Electrical Power Plant Objective Questions and Answers - Set 07 - ObjectiveBooks

Electrical Power Plant Objective Questions and Answers - Set 07

Practice Test: Question Set - 07


1. Secondary air is the air used to
    (A) Reduce the flame length
    (B) Increase the flame length
    (C) Transport and dry the coal
    (D) Provide air round the burners for getting optimum combustion

2. The value of the reheat factor is of the order of
    (A) 0.8 to 1.0
    (B) 1.0 to 1.05
    (C) 1.1 to 1.5
    (D) Above 1.5

3. The main source of production of biogas is
    (A) Human waste
    (B) Wet cow dung
    (C) Wet livestock waste
    (D) All of the above

4. A steam power station requires space
    (A) Equal to diesel power station
    (B) More than diesel power station
    (C) Less than diesel power station
    (D) None of the above

5. For the same draught produced the power of induced draught fan as compared to forced draught fan is
    (A) Less
    (B) More
    (C) Same
    (D) Not predictable

6. The effect of considering friction losses in steam nozzle for the same pressure ratio leads to
    (A) Increase in exit velocity from the nozzle
    (B) Decrease in exit velocity from the nozzle
    (C) No change in exit velocity from the nozzle
    (D) Increase or decrease depending upon the exit quality of steam

7. In steam turbines the reheat factor
    (A) Increases with the increase in number of stages
    (B) Decreases with the increase in number of stages
    (C) Remains same irrespective of number of stages
    (D) None of the above

8. Pipes carrying steam are generally made up of
    (A) Steel
    (B) Cast iron
    (C) Copper
    (D) Aluminium

9. Bucket elevators are used for
    (A) Carrying coal in horizontal direction
    (B) Carrying coal in vertical direction
    (C) Carrying coal in any direction
    (D) None of the above

10. In a shell and tube surface condenser
    (A) Steam and cooling water mix to give the condensate
    (B) Cooling water passes through the tubes and steam surrounds them
    (C) Steam passes through the cooling tubes and cooling water surrounds them
    (D) All of the above varying with situation

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