Top 550+ Solved Energy Conversion MCQ Questions Answer
Q. Skin effect results in
a. reduced effective resistance but increased effective internal reactance of the conductor
b. increased effective resistance but reduced effective internal reactance of the conductor
c. reduced effective resistance as well as effective internal reactance
d. increased effective resistance as well as effective internal reactance
e. None of the above
Q. Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant?
a. Use of high pressures
b. Reheating of steam at some intermediate stage
c. Regeneration
d. All of the above
e. None of the above
Q. Which of the following disadvantages occurs due to low power factor?
a. Greater conductor size
b. Poor voltage regulation
c. Large copper losses
d. Large KVA rating of transformers
e. All of the above
Q. Which of the following statement is incorrect?
a. As the temperature rises the tension in the transmission line decreases
b. As the temperature rises the sag in transmission lines reduces
c. Tension and sag in transmission lines are complementary to each other
d. None of the above
Q. In geothermal power plants waste water is
a. recirculated after cooling in cooling towers
b. discharged into sea
c. discharged back to earth
d. evaporated in ponds
e. None of the above
Q. In pumped storage plant
a. Power is produced by pumps
b. Water is stored by pumping to high pressures
c. Water is recirculated through turbines
d. Downstream water is pumped upstream during off-load periods
e. Pressure accumulators are used
Q. The effect of corona can be reduced by
a. Increasing the conductor size and reducing the spacing between the conductors
b. Increasing the conductor size and also by increasing the spacing between the conductors
c. Reducing the conductor size and increasing the spacing between conductors
d. Reducing the conductor size as well as spacing between the conductors
e. None of the above
Q. Which of the following fuel consists almost entirely of fixed carbon and ash?
a. Lignite
b. peat
c. wood charcoal
d. coke
e. None of the above
Q. ACSR conductor implies
a. All conductors surface treated and realigned
b. Anode current sinusoidally run
c. Anodised core smoothly run
d. Aluminium conductor steel reinforced
e. None of the above
Q. Turnaround efficiency of battery energy storage system is around
a. 75 percent
b. 50 percent
c. 25 percent
d. 10 percent
e. None of the above
Q. Coal broken into angular fragments is known as
a. coal briquettes
b. coal breccia
c. coal bank
d. coal auger
e. None of the above
Q. A graphical representation of discharge and time is known as
a. Load duration curve
b. Monograph
c. Hydrograph
d. Load curve
e. Hectograph
Q. Pulverized coal is fed to the boiler through
a. stokers
b. retorts
c. fans
d. burners
e. None of the above
Q. In solar thermal conversion systems the solar heat is transferred to
a. water - steam
b. liquid metals
c. molten salts
d. any of the above
e. None of the above
Q. Fixed carbon in case of bituminous coals is less than
a. 70%
b. 50%
c. 35%
d. 15%
e. None of the above