Top 350+ Solved Power Plant Engineering (PPE) MCQ Questions Answer
Q. Which medium is used to carry ash in the pneumatic ash handling system?
a. conveyor belt
b. water trough
c. air
d. chain belt
Q. Which system is noisy out of all the following ash handling systems?
a. steam jet ash handling system
b. mechanical ash handling system
c. pneumatic ash handling system
d. hydraulic ash handling system
Q. What would be the amount of distance that a low pressure system could carry the ash?
a. 25m
b. 500m
c. 150m
d. 800m
Q. What is the capacity of low pressure hydraulic ash handling system?
a. 80 tonnes/hour
b. 22 tonnes/hour
c. 50 tonnes/hour
d. 10 tonnes/hour
Q. Which of these terms defines the pressure difference in the furnace?
a. draught
b. duct
c. stack
d. chimney
Q. Which of these is not a type of mechanical draft system for a furnace?
a. balanced draft
b. induced draft
c. forced draft
d. actuated draft
Q. Stack heat losses can be minimised by
a. using low c.v. fuels
b. controlling the excess air
c. oxygen enrichment of combustion air
d. maintaining proper draft in the furnace
Q. Which of these accentuates clinkering trouble on furnace grate burning coal?
a. low reactivity of carbonised residue containing high proportions of iron and sulphur
b. low forced draught and low fuel bed temperature
c. thick fire bed and preheated primary air
d. all of the mentioned
Q. Natural draught produced by a chimney depends upon
a. density of chimney gases
b. height of chimney
c. both ‘density of chimney gases’ and ‘height of chimney’
d. none of the mentioned
Q. In a furnace employing forced draught compared to induced draught
a. the fan operates hot and hence blades are liable to corrosion and erosion
b. positive pressure exists in the furnace
c. air is sucked in, so air leaks are more and hence furnace efficiency is reduced
d. none of the mentioned
Q. Which of the following types of the fans has the highest cost?
a. centrifugal fans
b. axial fans
c. primary fans
d. gas recirculation fans
Q. Which of these is not a type of drive of variable speed control?
a. variable speed turbine
b. hydraulic coupling
c. multiple speed ac motor
d. electronically adjustable turbine drive
Q. Which of the following is not a reason of heating feed water?
a. it improves overall efficiency
b. it removes dissolved impurities
c. it prevents from thermal stress which may cause due to enter of cold water into boiler
d. it produces steam from feed water
Q. Feed water for boiler of thermal power plant is obtained from:
a. natural sources like river and lake
b. partly from condensed steam and natural sources
c. condensed steam and small percentage from natural resources
d. natural sources and small percentage from condensed steam