Electrician trade theory paper I semester IV question paper with answer August 2016
Paper- I
ELECTRICIAN
( Trade Theory)
SEMESTER - IV
Note: attempt all questions.
All Questions carry equal marks.
This paper carries negative marking 25% marks will be detected for each wrong answer.
Time: 3 HRS. Marks: 150
Choose the correct answer.
Q.1) number of poles in MCB (TPN) is...
A) 2 Poles
B) 4 Poles
C) 3 poles
D) 5 poles
Answer: B) 4 Poles
Q.2) AC is converted into DC by
A) alternator
B) motor
C) transformer
D) rectifier
Answer: D) rectifier
Q.3) The material used for the fuse wire should be of....
A) low resistivity and high melting point
B) high resistivity and high melting point
C) high resistivity and low melting point
D) low resistivity and low melting point
Answer: C) high resistivity and low melting point
Q.4) bucholz relay is generally used for the protection of...
A) transmission
B) line alternator
C) transformer
D) Motors
Answer: C) transformer
Q.5) MCB stands for ...
A) miniature circuit breaker
B) minimum capacity breaker
C) molded circuit breaker
D) maximum capacity breaker
Answer: A) miniature circuit breaker
Q.6) which of the following is not a type of fuse?
A) HRC
B) semi enclosed rewirable
C) ceramic
D) none of these
Answer: C) ceramic
Q.7) inside the geyser there is a....
A) filament
B) immersion rod
C) both a and b
D) none of these
Answer: B) immersion rod
Q.8) out of the following which one is not a non conventional (renewable) source of energy?
A) tidal energy
B) geothermal energy
C) nuclear energy
D) wind energy
Answer: C) nuclear energy
Q.9) coal used in thermal power plant has Ash content of ...
A) about 5%
B) about 10%
C) about 20%
D) about 0%
Answer: C) about 20%
Q.10) the efficiency of a thermal power plant is about ....
A) 100%
B) 85%
C) 80%
D) 35%
Answer: D) 35%
Q.11) which of the following is conventional source of energy?
A) Coal
B) solar
C) small hydro
D) wind
Answer: A) Coal
Q.12) the rating of fuse always expressed in...
A) Volts
B) Amperes
C) Ampere-Volts
D) Ampere-Hour
Answer: B) Amperes
Q.13) which of the following has the highest grid connected installed capacity ....
A) solar
B) Biomass
C) wind
D) small hydro
Answer: A) solar
Q.14) which of the following is a form of biomass?
A) Woody
B) Crop residues
C) Animal dung
D) All of these
Answer: D) All of these
Q.15) in a thermal power plant cooling towers are used to ....
A) condense low pressure steam
B) cool condensed steam
C) Cool Water used in condenser for condensing steam
D) cool feed water of boiler
Answer: C) Cool Water used in condenser for condensing steam
Q.16) gas turbine is widely used in ...
A) pumping station
B) aircraft
C) locomotives
D) automobiles
Answer: B) aircraft
Q.17) advantage of hydroelectric power station is...
A) low operating cost
B) free from pollution problems
C) no transportation problems
D) all of the above
Answer: D) all of the above
18) Bagasse is.....
A) A variety of coal
B) A fuel consisting of wood etc.
C) fibrous portion of sugarcane left after extracting the juice
D) A kind of rice straw
Answer: C) fibrous portion of sugarcane left after extracting the juice
19) Geothermal Energy is...
A) A renewable energy resource
B) alternative energy source
C) Inexhaustible energy sources
D) any of the above
Answer: D) any of the above
20) The disadvantage of renewable source of energy is ...
A) Requires backup
B) availability in low energy densities
C) intermittency
D) all of the above
Answer: D) all of the above
21) Photovoltaic solar energy conversion system makes use of ...
A) fuel cell
B) solar cell
C) solar pond
D) solar collectors
Answer: B) solar cell
22) which power plant is free from environmental hazardous pollution problems?
A) thermal power plant
B) nuclear power plant
C) wind power plant
D) all of the above
Answer: C) wind power plant
23) objectives of electrical power transmission is/are....
A) Transmission system must be more efficient with minimum line losses
B) voltage regulation of the transmission line must be zero or minimum
C) both A and B
D) none of these
Answer: C) both A and B
24) advantages of highest transmission voltage is are...
A) Power transfer capability of transmission line is increased
B) transmission line losses are reduced
C) area of cross section and volume of the conductor is reduced
D) all of these
Answer: D) all of these
Q.25) horizontal axis and vertical Axis are the type of ...
A) nuclear reactor
B) wind mills
C) biogas reactor
D) solar cell
Answer: B) wind mills
Q.26) in a fuel cell electrical energy is produced by ....
A) reaction of hydrogen with oxygen
B) thermionic action
C) combustion of fuel in the absence of oxygen
D) none of these
Answer: A) reaction of hydrogen with oxygen
Q.27) by which of the following system electric power may be transmitted ....
A) overhead system
B) underground system
C) both a and b
D) none of the above
Answer: C) both a and b
Q.28) which of the following materials is not used for Transmission and distribution of electrical power ?
A) copper
B) aluminium
C) both a and b
D) tungsten
Answer: D) tungsten
Q.29) The operating frequency (AC) of India is ...
A) 0 Hz
B) 50 Hz
C) 60 Hz
D) 100 Hz
Answer: B) 50 Hz
Q.30) The voltage of single phase supply to residential consumer is ....
A) 110 V
B) 210 V
C) 230 V
D) 400 V
Answer: C) 230 V
Q.31) The conductors of the overhead lines are mainly ...
A) solid
B) stranded
C) Hollow
D) none of these
Answer: B) stranded
Q.32) transmission line string insulators are mainly made of ...
A) glass
B) porcelain
C) iron
D) PVC
Answer: B) porcelain
Q.33) a fuse is ....
A) always connected in series with the circuit
B) always connected in parallel with the circuit
C) normally connected in the series with the circuit
D) normally connected in parallel with the circuit
Answer: A) always connected in series with the circuit
Q.34) pin type insulators are generally not used for voltage beyond
A) 1 kV
B) 11kV
C) 22 kV
D) 33kV
Answer: D) 33kV
Q.35) which of the following faults is most likely to occur in cables?
A) Cross or short circuit fault
B) open circuit fault
C) breakdown of cable insulation
D) all of these
Answer: D) all of these
Q.36) which of the following insulation is used in cables ?
A) varnished cambric
B) rubber
C) paper
D) all of these
Answer: D) all of these
Q.37) the bedding on a cable consists of ...
A) hessian cloth
B) jute
C) both A and B
D) none of these
Answer: C) both A and B
Q.38) the insulating material for cables should ...
A) be acid proof
B) be non inflammable
C) being non hygroscopic
D) have all above properties
Answer: D) have all above properties
Q.39) in a cable immediately above metallic sheath .... is provided
A) earthing connection
B) Bedding
C) armouring
D) none of these
Answer: B) Bedding
Q.40) low tension cables are generally used upto ....
A) 200 V
B) 500 V
C) 700V
D) 1000 V
Answer: D) 1000 V
Q.41) in the cables the location of fault is usually found out by comparing ...
A) the resistance of conductor
B) the inductance of conductors
C) the capacitance of insulated conductors
D) all above parameters
Answer: C) the capacitance of insulated conductors
Q.42) underground cables are laid at sufficient depth ...
A) to minimize temperature stresses
B) to avoid being underhed easily due to removal of soil
C) to minimize the effect of shocks and vibrations due to passing vehicles, etc
D) for all of the above reasons
Answer: C) to minimize the effect of shocks and vibrations due to passing vehicles, etc
Q.43) boiling water reactor and pressurized water reactors are ....
A) nuclear reactor
B) solar reactor
C) OTECH
D) biogas Reactor
Answer: A) nuclear reactor
Q.44) Lignite bituminous and anthracite are different ranks of
A) nuclear fuel
B) coal
C) natural gas
D) biogas
Answer: B) coal
Q.45) both power and manure is provided by ....
A) nuclear plants
B) thermal plants
C) biogas plants
D) hydroelectric plant
Answer: C) biogas plants
Q.46) the insulation of the cable decreases with ...
A) the increase in length of the insulation
B) the decrease in length of the insulation
C) either A or B
D) none of these
Answer: A) the increase in length of the insulation
Q.47) in the cables, sheaths are used to ...
A) prevent the moisture from entering the cable
B) provide enough strength
C) provide proper insolation
D) none of the above
Answer: A) prevent the moisture from entering the cable
Q.48) the use of strain type insulator are used ....
A) At dead ended
B) for voltage lines less than 11 kV
C) sharp curve
D) all of these
Answer: A) At dead ended
Q.49) safety factor of insulator is the ratio of ...
A) puncture strength to flash over voltage
B) flash over voltage to puncture strength
C) flash over voltage to line voltage
D) line voltage to flash over voltage
Answer: A) puncture strength to flash over voltage
Q.50) power factors can be improved by ....
A) static capacitor
B) synchronous condenser
C) phase advances
D) all of these
Answer: D) all of these
If you have any difficulties or problem in these questions paper please comment to improve the knowledge. Thanks.
ELECTRICIAN
( Trade Theory)
SEMESTER - IV
Note: attempt all questions.
All Questions carry equal marks.
This paper carries negative marking 25% marks will be detected for each wrong answer.
Time: 3 HRS. Marks: 150
Choose the correct answer.
Q.1) number of poles in MCB (TPN) is...
A) 2 Poles
B) 4 Poles
C) 3 poles
D) 5 poles
Answer: B) 4 Poles
Q.2) AC is converted into DC by
A) alternator
B) motor
C) transformer
D) rectifier
Answer: D) rectifier
Q.3) The material used for the fuse wire should be of....
A) low resistivity and high melting point
B) high resistivity and high melting point
C) high resistivity and low melting point
D) low resistivity and low melting point
Answer: C) high resistivity and low melting point
Q.4) bucholz relay is generally used for the protection of...
A) transmission
B) line alternator
C) transformer
D) Motors
Answer: C) transformer
Q.5) MCB stands for ...
A) miniature circuit breaker
B) minimum capacity breaker
C) molded circuit breaker
D) maximum capacity breaker
Answer: A) miniature circuit breaker
Q.6) which of the following is not a type of fuse?
A) HRC
B) semi enclosed rewirable
C) ceramic
D) none of these
Answer: C) ceramic
Q.7) inside the geyser there is a....
A) filament
B) immersion rod
C) both a and b
D) none of these
Answer: B) immersion rod
Q.8) out of the following which one is not a non conventional (renewable) source of energy?
A) tidal energy
B) geothermal energy
C) nuclear energy
D) wind energy
Answer: C) nuclear energy
Q.9) coal used in thermal power plant has Ash content of ...
A) about 5%
B) about 10%
C) about 20%
D) about 0%
Answer: C) about 20%
Q.10) the efficiency of a thermal power plant is about ....
A) 100%
B) 85%
C) 80%
D) 35%
Answer: D) 35%
Q.11) which of the following is conventional source of energy?
A) Coal
B) solar
C) small hydro
D) wind
Answer: A) Coal
Q.12) the rating of fuse always expressed in...
A) Volts
B) Amperes
C) Ampere-Volts
D) Ampere-Hour
Answer: B) Amperes
Q.13) which of the following has the highest grid connected installed capacity ....
A) solar
B) Biomass
C) wind
D) small hydro
Answer: A) solar
Q.14) which of the following is a form of biomass?
A) Woody
B) Crop residues
C) Animal dung
D) All of these
Answer: D) All of these
Q.15) in a thermal power plant cooling towers are used to ....
A) condense low pressure steam
B) cool condensed steam
C) Cool Water used in condenser for condensing steam
D) cool feed water of boiler
Answer: C) Cool Water used in condenser for condensing steam
Q.16) gas turbine is widely used in ...
A) pumping station
B) aircraft
C) locomotives
D) automobiles
Answer: B) aircraft
Q.17) advantage of hydroelectric power station is...
A) low operating cost
B) free from pollution problems
C) no transportation problems
D) all of the above
Answer: D) all of the above
18) Bagasse is.....
A) A variety of coal
B) A fuel consisting of wood etc.
C) fibrous portion of sugarcane left after extracting the juice
D) A kind of rice straw
Answer: C) fibrous portion of sugarcane left after extracting the juice
19) Geothermal Energy is...
A) A renewable energy resource
B) alternative energy source
C) Inexhaustible energy sources
D) any of the above
Answer: D) any of the above
20) The disadvantage of renewable source of energy is ...
A) Requires backup
B) availability in low energy densities
C) intermittency
D) all of the above
Answer: D) all of the above
21) Photovoltaic solar energy conversion system makes use of ...
A) fuel cell
B) solar cell
C) solar pond
D) solar collectors
Answer: B) solar cell
22) which power plant is free from environmental hazardous pollution problems?
A) thermal power plant
B) nuclear power plant
C) wind power plant
D) all of the above
Answer: C) wind power plant
23) objectives of electrical power transmission is/are....
A) Transmission system must be more efficient with minimum line losses
B) voltage regulation of the transmission line must be zero or minimum
C) both A and B
D) none of these
Answer: C) both A and B
24) advantages of highest transmission voltage is are...
A) Power transfer capability of transmission line is increased
B) transmission line losses are reduced
C) area of cross section and volume of the conductor is reduced
D) all of these
Answer: D) all of these
Q.25) horizontal axis and vertical Axis are the type of ...
A) nuclear reactor
B) wind mills
C) biogas reactor
D) solar cell
Answer: B) wind mills
Q.26) in a fuel cell electrical energy is produced by ....
A) reaction of hydrogen with oxygen
B) thermionic action
C) combustion of fuel in the absence of oxygen
D) none of these
Answer: A) reaction of hydrogen with oxygen
Q.27) by which of the following system electric power may be transmitted ....
A) overhead system
B) underground system
C) both a and b
D) none of the above
Answer: C) both a and b
Q.28) which of the following materials is not used for Transmission and distribution of electrical power ?
A) copper
B) aluminium
C) both a and b
D) tungsten
Answer: D) tungsten
Q.29) The operating frequency (AC) of India is ...
A) 0 Hz
B) 50 Hz
C) 60 Hz
D) 100 Hz
Answer: B) 50 Hz
Q.30) The voltage of single phase supply to residential consumer is ....
A) 110 V
B) 210 V
C) 230 V
D) 400 V
Answer: C) 230 V
Q.31) The conductors of the overhead lines are mainly ...
A) solid
B) stranded
C) Hollow
D) none of these
Answer: B) stranded
Q.32) transmission line string insulators are mainly made of ...
A) glass
B) porcelain
C) iron
D) PVC
Answer: B) porcelain
Q.33) a fuse is ....
A) always connected in series with the circuit
B) always connected in parallel with the circuit
C) normally connected in the series with the circuit
D) normally connected in parallel with the circuit
Answer: A) always connected in series with the circuit
Q.34) pin type insulators are generally not used for voltage beyond
A) 1 kV
B) 11kV
C) 22 kV
D) 33kV
Answer: D) 33kV
Q.35) which of the following faults is most likely to occur in cables?
A) Cross or short circuit fault
B) open circuit fault
C) breakdown of cable insulation
D) all of these
Answer: D) all of these
Q.36) which of the following insulation is used in cables ?
A) varnished cambric
B) rubber
C) paper
D) all of these
Answer: D) all of these
Q.37) the bedding on a cable consists of ...
A) hessian cloth
B) jute
C) both A and B
D) none of these
Answer: C) both A and B
Q.38) the insulating material for cables should ...
A) be acid proof
B) be non inflammable
C) being non hygroscopic
D) have all above properties
Answer: D) have all above properties
Q.39) in a cable immediately above metallic sheath .... is provided
A) earthing connection
B) Bedding
C) armouring
D) none of these
Answer: B) Bedding
Q.40) low tension cables are generally used upto ....
A) 200 V
B) 500 V
C) 700V
D) 1000 V
Answer: D) 1000 V
Q.41) in the cables the location of fault is usually found out by comparing ...
A) the resistance of conductor
B) the inductance of conductors
C) the capacitance of insulated conductors
D) all above parameters
Answer: C) the capacitance of insulated conductors
Q.42) underground cables are laid at sufficient depth ...
A) to minimize temperature stresses
B) to avoid being underhed easily due to removal of soil
C) to minimize the effect of shocks and vibrations due to passing vehicles, etc
D) for all of the above reasons
Answer: C) to minimize the effect of shocks and vibrations due to passing vehicles, etc
Q.43) boiling water reactor and pressurized water reactors are ....
A) nuclear reactor
B) solar reactor
C) OTECH
D) biogas Reactor
Answer: A) nuclear reactor
Q.44) Lignite bituminous and anthracite are different ranks of
A) nuclear fuel
B) coal
C) natural gas
D) biogas
Answer: B) coal
Q.45) both power and manure is provided by ....
A) nuclear plants
B) thermal plants
C) biogas plants
D) hydroelectric plant
Answer: C) biogas plants
Q.46) the insulation of the cable decreases with ...
A) the increase in length of the insulation
B) the decrease in length of the insulation
C) either A or B
D) none of these
Answer: A) the increase in length of the insulation
Q.47) in the cables, sheaths are used to ...
A) prevent the moisture from entering the cable
B) provide enough strength
C) provide proper insolation
D) none of the above
Answer: A) prevent the moisture from entering the cable
Q.48) the use of strain type insulator are used ....
A) At dead ended
B) for voltage lines less than 11 kV
C) sharp curve
D) all of these
Answer: A) At dead ended
Q.49) safety factor of insulator is the ratio of ...
A) puncture strength to flash over voltage
B) flash over voltage to puncture strength
C) flash over voltage to line voltage
D) line voltage to flash over voltage
Answer: A) puncture strength to flash over voltage
Q.50) power factors can be improved by ....
A) static capacitor
B) synchronous condenser
C) phase advances
D) all of these
Answer: D) all of these
If you have any difficulties or problem in these questions paper please comment to improve the knowledge. Thanks.
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