MECHANICAL ENGINEERING (ENGINEERING MECHANICS) MCQs

The friction experienced by a body, when in motion, is known as

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Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity

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The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

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The mechanical advantage of a lifting machine is the ratio of

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Static friction is always __________ dynamic friction

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The bodies which rebound after impact are called

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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

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The angle between two forces when the resultant is maximum and minimum respectively are

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A redundant frame is also called __________ frame.

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When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

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Work done is said to be zero, when

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One watt is equal to

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If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.

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The point, through which the whole weight of the body acts, irrespective of its position, is known as

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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

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The minimum force required to slide a body of weight W on a rough horizontal plane is

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The moment of inertia of a square of side a about its diagonal is

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The maximum efficiency of a lifting machine is

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The acceleration of a particle moving with simple harmonic motion, at any instant is given by

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A machine having an efficiency less than 50%, is known as

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Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

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The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

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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

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When the spring of a watch is wound, it will possess

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The rate of doing work is known as

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Moment of inertia of a circular section about its diameter (d) is

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The static friction

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The velocity of a particle moving with simple harmonic motion is __________ at the mean position.

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The total energy possessed by a system of moving bodies

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For a self locking machine, the efficiency must be

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The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then

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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

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If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

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The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by

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The law of motion involved in the recoil of gun is

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The forces, which meet at one point and their lines of action also lie on the same plane, are known as

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The angle of inclination of the plane at which the body begins to move down the plane, is called

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The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

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A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

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Which of the following statement is correct?

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