Engineering Mechanics | Mechanical Engineering

A machine having an efficiency greater than 50%, is known as

Byadmin September 14, 2022

Question: A machine having an efficiency greater than 50%, is known as
[A].

reversible machine

[B].

non-reversible machine

[C].

neither reversible nor non-reversible machine

[D].

ideal machine

Answer: Option A

Explanation:

No answer description available for this question.

Engineering Mechanics

Limiting force of friction is the__________________?

Limiting force of friction is the__________________?

A. tangent of angle between normal-reaction and the resultant of normal reaction and limiting friction
B. ratio of limiting friction and normal reaction
C. the friction force acting when the body is just about to move
D. the friction force acting when the body is in motion
E. minimum force of friction

Read More Limiting force of friction is the__________________?
Ic Engines And Nuclear Power Plants | Mechanical Engineering

The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S – Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

Question: The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S – Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)
[A].

[B].

[C].

[D].
all of these

Answer: Option D

Explanation:

No answer description available for this question.

Read More The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S – Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

During dehumidification process, the relative humidity

Question: During dehumidification process, the relative humidity
[A].

remains constant
[B].
increases
[C].
decreases

Answer: Option C

Explanation:

No answer description available for this question.

Read More During dehumidification process, the relative humidity
Hydraulics and Fluid Mechanics | Mechanical Engineering

According to Darcy’s formula, the loss of head due to friction in the pipe is (where f = Darcy’s coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)

Question: According to Darcy’s formula, the loss of head due to friction in the pipe is (where f = Darcy’s coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Read More According to Darcy’s formula, the loss of head due to friction in the pipe is (where f = Darcy’s coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
Engineering Materials | Mechanical Engineering

In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.

Question: In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.
[A].

True
[B].
False

Answer: Option A

Explanation:

No answer description available for this question.

Read More In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.
Engineering Mechanics | Mechanical Engineering

If a number of forces are acting at a point, theirresultant will be inclined at an angle θ with the horizontal, such that

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.

Read More If a number of forces are acting at a point, theirresultant will be inclined at an angle θ with the horizontal, such that

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