Engineering Mechanics MCQs

Question 1

The forces, which meet at one point, but their lines of action do not lie in a plane, are called

Accepted Answer

Non-coplanar concurrent forces

Answer

Coplanar non-concurrent forces

Answer

Non-coplanar non-concurrent forces

Answer

Intersecting forces

Question 2

The possible loading in various members of framed structures are

Accepted Answer

Compression or tension

Answer

Buckling or shear

Answer

Shear or tension

Answer

All of the above

Question 3

Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

Accepted Answer

Hyperbola

Answer

Ellipse

Answer

Parabola

Answer

Circle

Question 4

The loss of kinetic energy during inelastic impact, is given by (where m1 = Mass of the first body, m2 = Mass of the second body, u1 and u2 = Velocities of the first and second bodies respectively.)

Accepted Answer

$$\frac{{{{	ext{m}}_1}{{	ext{m}}_2}}}{{2\left( {{{	ext{m}}_1} + {{	ext{m}}_2}} ight)}}{\left( {{{	ext{u}}_1} - {{	ext{u}}_2}} ight)^2}$$

Answer

$$\frac{{2\left( {{{	ext{m}}_1} + {{	ext{m}}_2}} ight)}}{{{{	ext{m}}_1}{{	ext{m}}_2}}}{\left( {{{	ext{u}}_1} - {{	ext{u}}_2}} ight)^2}$$

Answer

$$\frac{{{{	ext{m}}_1}{{	ext{m}}_2}}}{{2\left( {{{	ext{m}}_1} + {{	ext{m}}_2}} ight)}}\left( {{	ext{u}}_1^2 - {	ext{u}}_2^2} ight)$$

Answer

$$\frac{{2\left( {{{	ext{m}}_1} + {{	ext{m}}_2}} ight)}}{{{{	ext{m}}_1}{{	ext{m}}_2}}}\left( {{	ext{u}}_1^2 - {	ext{u}}_2^2} ight)$$

Question 5

Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is ________ than that about X-X axis.

Accepted Answer

Two times

Answer

Same

Answer

Half

Answer

None of these

Question 6

In a framed structure, as shown in the below figure, the force in the member AB is __________ the force in member AC.

Accepted Answer

Half

Answer

Equal to

Answer

Double

Answer

None of these

Question 7

A force is completely defined when we specify

Accepted Answer

All of the above

Answer

Magnitude

Answer

Direction

Answer

Point of application

Question 8

The C.G. of a solid hemisphere lies on the central radius

Accepted Answer

At distance $$\frac{{3{	ext{r}}}}{8}$$ from the plane base

Answer

At distance $$\frac{{3{	ext{r}}}}{2}$$ from the plane base

Answer

At distance $$\frac{{3{	ext{r}}}}{4}$$ from the plane base

Answer

At distance $$\frac{{3{	ext{r}}}}{5}$$ from the plane base

Question 9

If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

Accepted Answer

Second

Answer

First

Answer

Third

Answer

None of these