McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 51. |
Non-coplaner non-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. | do not meet at one point, but their lines of action lie on the same plane |
| D. | none of the above |
| Answer» B. do not meet at one point and their lines of action do not lie on the same plane | |
| 52. |
A machine having an efficiency greater than 50%, is known as |
| A. | reversible machine |
| B. | non-reversible machine |
| C. | neither reversible nor non-reversible machine |
| D. | ideal machine |
| Answer» A. reversible machine | |
| 53. |
The time taken by a particle for one complete oscillation is known as periodic time. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 54. |
The centre of gravity of a right circular solid cone is at a distance of |
| A. | h / 2 |
| B. | h / 3 |
| C. | h / 4 |
| D. | h / 6 |
| Answer» C. h / 4 | |
| 55. |
In order to determine the effects of a force, acting on a body, we must know |
| A. | magnitude of the force |
| B. | line of action of the force |
| C. | nature of the force i.e. whether the force is push or pull |
| D. | all of the above |
| Answer» D. all of the above | |
| 56. |
The ratio of static friction to dynamic friction is always |
| A. | equal to one |
| B. | less than one |
| C. | greater than one |
| D. | none of these |
| Answer» C. greater than one | |
| 57. |
Two equal and opposite parallel forces whose lines of action are different form a couple. |
| A. | Right |
| B. | Wrong |
| Answer» A. Right | |
| 58. |
The range of a projectile is maximum, when the angle of projection is |
| A. | 30? |
| B. | 45? |
| C. | 60? |
| D. | 90? |
| Answer» B. 45? | |
| 59. |
The mechanical advantage of a lifting machine is the ratio of |
| A. | distance moved by effort to the distance moved by load |
| B. | load lifted to the effort applied |
| C. | output to the input |
| D. | all of the above |
| Answer» B. load lifted to the effort applied | |
| 60. |
Moment of inertia of a circular section about its diameter (d) is |
| A. | ?d3 / 16 |
| B. | ?d3 / 32 |
| C. | ?d4 / 32 |
| D. | ?d4 / 64 |
| Answer» D. ?d4 / 64 | |
| 61. |
The total motion possessed by a body, is called |
| A. | impulsive force |
| B. | mass |
| C. | weight |
| D. | momentum |
| Answer» D. momentum | |
| 62. |
Which of the following are vector quantities? |
| A. | Linear displacement |
| B. | Linear velocity |
| C. | Linear acceleration |
| D. | all of these |
| Answer» D. all of these | |
| 63. |
The radius of gyration is the distance where the whole mass (or area) of a body is assumed to be concentrated. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 64. |
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is |
| A. | reversible |
| B. | non-reversible |
| C. | ideal |
| Answer» A. reversible | |
| 65. |
A lifting machine lifts a load of 1000N through a distance of 0.2 m by means of an effort of 200N through a distance of 1m. This machine is an ideal one. |
| A. | Right |
| B. | Wrong |
| Answer» A. Right | |
| 66. |
The velocity ratio of a single purchase crab winch can be increased by |
| A. | increasing the length of the handle |
| B. | increasing the radius of the load drum |
| C. | increasing the number of teeth of the pinion |
| D. | all of the above |
| Answer» A. increasing the length of the handle | |
| 67. |
When two elastic bodies collide with each other, |
| A. | the two bodies will momentarily come to rest after collision |
| B. | the two bodies tend to compress and deform at the surface of contact |
| C. | the two bodies begin to regain their original shape |
| D. | all of the above |
| Answer» D. all of the above | |
| 68. |
Moment of inertia is the |
| A. | second moment of force |
| B. | second moment of area |
| C. | second moment of mass |
| D. | all of these |
| Answer» D. all of these | |
| 69. |
The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 70. |
When a person, on a bicycle, drives round a curve, he has to lean |
| A. | inward |
| B. | outward |
| Answer» A. inward | |
| 71. |
The bodies which rebound after impact are called |
| A. | inelastic bodies |
| B. | elastic bodies |
| C. | neither elastic nor inelastic bodies |
| D. | none of these |
| Answer» B. elastic bodies | |
| 72. |
If the number of pulleys in a system is equal to its velocity ratio, then it is a |
| A. | first |
| B. | second |
| C. | third |
| Answer» B. second | |
| 73. |
The energy possessed by a body, for doing work by virtue of its position, is called |
| A. | potential energy |
| B. | kinetic energy |
| C. | electrical energy |
| D. | chemical energy |
| Answer» A. potential energy | |
| 74. |
The matter contained in a body, is called |
| A. | impulsive force |
| B. | mass |
| C. | weight |
| D. | momentum |
| Answer» B. mass | |
| 75. |
The motion of a wheel of a car is |
| A. | purely translation |
| B. | purely rotational |
| C. | combined translation and rotational |
| D. | none of these |
| Answer» C. combined translation and rotational | |
| 76. |
The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then |
| A. | P = Q |
| B. | Q = R |
| C. | Q = 2R |
| D. | none of these |
| Answer» B. Q = R | |
| 77. |
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is |
| A. | bh3 / 4 |
| B. | bh3 / 8 |
| C. | bh3 / 12 |
| D. | bh3 / 36 |
| Answer» C. bh3 / 12 | |
| 78. |
According to lami's theorem |
| A. | the three forces must be equal |
| B. | the three forces must be at 120? to each other |
| C. | the three forces must be in equilibrium |
| D. | if the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two |
| Answer» D. if the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two | |
| 79. |
The centre of gravity of a rectangle lies at a point where its two diagonals meet each other. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 80. |
A pendulum which executes one beat per second is known as |
| A. | simple pendulum |
| B. | compound pendulum |
| C. | torsional pendulum |
| D. | second's pendulum |
| Answer» D. second's pendulum | |
| 81. |
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as |
| A. | principle of independence of forces |
| B. | principle of resolution of forces |
| C. | principle of transmissibility of forces |
| D. | none of these |
| Answer» B. principle of resolution of forces | |
| 82. |
Which of the fololowing statement is correct in connection with projectiles? |
| A. | A path, traced by a projectile in the space, is known as trajectory. |
| B. | The velocity with which a projectile is projected, is known as the velocity of projection. |
| C. | The angle, with the horizontal, at which a projectile is projected is known as angle of projection. |
| D. | all of the above |
| Answer» D. all of the above | |
| 83. |
The angle of inclination with the vertical is |
| A. | more |
| B. | less |
| Answer» A. more | |
| 84. |
The centre of gravity of an equilateral triangle with each side a, is |
| A. | ?3 a/2 |
| B. | 2?3 a |
| C. | a/2 ?3 |
| D. | 3?2 a |
| Answer» C. a/2 ?3 | |
| 85. |
In a screw jack, the effort required to lift the load is given by. Where W = Load lifted, ? = Helix angle, and ? = Angle of friction |
| A. | P = W tan (? ? ?) |
| B. | P = W tan (? + ?) |
| C. | P = W tan (? - ?) |
| D. | P = W tan (? + ?) |
| Answer» B. P = W tan (? + ?) | |
| 86. |
Static friction is always |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 87. |
If a number of forces acting at a point be represented in magnidude and direction by the three sides of a triangle, taken in order, then the forces are not in equilibrium |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 88. |
One joule means that |
| A. | work is done by a force of 1 N when it displaces a body through 1 m |
| 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» A. work is done by a force of 1 N when it displaces a body through 1 m | |
| 89. |
The velocity ratio for the third system of pulleys is |
| A. | n |
| B. | n2 |
| C. | 2n |
| D. | 2n - 1 |
| Answer» D. 2n - 1 | |
| 90. |
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of |
| A. | 1 m |
| B. | 2 m |
| C. | 3 m |
| D. | 4 m |
| Answer» B. 2 m | |
| 91. |
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to |
| A. | area of the triangle |
| B. | twice the area of the triangle |
| C. | half the area of the triangle |
| D. | none of these |
| Answer» B. twice the area of the triangle | |
| 92. |
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is |
| A. | bh3 / 4 |
| B. | bh3 / 8 |
| C. | bh3 / 12 |
| D. | bh3 / 36 |
| Answer» D. bh3 / 36 | |
| 93. |
The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in mangnitude and direction by the third side of of a triangle, taken in opposite order. |
| A. | TRUE |
| B. | FALSE |
| Answer» A. TRUE | |
| 94. |
The friction experienced by a body, when in motion, is known as |
| A. | rolling friction |
| B. | dynamic friction |
| C. | limiting friction |
| D. | static friction |
| Answer» B. dynamic friction | |
| 95. |
The forces, which do not meet at one point, but their lines of action lie on the same plane, are known as coplaner concurrent forces |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 96. |
A redundant frame is also called |
| A. | perfect |
| B. | imperfect |
| C. | deficient |
| Answer» B. imperfect | |
| 97. |
The process of finding out the resultant force is called |
| A. | composition |
| B. | resolution |
| Answer» A. composition | |
| 98. |
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following |
| A. | both the balls undergo an equal change in momentum |
| B. | the change in momentum suffered by rubber ball is more than the lead balf |
| C. | the change in momentum suffered by rubber ball is less than the lead ball |
| D. | none of the above |
| Answer» B. the change in momentum suffered by rubber ball is more than the lead balf | |
| 99. |
The centre of gravity of a semi-circle lies at a distance of |
| A. | 3r/8 |
| B. | 4r/3? |
| C. | 8r / 3 |
| D. | 3r / 4? |
| Answer» B. 4r/3? | |
| 100. |
The velocity ratio of a first system of pulleys with 4 pulleys is |
| A. | 4 |
| B. | 8 |
| C. | 16 |
| D. | 20 |
| Answer» C. 16 | |
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