Power Plant Engineering Practice Test 3

1. The relation between heat rate & efficiency is?

they are independent of each other

both are inversely proportional

heat rate is also called efficiency

both are directly proportional

2. Which of these is not an application of back pressure turbine?

desalination of sea water

filtration of water

process industries

petrochemical installations

3. What is the location of low pressure heaters?

before the deaerator

depends on pressure conditions

after the deaerator

middle of deaerator

4. Having two separate units for process heat and power is?

none of the mentioned

pollution reducing

useless

useful

5. What is the exhaust condition of a Watt's Beam Engine?

near saturation

dry

wet

0.9 dry

6. The overall efficiency n_overall of a steam power plant is given by?

none of the mentioned

n_overall = (power available at the generator terminals + (Fuel burning rate x Calorific Value of the fuel))

n_overall = (power available at the generator terminals - (Fuel burning rate x Calorific Value of the fuel))

n_overall = (power available at the generator terminals / (Fuel burning rate x Calorific Value of the fuel))

7. The output of the boiler heat pump is to?

the low pressure heater

the high pressure heater

simultaneously to the low & high pressure heaters

none of the mentioned

8. Which of the following is a good medium for constant temperature heating?

Water

Steam

Diesel

Coolant

9. Net positive suction head(NPSH) is provided because?

none of the mentioned

to prevent friction

to prevent cavitation

to prevent vapour lock

10. Which of these is not considered economical for cogeneration?

none of the mentioned

a high fraction of electric to total energy

a low fraction of electric to total energy

a low fraction of total energy to electric energy