Mechanical Engineering

Question: The amplitude is always __________ radius of the circle.
[A].

equal to

[B].

less than

[C].

greater than

Answer: Option A

Explanation:

No answer description available for this question.

Question: Frequency of vibrations means the number of cycles per second.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: In order to completely specify angular displacement by a vector, it must fix
[A].

direction of the axis of rotation

[B].

magnitude of angular displacement

[C].

sense of angular displacement

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: The angular velocity (in rad / s) of a body rotating at N revolutions per minute is
[A].

πN/60

[B].

πN/180

[C].

2πN/60

[D].

2πN/180

Answer: Option C

Explanation:

No answer description available for this question.

Question: If a number of forces are acting at a point, theirresultant will be inclined at an angle θ with the horizontal, such that
[A].

tan θ = ∑H/∑V

[B].

tan θ = ∑V/∑H

[C].

tan θ = ∑Vx∑H

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Question: The cartesian equation of trajectory is(where u = Velocity of projection, α = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)
[A].

[B].

[C].

[D].

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following statement is correct in connection with projectiles?
[A].

A path, traced by a projectile in the space, is known as trajectory.

[B].

The velocity with which a projectile is projected, is known as the velocity of projection.

[C].

The angle, with the horizontal, at which a projectile is projected is known as angle of projection.

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will
[A].

increase

[B].

decrease

[C].

remain the same

Answer: Option B

Explanation:

No answer description available for this question.

Question: A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
[A].

m1/m2

[B].

m1.g sin α

[C].

m1.m2/m1+m2

[D].

Answer: Option D

Explanation:

No answer description available for this question.

Question: A block ot 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.
[A].

increase

[B].

decrease

[C].

not be effected

Answer: Option A

Explanation:

No answer description available for this question.