Which of the following process can be made reversible with the help of a regenerator?

The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.

A

Isobaric

B

Isothermal

C

Adiabatic

D

None of these

In regenerator type heat exchanger, heat transfer takes place by

A

Direct mixing of hot and cold fluids

B

A complete separation between hot and cold fluids

C

Flow of hot and cold fluids alternately over a surface

D

Generation of heat again and again

Gas turbine cycle with regenerator

A

Increases thermal efficiency

B

Allows high compression ratio

C

Decreases heat loss is exhaust

D

Allows operation at very high altitudes

The gas turbine cycle with regenerator improves

A

Work ratio

B

Thermal efficiency

C

Avoid pollution

D

None of these

Which of the following processes can not be made reversible even under ideal condition of operation?

A

Free expansion of a gas

B

Compression of air in a compressor

C

Expansion of steam in a turbine

D

All of the above

A teacher can help adolescent to overcome his special problems, and help him to adjust to the environment. Which of the following attitude, he should not made?

A

He should impart right information about sex

B

He should redirect the energies of the adolescent to fruitful channels through sports and other constructive activities

C

He should have unsympathetic attitude towards others

D

He should have right information about sex

Which of the following is not a reversible process ?

A

Expansion of an ideal gas against constant pressure

B

Atmospheric pressure vaporisation of water at 100°C

C

Solution of NaCl in water at 50°C

D

None of these

Which of the following is a reversible non-flow process?

A

Isochoric process

B

Isobaric process

C

Hyperbolic process

D

All of these

Which of the following is not correct for a reversible adiabatic process?

A

$${\text{T}}{{\text{V}}^{\gamma - 1}}$$ = constant

B

$${{\text{P}}^{1 - \gamma }}.{{\text{T}}^{\text{Y}}}$$ = constant

C

$${\text{P}}{{\text{V}}^\gamma }$$ = constant

D

None of these

কোন সিস্টেমের অবস্থার পরিবর্তনের ক্ষেত্রে Reversible Process একটি-

A

একমুখী প্রক্রিয়া

B

ধীর প্রক্রিয়া

C

দ্রুত প্রক্রিয়া

D

স্বতঃস্ফূর্ত প্রক্রিয়া

Which of the following process can be made reversible with the help of a regenerator?

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