A cylinder contains 5 m3 of an ideal gas at a pressure of 1 bar. This gas is compressed in a reversible isothermal process till its pressure increases to 5 bar. The work in kJ required for this process is

1.  804.7

2.  953.2

3.  981.7

4.  1012.2

View Answer  
4
Correct Answer :

804.7


Explanation :
No Explanation available for this question

A mono-atomic ideal gas (ϒ = 1.67 molecular weight = 40) is compressed adiabatically from 0.1 MPs, 300K to 0.2 MPa. The universal gas constant b=is 8.314 KJ Kmol-1 K-1. The work of compression of the gas (in KJ kg-1) is

1.   29.7

2.  19.9

3.  13.3

4.  0

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4
Correct Answer :

29.7


Explanation :
No Explanation available for this question

The values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle are 2800 KJ/Kg and 1800 KJ/Kg respectively. Neglecting pump work, the specific steam consumption in kg/JW –hour is

1.  3.60

2.  0.36

3.  0.06

4.  0.01

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4
Correct Answer :

3.60


Explanation :
No Explanation available for this question

The density of air in kg/m3 at the nozzle exit is

1.  0.560

2.  0.600

3.  0.727

4.   0.800

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4
Correct Answer :

0.727


Explanation :
No Explanation available for this question

The density of air in kg/m3 at the nozzle exit is

1.  0.560

2.  0.600

3.  0.727

4.   0.800

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4
Correct Answer :

0.727


Explanation :
No Explanation available for this question

The mass flow rate of air through the nozzle in kg/s is

1.  1.30

2.  1.77

3.  1.85

4.  2.06

View Answer  
4
Correct Answer :

2.06


Explanation :
No Explanation available for this question

Steam enters an adiabatic turbine operating at steady state with an a saturated mixture at 15 kPa with quality (dryness fraction) 0.9. The enthalpies of the saturated liquid and vapour at 15 kPa are hr = 225.94J/kg mass flow rate of steam is 10kg/s. Kinetic  and potential energy changes are negligible. The energy changes are negligible. The power output of the turbine in MW is

1.  6.5

2.  8.9

3.  9.1

4.  27.0

View Answer  
4
Correct Answer :

8.9


Explanation :
No Explanation available for this question

The exit temperature of the air is

1.  516 K

2.  532 K

3.  484 K

4.  468 K

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4
Correct Answer :

484 K


Explanation :
No Explanation available for this question

The exit area of the nozzle in cm2 is

1.  90.1

2.  56.3

3.  4.4

4.  12.9

View Answer  
4
Correct Answer :

12.9


Explanation :
No Explanation available for this question

Specific enthalpy and velocity of steam at inlet and exit of a steam turbine running under steady state are as given below:   Specific enthalpy (KJ/Kg) Velocity (m/s) Inlet steam condition 3250 180 Exit steam condition 2360 5 The rate of heat loss from the turbine per kg of steam flow rate is 5 kW. Neglecting changes in potential energy of steam, the power developed in KW by the steam turbine per kg of steam flow rate, is

1.  901.2

2.  911.2

3.  17072.5

4.  17082.5

View Answer  
4
Correct Answer :

901.2


Explanation :
No Explanation available for this question
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