Power system MCQ #7
Power system MCQ 106 to 110:
106) ________ plants have the least operating cost?
(a) Nuclear plants
(b) Hydro plants
(c) Steam plants
(d) Diesel plants.
106) ________ plants have the least operating cost?
(a) Nuclear plants
(b) Hydro plants
(c) Steam plants
(d) Diesel plants.
107) Electric power is
generated at ____ in a steam power station?
(a) 1.1 kV
(b) 440 V
(c) 11 kV
(d) 33 kV
(a) 1.1 kV
(b) 440 V
(c) 11 kV
(d) 33 kV
108) The generators for the
base load plants are usually designed for maximum efficiency around
(a) 20% overload
(b) Full load
(c) 75% full load
(d) None of these.
(a) 20% overload
(b) Full load
(c) 75% full load
(d) None of these.
109) What does the annual fixed
cost include?
(a) Interest, taxes, insurance and depreciation.
(b) Fuel, maintenance cost and labour.
(c) Both (a) and (b)
(d) None of these.
(a) Interest, taxes, insurance and depreciation.
(b) Fuel, maintenance cost and labour.
(c) Both (a) and (b)
(d) None of these.
110) What is the tariff?
(a) It is a rate at which electrical energy is produced in the plant.
(b) It is a rate at which electrical energy is supplied to the consumers.
(c) Both (a) and (b).
(d) None of these
(a) It is a rate at which electrical energy is produced in the plant.
(b) It is a rate at which electrical energy is supplied to the consumers.
(c) Both (a) and (b).
(d) None of these
ANSWER: | 106-b | 107-c | 108-b | 109-a | 110-b |
Power system MCQ 111 to 115:
111) Domestic consumers are
charged?
(a) Flat demand tariff.
(b) Block rate tariff.
(c) Flat rate tariff.
(d) Off peak tariff.
(a) Flat demand tariff.
(b) Block rate tariff.
(c) Flat rate tariff.
(d) Off peak tariff.
112) Why is a big consumer
charged at a lower rate than the small consumer?
(a) Their maximum demand is small.
(b) It improves the load factor.
(c) Both (a) and (b).
(d) None of these.
(a) Their maximum demand is small.
(b) It improves the load factor.
(c) Both (a) and (b).
(d) None of these.
113) Lower power factor is
usually not due to
(a) Incandescent lamps.
(b) Arc lamps.
(c) Discharge lamp.
(d) Induction furnace.
(a) Incandescent lamps.
(b) Arc lamps.
(c) Discharge lamp.
(d) Induction furnace.
114) What is the drawback of
using paper as the insulating material?
(a) It is hygroscopic
(b) Has a very low insulation resistivity
(c) Has poor dielectric strength
(d) Has high capacitance
(a) It is hygroscopic
(b) Has a very low insulation resistivity
(c) Has poor dielectric strength
(d) Has high capacitance
115)
What is empire tape?
(a) Enamel insulation
(b) Varnished cambric
(c) Impregnated paper
(d) Vulcanised rubber
(a) Enamel insulation
(b) Varnished cambric
(c) Impregnated paper
(d) Vulcanised rubber
ANSWER: | 111-b | 112-b | 113-a | 114-a | 115-b |
Power system MCQ 116 to 120:
(a) Single core
(b) Two core
(c) Three core
(d) All of the above
(b) Two core
(c) Three core
(d) All of the above
117) __________ consumers are
penalty imposed for low power factor?
(a) Agricultural
consumers
(b) Industrial consumers.
(c) Residential and commercial consumers.
(d) All of the above
(b) Industrial consumers.
(c) Residential and commercial consumers.
(d) All of the above
118)
The charging current drawn by the cable _____________.
(a) Leads the voltage by
90°
(b) Lags behind the voltage by 90°
(c) Are in phase with each other
(d) Leads the voltage by 60°
(b) Lags behind the voltage by 90°
(c) Are in phase with each other
(d) Leads the voltage by 60°
119)
What is the source of heat generation in cables?
(a) Dielectric losses in
cable insulation
(b) Copper loss in conductor
(c) Losses in metallic sheathings and armouring
(d) All of these
(b) Copper loss in conductor
(c) Losses in metallic sheathings and armouring
(d) All of these
120)
__________ concept is electrically short, medium and long lines based?
(a) Nominal voltage of
the line
(b) Wavelength of the line
(c) Physical length of the line
(d) Power transmitted over the line
(b) Wavelength of the line
(c) Physical length of the line
(d) Power transmitted over the line
ANSWER: | 11-c | 12-b | 13-d | 14-d | 15-c |
Leave a Comment