Hydraulics and Fluid Mechanics | Mechanical Engineering

According to Pascal’s law, the intensity of pressure at any point in a fluid at rest is the same in all directions.

Byadmin September 14, 2022

Question: According to Pascal’s law, the intensity of pressure at any point in a fluid at rest is the same in all directions.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Engineering Materials | Mechanical Engineering

German silver contains

Question: German silver contains
[A].

70% copper and 30% zinc
[B].
60% copper and 40% zinc
[C].
59% copper, 40% zinc and 1% tin
[D].
60.45% copper, 35.2% zinc and 5.35% nickel

Answer: Option D

Explanation:

No answer description available for this question.

Read More German silver contains
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

During sub-cooling, sensible heat from a liquid refrigerant is removed.

Question: During sub-cooling, sensible heat from a liquid refrigerant is removed.
[A].

Yes
[B].
No

Answer: Option A

Explanation:

No answer description available for this question.

Read More During sub-cooling, sensible heat from a liquid refrigerant is removed.
Hydraulic Machines | Mechanical Engineering

If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

Question: If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by
[A].

H = Hg/hf
[B].
H = Hg x hf
[C].
H = Hg + hf
[D].
H = Hg – hf

Answer: Option D

Explanation:

No answer description available for this question.

Read More If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by
Engineering Mechanics | Mechanical Engineering

A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Question: A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
[A].

both the balls undergo an equal change in momentum
[B].
the change in momentum suffered by rubber ball is more than the lead ball
[C].
the change in momentum suffered by rubber ball is less than the lead ball
[D].
none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Read More A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In which of the following refrigeration system, waste heat can be effectively used?

Question: In which of the following refrigeration system, waste heat can be effectively used?
[A].

Vapour compression cycle
[B].
Vapour absorption cycle
[C].
Air refrigeration cycle
[D].
none of these

Answer: Option B

Explanation:

No answer description available for this question.

Read More In which of the following refrigeration system, waste heat can be effectively used?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

During dehumidification process, __________ remains constant.

Question: During dehumidification process, __________ remains constant.
[A].

wet bulb temperature
[B].
relative humidity
[C].
dry bulb temperature
[D].
specific humidity

Answer: Option C

Explanation:

No answer description available for this question.

Read More During dehumidification process, __________ remains constant.

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