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Civil Set-1
Structural Engineering III
65

Structural Engineering III MCQ with Answers

65) Pick up wrong statement about friction force for dry surfaces. Friction force is

proportional to normal load between the surfaces

dependent on the materials of contact surface

proportional to velocity of sliding

independent of the area of contact surfaces

Answer is:

proportional to velocity of sliding

Structural Engineering III MCQ with Answers

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66) A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to

W sin (a + $)

Wtan(a + <|))

W\an(a-<t>)

Answer is:

Wtan(a + <|))

67) A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t - 4), the acceleration of the particle will be given by the equation

3t2-lt

3t2+2t

6f-8

6f-4

Answer is:

6f-8

68) A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is

0°

30°

45°

60°

Answer is:

45°

Explanation:

Angle of projection: Angle of projection is the angle, with the horizontal,at which the projectile is projected.

A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is 45°.

A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is

69) Limiting force of friction is the

tangent of angle between normal-reaction and the resultant of normal reaction and limiting friction

ratio of limiting friction and normal reaction

the friction force acting when the body is just about to move

the friction force acting when the body is in motion

Answer is:

the friction force acting when the body is just about to move

Structural Engineering III MCQ with Answers

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65) Pick up wrong statement about friction force for dry surfaces. Friction force is

proportional to velocity of sliding

Structural Engineering III MCQ with Answers

Related Structural Engineering III MCQ with Answers

66) A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to

Wtan(a + <|))

67) A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t - 4), the acceleration of the particle will be given by the equation

6f-8

68) A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is

45°

69) Limiting force of friction is the

the friction force acting when the body is just about to move

Structural Engineering III MCQ with Answers