Power Plant Engineering Practice Test 6

1. Height of coke oven is limited (say maximum up to 7 metres) mainly by the __________

problem in door cleaning

buckling of ram of pusher car at the time of coke pushing

problem of uniform heating along its height.

structural strength of silica bricks

2. The maximum adiabatic flame temperature is attained when the fuel is burnt with __________

theoretically required amount of oxygen

more than theoretically required amount of air

less than theoretically required amount of air

theoretically required amount of air

3. In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

above

equal to

below

middle

4. Which of the following pump is preferred for flood control and irrigation applications?

Axial flow pump

Centrifugal pump

Mixed flow pump

Reciprocating pump

5. The expansion of fuel in a four stroke cycle diesel engine __________

may start and end anywhere

starts at 15° before top dead centre and ends at 30° after top dead centre

starts at top dead centre and ends at 30° after top dead centre

starts at 15° after top dead centre and ends at 30° before bottom dead centre

6. The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, will be?

60%

80%

50%

40%

7. The thermal efficiency of diesel engines is about __________

70%

15%

30%

50%

8. The specific fuel consumption per B.P. hour for a petrol engine is about __________

0.2 kg

0.35 kg

0.25 kg

0.3 kg

9. What is the maximum temperature in the I.C. engine cylinder is of the order of(in degree Celsius)?

500-1000

2000-2500

1000-1500

1500-2000

10. The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as?

terrific speed

unit speed

specific velocity

specific speed