Q.1
A machine having an efficiency greater than 50%, is known as
Q.2
Two bodies of masses m₁ and m₂ are hung from the ends of a rope, passing over a frictionless pulley as shown in the figure below. The acceleration of the string will be Engineering Mechanics
Engineering Mechanics mcq question image
Q.3
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
Q.4
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)
Q.5
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
Q.6
The centre of percussion is below the centre of gravity of the body and is at a distance equal to
Q.7
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.
Q.8
Frictional force encountered after commencement of motion is called
Q.9
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity
Q.10
A single force and a couple acting in the same plane upon a rigid body
Q.11
Tangent of angle of friction is equal to
Q.12
Which of the following statement is correct?
Q.13
The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
Q.14
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.
Engineering Mechanics mcq question image
Q.15
The process of finding out the resultant force is called __________ of forces.
Q.16
The velocity ratio of a single purchase crab winch can be increased by
Q.17
In order to determine the effects of a force, acting on a body, we must know
Q.18
Concurrent forces are those forces whose lines of action
Q.19
A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal
Q.20
The center of percussion of a solid cylinder of radius ‘r’ resting on a horizontal plane will be
Q.21
The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are
Q.22
The moment of inertia of a square of side a about its diagonal is
Q.23
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is
Q.24
A redundant frame is also called __________ frame.
Q.25
The horizontal range of a projectile (R) is given by
Q.26
If the body falls freely under gravity, then the gravitational acceleration is taken as
Q.27
Which of the following is not the unit of work, energy and heat?
Q.28
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of
Q.29
The algebraic sum of moments of the forces forming couple about any point in their plane is
Q.30
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is
Q.31
The periodic time of a particle with simple harmonic motion is _________ proportional to the angular velocity.
Q.32
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
Q.33
When a body falls freely under gravitational force, it possesses __________ weight.
Q.34
The resultant of two forces P and Q acting at an angle θ is
Q.35
The total energy possessed by a system of moving bodies
Q.36
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as
Q.37
The coefficient of friction depends on
Q.38
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:
Q.39
The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is
Q.40
One joule is equal to
Q.41
One joule means that
Q.42
One kg force is equal to
Q.43
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.
Q.44
The amplitude is always __________ radius of the circle.
Q.45
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)
Q.46
Forces are called coplanar when all of them acting on body lie in
Q.47
If a body is acted upon by a number of coplanar non-concurrent forces, it may
Q.48
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
Q.49
Which of the following is not the unit of distance?
Q.50
Which of the following is not the unit of pressure?
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