Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. In which type of cooling system are nozzles arranged on different elevation?
a. single deck system
b. double deck system
c. natural flow system
d. direct flow system
Q. What are used in the direct flow system to transverse the pond before uniting at intake?
a. separators
b. filters
c. baffle walls
d. porous pipes
Q. Select the disadvantage of cooling pond out of the given?
a. the area required of cooling in a cooling pond is small
b. spray losses due to evaporation and windage run high
c. there is no control over the temperature of cooled water
d. the cooling efficiency is low compared with cooling water
Q. What type of cooling system is used in the large power plants?
a. cooling ponds
b. natural flow system
c. cooling towers
d. single deck system
Q. How does outside air enter into the wet cooling system?
a. air vents
b. louvers
c. tuyeres
d. vacuum
Q. How is water circulated throughout the dry cooling tower system?
a. finned tubes
b. metal pipes
c. porous tubes
d. swirling tubes
Q. Why is exhaust steam coming out of turbine is admitted to a steam header?
a. to increase the pressure
b. to decrease the velocity
c. to decrease the pressure drop
d. to control the pollution
Q. In which system is Cooling of hot water is done on tray as step by?
a. mechanical draught cooling system
b. hyperbolic cooling tower
c. atmospheric cooling tower
d. wet cooling tower
Q. How is air produced in mechanical draught cooling tower?
a. air tuyeres
b. propeller fans
c. air blowers
d. louvre
Q. Why is induced draught considered better than the forced draught?
a. because power requirement is high for forced draught
b. maintenance of induced draught fan is costlier
c. forced draught is less efficient
d. forced draught produces less amount of speed of air
Q. What is the function of fusible plug in the boiler?
a. protect the fire tube
b. to trip on overload
c. to act as a junction switch
d. to maintain pressure
Q. What is the function of safety valves in the boiler?
a. to prevent excessive steam pressure
b. to prevent excessive air pressure
c. to prevent water pressure
d. to prevent from rising temperatures
Q. What happens due to high temperature of feeds water in the economizer?
a. fuel consumption increases
b. fuel mechanical efficiency increases
c. fuel consumption decreases
d. fuel mechanical efficiency decreases
Q. What is the function of superheater in the boiler?
a. increase the temperature of steam
b. reheat the steam
c. superheat the feed water
d. to heat the fuel gas