will __________ in time. |
| A. | gain |
| B. | loose |
| Answer» B. loose | |
| 81. |
The moment of inertia of a thin disc of mass and radius , about an axis through its centre of gravity and perpendicular to the plane of the disc is |
| A. | /2 |
| B. | /4 |
| C. | /6 |
| D. | /8 |
| Answer» B. /4 | |
| 82. |
A machine which is capable of doing work in the reversed direction, after the effort is removed, is called a non-reversible machine. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 83. |
Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its mid-point |
| A. | same as |
| B. | twice |
| C. | thrice |
| D. | four times |
| Answer» E. | |
| 84. |
Moment of inertia of a hollow rectangular section as shown in the below figure about - axis, is not the same as that about - axis. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 85. |
The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle. |
| A. | True |
| B. | False |
| Answer» C. | |
| 86. |
The velocity ratio for the third system of pulleys is |
| A. | 2 |
| B. | 2 |
| C. | - 1 |
| Answer» E. | |
| 87. |
If the gravitational acceleration at any place is doubled, then the weight of a body will be |
| A. | /2 |
| B. | 2 |
| Answer» E. | |
| 88. |
The velocity ratio of a first system of pulleys with 4 pulleys is |
| A. | 4 |
| B. | 8 |
| C. | 16 |
| D. | 20 |
| Answer» D. 20 | |
| 89. |
One joule means that |
| A. | work is done by a force of 1 N when it displaces a body through 1m |
| B. | work is done by a force of 1 kg when it displaces a body through 1 m |
| C. | work is done by a force of 1 dyne when it displaces a body through 1 cm |
| D. | work is done by a force of 1 g when it displaces a body through 1 cm |
| Answer» B. work is done by a force of 1 kg when it displaces a body through 1 m | |
| 90. |
The velocity ratio for the first system of pulleys is(where is the number of pulleys.) |
| A. | 2 |
| B. | 2 |
| C. | - 1 |
| Answer» D. | |
| 91. |
The loss of kinetic energy due to direct impact of two bodies __________ upon the value of coefficient of restitution. |
| A. | depends |
| B. | does not depend |
| Answer» B. does not depend | |
| 92. |
A body of mass moving with a constant velocity strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| Answer» C. 8 | |
| 93. |
The force, by which the body is attracted, towards the centre of the earth, is called |
| A. | impulsive force |
| B. | mass |
| C. | weight |
| D. | momentum |
| Answer» D. momentum | |
| 94. |
Coplaner concurrent forces are those forces which |
| A. | meet at one point, but their lines of action do not lie on the same plane |
| B. | do not meet at one point and their lines of action do not lie on the same plane |
| C. | meet at one point and their lines of action also lie on the same plane |
| D. | do not meet at one point, but their lines of action lie on the same plane |
| Answer» D. do not meet at one point, but their lines of action lie on the same plane | |
| 95. |
The power developed by a body acted upon by a torque newton metre (N - m) and revolving at ω radian/s is given by |
| A. | .ω (in watts) |
| B. | .ω/60 (in watts) |
| C. | .ω/75 (in kilowatts) |
| D. | .ω/4500 (in kilowatts) |
| Answer» B. .ω/60 (in watts) | |
| 96. |
The centre of gravity of a right angled triangle lies at its geometrical centre. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 97. |
Vectors method for the resultant force is also called polygon law of forces. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 98. |
Two equal and opposite parallel forces whose lines of action are different form a couple. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 99. |
When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium. |
| A. | inward |
| B. | outward |
| Answer» B. outward | |
| 100. |
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 centre of gravity of the section will lie |
| A. | in the shaded area |
| B. | in the hole |
| C. | at |
| Answer» B. in the hole | |