Engineering Materials | Mechanical Engineering

A small percentage of boron is added to steel in order to

Byadmin September 14, 2022

Question: A small percentage of boron is added to steel in order to
[A].

increase hardenability

[B].

reduce machinability

[C].

increase wear resistance

[D].

increase endurance strength

Answer: Option A

Explanation:

No answer description available for this question.

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.

Question: In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.
[A].

True
[B].
False

Answer: Option B

Explanation:

No answer description available for this question.

Read More In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.
Engineering Mechanics | Mechanical Engineering

A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

Question: A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of
[A].

1m
[B].
2m
[C].
3m
[D].
4m

Answer: Option B

Explanation:

No answer description available for this question.

Read More A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

Question: A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
[A].

1.33
[B].
2.33
[C].
3.33
[D].
4.33

Answer: Option B

Explanation:

No answer description available for this question.

Read More A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
Mechanical Engineering | Production Engineering

In metal cutting, use of low feeds and high cutting speeds is desired when the objective is

Question: In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
[A].

high metal removal rate
[B].
dry machining
[C].
use of soft cutting tool
[D].
surface finish

Answer: Option D

Explanation:

No answer description available for this question.

Read More In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
Compressors | Gas Dynamics and Gas Turbines | Mechanical Engineering

Only rocket engines can be propelled to space because

Question: Only rocket engines can be propelled to space because
[A].

they can generate very high thrust
[B].
they have high propulsion efficiency
[C].
these engines can work on several fuels
[D].
they are not air-breathing engines

Answer: Option D

Explanation:

No answer description available for this question.

Read More Only rocket engines can be propelled to space because
Engineering Materials

The following types of materials are usually the most ductile__________________?

The following types of materials are usually the most ductile__________________?

A. face-centred cubic lattice
B. body-centred cubic lattice
C. hexagonal close-packed lattice
D. all of the above
E. none of the above

Read More The following types of materials are usually the most ductile__________________?

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