Top 80+ Solved Electric Energy Generation Utilization and Conservation MCQ Questions Answer
Q. Which of the following types of filters used in the air conditioning system is made of cloth that is discarded on getting dirty?
a. viscous type filters
b. dry filter
c. spray washers
d. electric precipitators
Q. The process of extraction of the certain required amount of water from air is known as
a. heating
b. cooling
c. humidification
d. dehumidification
Q. Which of the following is capable of absorbing excess moisture from the air?
a. silica gel
b. charcoal
c. salts of calcium or ammonia
d. activated alumina
Q. Magnetic materials are heated with the help of
a. hysteresis loss
b. electric arc
c. electric current
d. radiation.
Q. In the indirect resistance heating method, heat is delivered to the charge
a. direcly
b. by radiation
c. by convection
d. both (b) and (c).
Q. Electric ovens using heating elements of........................... can produce temperatures up to 3000°C
a. nickel
b. graphite
c. chromium
d. iron.
Q. Which of the following heating method is based on the transformer principle ?
a. resistance heating
b. eddy-current heating
c. induction heating
d. dielectric heating.
Q. Which of the following furnace suffers from pinch effect?
a. resistance furnace
b. core type induction furnace
c. coreless induction furnace
d. vertical core type induction furnace.
Q. The coreless induction furnace uses high-frequency electric supply in order to obtain high
a. flux density
b. eddy-current loss
c. primary resistance
d. power factor.
Q. Spot welding is used for
a. thin metal sheets
b. rough and irregular surfaces
c. costings only
d. thick sections
Q. Which of the following is an advantages of heating by electricity?
a. quicker operation
b. higher efficiency
c. absence of flue gases
d. all of the above
Q. ...... method has leading power factor
a. resistance heating
b. dielectric heating
c. arc heating
d. induction heating
Q. Which of the following methods of heating is not dependent on the frequency of supply?
a. induction heating
b. dielectric heating
c. electric resistance heating
d. all of the above
Q. When a body reflects entire radiation incident on it, then it is known as
a. white body
b. grey body
c. black body
d. transparent body