Top 350+ Solved Power Plant Engineering (PPE) MCQ Questions Answer
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. 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. 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
Q. Mechanical method of water treatment is done to
a. heat the feed water
b. to remove solid matter and impurities
c. to add some solid materials
d. to remove dissolved gases
Q. Which method is used in large modern thermal power plants to heat feed water?
a. open type heatre is used
b. close type heater is used
c. steam is directly taken from main turbine and used to heat it feed water
d. surface type heater is used
Q. Thermal treatment methods used to remove impurities like:
a. dissolved carbon dioxide and other gases
b. solid materials
c. carbonate
d. bacterial impurities
Q. Chemical method of treatment is used for treatment of:
a. diissolve gases
b. carbonate and carbon dioxide
c. bacterial impurities
d. send and suspended materials
Q. A plant producing both, electrical power & process heat simultaneously is?
a. cogenital plant
b. cogenerial plant
c. cogeneration plant
d. conglomerate plant
Q. In a back pressure turbine
a. pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
b. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
c. pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process
d. none of the mentioned