In counter-current flow heat exchangers

Byadmin September 14, 2022

Question: In counter-current flow heat exchangers
[A].

both the fluids at inlet are in their hottest state

[B].

both the fluids at inlet are in their coldest state

[C].

both the fluids at exit are in their hottest state

[D].

one fluid is coldest and the other is hottest at inlet

Answer: Option A

Explanation:

No answer description available for this question.

Ic Engines And Nuclear Power Plants | Mechanical Engineering

In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.

Question: In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
[A].

Agree
[B].
Disagree

Answer: Option B

Explanation:

No answer description available for this question.

Read More In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
Compressors | Gas Dynamics and Gas Turbines | Mechanical Engineering

For minimum work required to compress and deliver a quantity of air by multi-stage compression,

Question: For minimum work required to compress and deliver a quantity of air by multi-stage compression,
[A].

the compression ratio in each stage should be same
[B].
the intercooling should be perfect
[C].
the workdone in each stage should be same
[D].
all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Read More For minimum work required to compress and deliver a quantity of air by multi-stage compression,
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

The by-pass factor for a cooling coil

Question: The by-pass factor for a cooling coil
[A].

increases with increase in velocity of air passing through it
[B].
decreases with increase in velocity of air passing through it
[C].
remains unchanged with increase in velocity of air passing through it
[D].
may increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

Answer: Option A

Explanation:

No answer description available for this question.

Read More The by-pass factor for a cooling coil
Ic Engines And Nuclear Power Plants | Mechanical Engineering

The basic requirement of a good combustion chamber is

Question: The basic requirement of a good combustion chamber is
[A].

minimum turbulence
[B].
low compression ratio
[C].
high thermal efficiency and power output
[D].
low volumetric efficiency

Answer: Option C

Explanation:

No answer description available for this question.

Read More The basic requirement of a good combustion chamber is
Automobile Engineering | Mechanical Engineering

If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about

Question: If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
[A].

17:1
[B].
15:1
[C].
13:1
[D].
10:1

Answer: Option D

Explanation:

No answer description available for this question.

Read More If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
Refrigeration and Air Conditioning

In vapor compression refrigeration system, refrigerant occurs as liquid between_________________?

In vapor compression refrigeration system, refrigerant occurs as liquid between_________________?

A. condenser and expansion valve
B. compressor and evaporator
C. expansion valve and evaporator
D. compressor and condenser
E. none of the above

Read More In vapor compression refrigeration system, refrigerant occurs as liquid between_________________?

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