Steam Condensers Cooling Towers multiple choice questions

 Steam Condensers Cooling Towers

1. Based on the material, with which the towers are made, cooling towers are classified into _____
a) Timber towers, Concrete towers and Alloy duct type
b) Induced and forced draught type
c) Induced and natural draught type
d) Timber towers, Concrete towers and Steel duct type
Answer: Timber towers, Concrete towers and Steel duct type
2. Humidity of air affects the cooling of water in a cooling tower.
a) True
b) False
Answer: True
3. Which of the following phenomenon is used to cool water in a cooling tower?
a) Evaporation
b) Radiation
c) Condensation
d) Conduction
Answer: Evaporation
4. The cooling of water is affected by degree of uniformity in descending water.
a) True
b) False
Answer: True
5. What is the function of a cooling tower in a power plant?
a) It cools the hot water coming back from the condenser
b) It cools the hot water being supplied to the condenser
c) It heats the cold water coming back from the condenser
d) It heats the cold water being supplied to the condenser
Answer: It cools the hot water coming back from the condenser
6. Which of the following statements about concrete towers is FALSE?
a) Concrete towers have large capacity (of the order 5 x 103 m3/h)
b) Longer life than timber towers
c) Concrete towers have good stability under air pressure
d) Concrete towers require frequent maintenance
Answer: Concrete towers require frequent maintenance
7. Which of the following statements regarding cooling towers is FALSE?
a) Concrete towers have longer life than timber tower
b) Timber towers have high maintenance charges
c) Duct-type cooling towers have small capacity
d) Cooling towers are used to cool down the water being supplied to the boiler of the power plant
Answer: Cooling towers are used to cool down the water being supplied to the boiler of the power plant
8. The ratio of actual vaccum to the ideal vaccum in a condenser is called__________
a) Condenser efficiency
b) Vaccum efficiency
c) Boiler efficiency
d) Nozzle efficiency
Answer: Vaccum efficiency
9. Which of the following statements about duct type cooling towers is TRUE?
a) They are widely used in modern power plants
b) Their water handling capacity is small
c) On continued exposure to wind, water and sun, they rot
d) They have short life
Answer: Their water handling capacity is small
10. Which of the following statements about timber towers is False?
a) Timber towers have longer life than concrete and steel duct type towers
b) Timber towers have high maintenance charges
c) Timber towers have limited cooling capacity
d) Timber towers are rarely used
Answer: Timber towers have longer life than concrete and steel duct type towers