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