Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. Why starting valve is closed and valve 2 is opened while taking boiler on range in Benson boiler?
a. avoid excessive heating of tube
b. to maintain the constant flow of water
c. to avoid pressure built up in tubes
d. to avoid pipe leakages at joints
Q. What is the function of boiler?
a. to burn the fuel in a confined closed system with the supply of air
b. to generate steam at varying pressure
c. to generate steam at constant pressure
d. to produce flue gases by burning fuel at a given pressure
Q. Why single boiler unit per turbine is equipped commonly?
a. for better turbine control
b. to deduce the costs
c. for overcoming losses of power
d. to improve the efficiency
Q. How can be the plant efficiency of steam power plant is increased?
a. by using high pressure and high temperature steam
b. by equipping ash and flue gas clearance system
c. by maintaining the boiler on daily basis by cleaning the soot and combustion products
d. by using better and efficient type of fuel for combustion
Q. What is the temperature at which the steam boilers are capable to withstand?
a. 200oc
b. 280oc
c. 540oc
d. 358oc
Q. What is needed to be increased to increase the heat transfer rate in the boiler?
a. gas velocities
b. fuel input
c. water velocities
d. air supply
Q. In what is water in high pressure boiler circulated through?
a. conduits
b. cove
c. channel
d. tubes
Q. Where is water steam separator drum located in Lamont boiler?
a. inside of the boiler
b. right above the furnace
c. before the feed water pump
d. outside of boiler
Q. Which of the given boilers velocity of flue gases is greater than velocity of sound?
a. benson boiler
b. la-mont boiler
c. schmidt-hartmann boiler
d. velox boiler
Q. Which boiler is most successful boiler in the gas turbine industries?
a. because it has greater flexibility
b. it is easy to control, it’s fully automatic
c. it has higher thermal efficiency of all
d. can increase heat transfer without changing its size
Q. What type of boiler is a Velox boiler?
a. forced circulation boiler
b. natural circulation boiler
c. positively forced circulation boiler
d. once- through boiler
Q. What is used to heat the feed water which is used for recirculation through tubes?
a. condenser
b. pre-heater
c. economizer
d. water clarifier
Q. Which type of circulation is incurred in Schmidt-Hartmann boiler?
a. natural circulation
b. positive forced circulation
c. forced circulation
d. once-through circulation
Q. Why are salts deposited on the evaporator drum?
a. due to continuous circulation of water
b. due to usage of hard water containing calcium content
c. due to circulation of impure water
d. due to the chemicals added in water