Top 350+ Solved Power Plant Engineering (PPE) MCQ Questions Answer
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. Having two separate units for process heat and power is?
a. useful
b. useless
c. pollution reducing
d. none of the mentioned
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
Q. In a by-product power cycle?
a. the power is produced initially
b. power production is in the middle stages of the cycle
c. power production is after the cycle has ended
d. none of the mentioned
Q. In terms of cost per MW compared to condensing sets of the same power, the back pressure turbines are?
a. more expensive
b. cheaper
c. costly
d. none of the mentioned
Q. Which of the following is a good medium for constant temperature heating?
a. water
b. steam
c. coolant
d. diesel
Q. The cogeneration plant efficiency nCO if WT, Qi, QH represents turbine work, heat input, heat output respectively is given by?
a. nco = (wt + qi) / qh
b. nco = (wt – qi) / qh
c. nco = (wt + qh) / qi
d. nco = (wt + qh) / qi
Q. If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by?
a. (1 / m) + ((1 – e) / n)
b. (1 / n) + ((1 – e) / m)
c. (1 / m) + ((1 + e) / n)
d. (1 / n) + ((1 – e) / m)
Q. Pass-out turbines are used in which of these cases?
a. relatively high back pressure
b. small heating requirement
c. only relatively low back pressure
d. both relatively high back pressure and small heating requirement
Q. Which of these is not considered economical for cogeneration?
a. a high fraction of electric to total energy
b. a low fraction of electric to total energy
c. a low fraction of total energy to electric energy
d. none of the mentioned