Power Plant Engineering Mock Test 6

10%

Question 1 of 10

1. What is the pour point of fuel oil?

Temperature at which it solidifies or congeals

It catches fire without external aid

Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

Question 1 of 10

Question 2 of 10

2. If d is the diffusion coefficient and t is the boundary layer thickness. Then the mass transfer coefficient k is given by?

k = d / t

k = d x t

k = d – t

k = d + t

Question 2 of 10

Question 3 of 10

3. In order to eliminate knocking in compression ignition engines, there should be __________

short delay period

high self-ignition temperature of fuel

low compression ratio

late auto-ignition

Question 3 of 10

Question 4 of 10

4. Which of the following has the highest calorific value?

Lignite

Sub-bituminous

Peat

Anthracite

Question 4 of 10

Question 5 of 10

5. Number of working strokes per min. for a two stroke cycle engine are __________ the speed of the engine in r.p.m.

twice

four-times

equal to

one-half

Question 5 of 10

Question 6 of 10

6. Manometric head, in case of a centrifugal pump, is equal to __________

All of the mentioned

Workdone per kN of water - Losses within the impeller

Energy per kN at outlet of impeller - Energy per kN at inlet of impeller

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

Question 6 of 10

Question 7 of 10

7. The fuels in order of decreasing knock tendency for spark ignition engines are __________

Napthene, paraffin, aromatic

Paraffin, napthene, aromatic

Paraffin, aromatic, napthene

Napthene, aromatics, paraffin

Question 7 of 10

Question 8 of 10

8. The ignition quality of petrol is expressed by __________

Cetane number

Octane number

Calorific Value

None of the mentioned

Question 8 of 10

Question 9 of 10

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

specific velocity

specific speed

unit speed

terrific speed

Question 9 of 10

Question 10 of 10

10. Discharge of a centrifugal pump is __________

inversely proportional to (diameter)² of its impeller

directly proportional to diameter of its impeller

directly proportional to (diameter)² of its impeller

inversely proportional to diameter of its impeller

Question 10 of 10