Thermal revision 2

Thermal revision 2

University

12 Qs

quiz-placeholder

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Thermal revision 2

Thermal revision 2

Assessment

Quiz

Professional Development

University

Hard

Created by

Prem Kumar

Used 1+ times

FREE Resource

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following is NOT one of the methods to improve Rankine efficiency?

Increasing condensor pressure

Increasing Boiler pressure

Lowering condensor pressure

Super heating to higher temperature

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Fixed blade in reaction turbine does NOT

reduce pressure of steam

Just change the direction and neither increase velocity nor decrease pressure

reduce of enthalpy of steam

reduce velocity of steam

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Fixed blade in impulse turbine

Just change the direction and neither increase velocity or decrease pressure

reduce pressure of steam

increase velocity of steam

reduce of enthalpy of steam

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Reason for compounding in impulse turbine

To reduce cost

To reduce efficiency

To extract maximum of energy from steam

To save space and noise

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Reduction in steam velocity at outlet of nozzle is NOT due to

inlet velocity of steam

Friction between the steam and nozzle

Friction between the steam particles

Shock at nozzle

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Blade coefficient

ratio of outlet relative velocity to inlet relative velocity

ratio of inlet relative velocity to outlet relative velocity

ratio of outlet relative velocity to inlet absolute velocity

ratio of outlet relative velocity to inlet flow velocity

7.

MULTIPLE CHOICE QUESTION

1 min • 3 pts

The water (density = 1000 kg/m3) is pumped from 80 kPa to 3 MPa.Isentropic efficiency = 0.85, specific work (in kJ/kg)?

2.92

3.43

2.48

0.34

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