MCQ-25 Engineering Mechanics
Engineering Mechanics Quiz
Test your knowledge of engineering mechanics with our comprehensive 25-question multiple choice quiz! This quiz covers a variety of essential topics including forces, moments, and friction, designed to challenge both students and professionals.
Whether you're looking to brush up on your skills or prepare for an exam, this quiz is perfect for you. Get ready to:
- Understand key mechanics principles
- Examine real-world applications
- Enhance your problem-solving abilities
The unit of work or energy in S.I. Units is
Newton
Pascal
Kilogram Meter
Watt
Joule
Forces are called concurrent when their lines of action meet in
One point
Two points
Plane
Perpendicular planes
Different planes
A force acting on a body may
Introduce internal stresses
Balance the other forces acting on it
Retard its motion
Change its motion
All of the above
If a number of forces act simultaneously on a particle, it is possible
Not a replace them by a single force
To replace them by a single force
To replace them by a single force through C.G.
To replace them by a couple
To replace them by a couple and a force
If two equal forces of magnitude P act at an angle 9°, their resultant will be
P/2 cos 9/2
2P sin 9/2
2P tan 9/2
2P cos 9/2
Psin 9/2
Which of the following do not have identical dimensions ?
Momentum and impulse
Torque and energy
Torque and work
Kinetic energy and potential energy
Moment of a force and angular momentum
According to principle of transmissibility of forces, the effect of a force upon a body is
Maximum when it acts at the center of gravity of a body
Different at different points in its line of action
The same at every point in its line of action
Minimum when it acts at the C.G. Of the body
None of the above
According to law of triangle of forces
Three forces acting at a point will be in equilibrium
Three forces acting at a point can be represented by a triangle, each side being proportional to force
If three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
None of the above
D’ Alembert’s principle is used for
Reducing the problem of kinetics to equivalent statics problem
Determining stresses in the truss
Stability of floating bodies
Designing safe structures
Solving kinematic problems.
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if
The floor is smooth, the wall is rough
The floor is rough, the wall is smooth
The floor and wall both are smooth surfaces
The floor and wall both are rough surfaces
Will be in equilibrium under all conditions
According to Lami’s theorem
Three forces acting at a point will be in equilibrium
Three forces acting at a point can be represented by a triangle, each side being proportional to force
If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
None of the above
The moment of inertia of a thin rod of mass 'm' and length 'L', about an axis through its centre of gravity and perpendicular to its length is
ML2/4
ML2/6
ML2/8
ML2/12
None of these
A framed structure is perfect if it contains members equal to where n = number of joints in a frame
2n-3
N-l
2n-l
N – 2
3n-2
The center of gravity of a uniform lamina lies at
The center of heavy portion
The bottom surface
The mid point of its axis
All of the above
None of the above.
Center of percussion is
The point of C.G.
The point of metacentre
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
Point of suspension
The point in a body about which it can rotate horizontally and oscillate under the influence of gravity.
The center of percussion of the homogeneous rod of length L suspended at the top will be
L/2
L/3
3L/4
2L/3
3L/8.
A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve
Catenary
Parabola
Hyperbola
Elliptical
Circular arc.
Angle of friction is the
Angle between normal reaction and the resultant of normal reaction and the limiting friction
Ratio of limiting friction and normal reaction
The ratio of minimum friction force to the friction force acting when the body is just about to move
The ratio of minimum friction force to friction force acting when the body is in motion
Ratio of static and dynamic friction.
The coefficient of friction depends on
Area of contact
Shape of surfaces
Strength of surfaces
Nature of surface
All of the above.
The ratio of limiting friction and normal reaction is known as
Coefficient of friction
Angle of friction
Angle of repose
Sliding friction
Friction resistance.
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be
Towards the wall at its upper end
Away from the wall at its upper end
Upwards at its upper end
Downwards at its upper end
None of the above.
Frictional force encountered after commencement of motion is called
Post friction
Limiting friction
Kinematic friction
Frictional resistance
Dynamic friction.
Coulomb friction is the friction between
Bodies having relative motion
Two dry surfaces
Two lubricated surfaces
Solids and liquids
Electrically charged particles.
Dynamic friction as compared to static friction is
Same
More
Less
May be less of more depending on nature of surfaces and velocity
Has no correlation.
A cable with a uniformly distributed load per horizontal meter run will take the following shape
Straight line
Parabola
Hyperbola
Elliptical
Part of a circle.
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