Explore topic-wise MCQs in Engineering Mechanics.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.

1.

The ___________ forces do not cause the rotation if the rotation is considered in about the axis of the body or the centroid axis of the body.

A. Non-concurrent
B. Concurrent
C. Parallel
D. Non-Parallel
Answer» C. Parallel
Discussion
2.

Determine the magnitude of the moment of the force about the y-axis.

A. -72Nm
B. 82Nm
C. 210Nm
D. 50NmView Answer
Answer» D. 50NmView Answer
Discussion
3.

Determine the magnitude of the moment of the force about the axis PQ.

A. -72Nm
B. 82Nm
C. 90Nm
D. 50NmView Answer
Answer» B. 82Nm
Discussion
4.

Determine the moment of the force F along the segment QP of the pipe assembly shown in the figure.

A. 110Nm
B. 100Nm
C. 500Nm
D. 510NmView Answer
Answer» C. 500Nm
Discussion
5.

Determine the moment MQP in the vector form produced by the force as shown in the diagram, which tends to rotate the rod ORQP along QP.

A. 72i + 36j Nm
B. 72i – 36j Nm
C. -72i – 36j Nm
D. -72i + 36j NmView Answer
Answer» B. 72i – 36j Nm
Discussion
6.

What if the moment of the force calculated about the axis is negative?

A. It means that the force is applied in the opposite direction as imagined
B. It means that the direction of the motion is in the opposite sense as imagined
C. It means that the radius vector is in the opposite sense as imagined
D. Such calculation means that the calculations are wrongly done
Answer» C. It means that the radius vector is in the opposite sense as imagined
Discussion
7.

What if the perpendicular distance from the axis is infinity?

A. The rotation is not possible
B. The rotation is possible but the moment generated is very less
C. The force applied will be very much high for even a small rotation
D. No rotation unless the contact is being broken
Answer» D. No rotation unless the contact is being broken
Discussion
8.

The axis vector in the calculation of the moment along the axis of rotation is the axis which is collinear with the force vector.

A. True
B. False
Answer» C.
Discussion
9.

Determine the moment’s magnitude produced by the force as shown in the diagram, which tends to rotate the rod ORQP along QP.

A. 80.49 Nm
B. 72.12 Nm
C. -36.67 Nm
D. 36.67 NmView Answer
Answer» B. 72.12 Nm
Discussion
10.

WHAT_IF_THE_PERPENDICULAR_DISTANCE_FROM_THE_AXIS_IS_INFINITY??$

A. The rotation is not possible
B. The rotation is possible but the moment generated is very less
C. The force applied will be very much high for even a small rotation
D. No rotation unless the contact is being broken
Answer» C. The force applied will be very much high for even a small rotation
Discussion
11.

WHICH_OF_THE_FOLLOWING_IS_CORRECT??$

A. We cannot represent the moment caused by the force along any axis in vector form
B. We can represent the moment caused by the force along any axis in the scalar form
C. We cannot represent the moment caused by the force along any point in vector form
D. We can represent the moment caused by the force along any axis in vector form
Answer» C. We cannot represent the moment caused by the force along any point in vector form
Discussion
12.

What if the moment of the force calculated about the axis is negative?$

A. It means that the force is applied in the opposite direction as imagined
B. It means that the direction of the motion is in the opposite sense as imagined
C. It means that the radius vector is in the opposite sense as imagined
D. Such calculation means that the calculations are wrongly done
Answer» C. It means that the radius vector is in the opposite sense as imagined
Discussion
13.

In the equation A.(rxF) the r is heading from ______________ and ending at _____________$

A. Axis of rotation, Force vector
B. Axis of rotation, Force vector’s point of action on the body
C. Force vector, Axis of rotation
D. Force vector’s point of action on the body, Axis of rotation
Answer» B. Axis of rotation, Force vector‚Äö√Ñ√∂‚àö√ë‚àö¬•s point of action on the body
Discussion
14.

72i + 36j Nm

A. 72i – 36j Nm
B. -72i – 36j Nm
C. -72i + 36j Nm
Answer» C. -72i + 36j Nm
Discussion
15.

In the equation A.(rxF), the r vector is what?

A. The magnitude of the axis, i.e. the length of the axis
B. The length of the force vector
C. The length of the radius
D. The radius vector
Answer» E.
Discussion
16.

Which of the following is correct? (For A representing the vector representation of the axis of rotation, r the radius vector and F the force vector)

A. A.(rxF)
B. Ax(rxF)
C. A.(r.F)
D. Fx(r.F)
Answer» C. A.(r.F)
Discussion
17.

In the calculation of the moment of the force about the axis, the cross product table, i.e. the 3X3 matrix which is made for doing the cross product having 3 rows, contains three elements. Which are they from top to bottom?

A. Axis coordinates, point coordinates, and the force coordinates
B. Point coordinates, axis coordinates, and the force coordinates
C. Axis coordinates, force coordinates, and the point coordinates
D. Force coordinates, point coordinates, and the axis coordinates
Answer» E.
Discussion
18.

The calculation of the moment about the axis and the moment about any point by a force applied on the body are different from each other.

A. True
B. False
Answer» B. False
Discussion
19.

49 Nm

A. 72.12 Nm
B. -36.67 Nm
C. 36.67 Nm
Answer» B. -36.67 Nm
Discussion