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During polytropic process

During polytropic process

A

Heat transfer takes place across cylinder walls

B

Work is done

C

Steam may be wet, dry or superheated after expansion

D

All of the above

During polytropic process Correct Answer All of the above

Bissoy MCQ Team

Mechanical Engineering
Steam Boilers
Engines
Nozzles And Turbines

Related Questions

If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

A

Volume

B

Pressure

C

Temperature

D

Enthalpy

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 case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

A

1

B

1.4

C

1.5

D

$$\gamma = \frac{{{{\text{C}}_{\text{p}}}}}{{{{\text{C}}_{\text{v}}}}}$$

The polytropic index (n) is given by

A

$$\frac{{\log \left( {{{\text{p}}_1}{{\text{p}}_2}} \right)}}{{\log \left( {{{\text{v}}_1}{{\text{v}}_2}} \right)}}$$

B

$$\frac{{\log \left( {\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}} \right)}}{{\log \left( {\frac{{{{\text{v}}_1}}}{{{{\text{v}}_2}}}} \right)}}$$

C

$$\frac{{\log \left( {\frac{{{{\text{v}}_1}}}{{{{\text{v}}_2}}}} \right)}}{{\log \left( {\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}} \right)}}$$

D

$$\log \left( {\frac{{{{\text{p}}_1}{{\text{v}}_1}}}{{{{\text{p}}_2}{{\text{v}}_2}}}} \right)$$

The value of machine is TK.6250. Its value decreases by 10% during the first year, 20% during second year and 30% during the third year. What will be the value of the machine after 3 years?

A

2650

B

3050

C

3150

D

3750

Arman invested Tk. 10,000 in a mutual fund account there years ago . The value of the account increased by 10% during the first year , increased by 5% during the second year but unfortunately decreased by 10% during the penultimate year. What is the value of the account today?

A

10,350

B

10,395

C

10,500

D

11,500

Arman invested Tk,. 10,000 in a mutual fund account three years ago, The value of the account increased by 10% during the first year. increased by 5% during the second year but unfortunately decreased by 10% during the penultimate year. What is the value of the account today?

A

10,350

B

10,395

C

10,500

D

11,500

The average wage of a worker during a fortnihgt comprising 15 consecutive working days was Taka 90 per day. During the first 7 days, his average wage was Taka 87 per day and the average wage during the last 7 days was Taka 92 per day. What was his wage on the 8th day ?

A

83

B

90

C

92

D

97

The value of a machine is Tk.6250. Its value decreases by 10% during the first year, 20% during the second year and 30% during the third year. What will be the value of the machine after 3 years?

A

2650

B

3050

C

3150

D

3750

What part of the manufacturing process relate to each stage of the process and to the process as a whole?

A

field service

B

design

C

distribution

D

project management

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