Showing posts with label Basic Electrician MCQ (English). Show all posts
Showing posts with label Basic Electrician MCQ (English). Show all posts

May 1, 2020

Basic Electrician Theory MCQ In English ||10||

Friday, May 01, 2020
1. When we install a 2000 watt heater in the wire of the house, then the heater turns red when the wiring wires stay cool because?
(A) Heater element has more current than wiring
(B) Element wire is naked so can feel its heat
(C) Element registration is less than warping
(D) Element registration is higher than wiring
Answer- (D)

2. When we install a 1500 watt heater in the wiring of the house, the light of the bulb decreases because?
(A) More current is taken by the heater and less current is left for the bulb to burn.
(B) A high voltage is dropped parallel to the heater and the bulb receives a low voltage
(C) There is a high voltage drop in the line and the lamp and heater get low voltage.
(D) Due to over-voltage drop in the line, the bulb receives low voltage but no effect on the heater
Answer - (C)

3. Which effect is produced when electric current flows in the circuit?
(A) thermal effect occurs
(B) is the optical effect
(C) chemical effect
(D) All of the above are effects
Answer- (D)

4. What supplies are needed for transistor radios?
(A) low voltage DC
(B) low voltage AC
(C) High voltage AC
(D) High voltage DC
Answer- (A)

5. If 20 resistances of 20 ohms are connected in parallel, then what will be its combined resistance?
(A) 1
(B) 2
(C) 10
(D) 100
Answer- (A)

6. Which lamp has higher resistance?
(A) 200 watts, 250 volts
(B) 100 watts, 250 volts
(C) 60 watts, 250 volts
(D) 40 watts, 250 volts
Answer- (D)
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Apr 30, 2020

Basic Electrician Theory MCQ In English ||09||

Thursday, April 30, 2020 0

1. When current flows through the heater coil it glows but the supply wiring does not glow because
(A) Current flows slowly through the supply line
(B) Supply wires are covered with insulation layer
(C) The resistance of the heater wire is greater than the supply wires
(D) Supply wires are made of superior material
Answer: (C)

2. The condition for validity under Ohm's law is that
(A) resistance should be uniform
(B) should be proportional to the size of current resistance
(C) Resistance should be wire wound type
(D) Temperature at positive end should be higher than temperature at negative end
Answer: (A)

3. A rheostat differs from a potentiometer in that it
(A) wattage is low
(B) has high wattage rating
(C) There are a large number of rotations
(D) provides a large number of tapping
Ans: (B)

4. Aluminum conductors weigh more than copper conductors of the same cross-section for the same electrical resistance
(A) 50%
(B) 60%
(C) 100%
(D) 150%
Answer: (A)

5. An open resistor is tested with an ohm-meter. What will be the reading of the ohm-meter?
(A) zero
(B) infinite
(C) high but within tolerance
(D) low but not zero
Ans: (B)

6. They are materials that are much lower in electrical conductivity than most metals, but much higher than typical insulators.
(A) Varistors
(B) thermistor
(C) semiconductor
(D) variable resistor
Answer: (C)
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Apr 29, 2020

Basic Electrician Theory MCQ In English ||08||

Wednesday, April 29, 2020 0


1. Bulbs in street lighting are connected to all
(A) parallel
(B) series
(C) Series-parallel
(D) End-to-end
Answer: (A)

2. Test lamp must have wattage for testing appliances
(A) is very low
(B) less
(C) high
(D) any value
Answer: (C)

3. Switching a lamp in a house produces noise in the radio. This is because switching produces operation
(A) arcs to separate contacts
(B) High intensity mechanical noise
(C) arcs between both mechanical noise and contacts
(D) None of the above
Answer: (A)

4. When a load is switched off in a circuit, sparking occurs due to whose value is higher in the circuit.
(A) resistance
(B) induction
(C) Capacity
(D) impedance
Ans: (B)

5. A copper wire of fixed length and resistance is stretched and stretched three times its length without changing its volume, how much will the resistance of the wire change
(A) 1/9 times
(B) 3 times
(C) 9 times
(D) unchanged
Answer: (C)

6. When the resistance element of a heater fuses and then we reconnect it after removing a part of it, what will be the power expenditure of the heater
(A) deficiency
(B) growth
(C) remain constant
(D) None of the above
Ans: (B)
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Apr 25, 2020

Basic Electrician Theory MCQ In English ||07||

Saturday, April 25, 2020 0

1. Why a glass rod gets charged when rubbed with silk cloth
(A) It takes in protons
(B) its atoms are removed
(C) It removes electrons
(D) It gives positive charge
Answer: (C)

2. 122. The magnitude of current in AC and DC circuits can be reduced by
(A) reactor
(B) capacitor
(C) inductor
(D) register
Ans: (D)

3. It becomes more difficult to remove
(A) An electron from the orbit
(B) First electron from orbit
(C) Second electron from orbit
(D) Third electron from orbit
Ans: (D)

4. When a branch of a parallel circuit is opened, what will be the effect on the current?
(A) will decrease
(B) Increase
(C) decrease
(D) becomes zero
Answer: (C)

5. When more than one lamp is turned on in a lamp load, what will be the effect on the total resistance
(A) increases
(B) decreases
(C) remains the same
(D) None of the above
Ans: (B)

6. 230v AC of two lamps 100w and 40w. If connected with supply in series
Which of the following statements is correct?
(A) 100 watt lamp will glow more
(B) 40 watt lamp will glow more
(C) Both lamps will shine equally
(D) 40 W lamp will fuse
Ans: (B)
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Apr 22, 2020

Basic Electrician Theory MCQ In English ||06||

Wednesday, April 22, 2020 0
1. Ohm's Law does not apply
(A) Vacuum tube
(B) carbon resistors
(C) High voltage circuit
(D) none of these
Answer: (A)

2. Who is the best conductor of electricity?
(A) Iron
(B) Silver
(C) copper
(D) Carbon
Ans: (B)

3. For which of the following can the ampere second unit be?
(A) Reluctance
(B) Charge
(C) Power
(D) Energy
Ans: (B)

4. All of which are equivalent to watts except for the following
(A) (ampere) ohm
(B) Joules / sec
(C) ampere x volt
(D) ampere / volt
Ans: (D)

5. 10 ohms, the resistance with a rating of 10 w will be
(A) metallic resistor
(B) carbon resistor
(C) wire wound resistor
(D) variable resistor
Answer: (C)
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Apr 21, 2020

Basic Electrician Theory MCQ In English ||05||

Tuesday, April 21, 2020 0
1. S.I unit of power is
(A) Henry
(B) Coulomb
(C) watt
(D) watt-hour
Answer: (C)

2. Electric pressure is also called
(A) resistance
(B) power
(C) voltage
(D) energy
Answer: (C)

3. Substances that have a large number of free electrons and a low resistance
(A) Insulator
(B) inductor
(C) semiconductor
(D) conductor
Ans: (D)

4. Which one of the following is not a poor conductor?
(A) cast iron
(B) copper
(C) carbon
(D) tungsten
Ans: (B)

5. Which of the following is an insulating material?
(A) copper
(B) gold
(C) Silver
(D) paper
Ans: (D)

6. The properties of a conductor due to which current flows out of it are called
(A) resistance
(B) reluctance
(C) conductance
(D) inductance
Answer: (C)
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Apr 19, 2020

Basic Electrician Theory MCQ In English ||04||

Sunday, April 19, 2020 0


1. The value of one magma ohm is equal to?
(A) 106 ohms
(B) 103 ohms
(C) 109 ohms
(D) 1012 ohms
Answer - (A)

2. Resistance is measured?
(A) Ampere
(B) Ohm
(C) volts
(D) watts
Answer - (B)

3. Which instrument is used to measure current?
(A) voltmeter
(B) Ammeter
(C) wattmeter
(D) thermometer
Answer - (B)

4. What is his full name of S.W.G. ?
(A) Standard wire gauge
(B) Swiss wire gauge
(C) Swiss western gauge
(D) Standard wire gas
Answer - (A)

5. SI unit of voltage ?
(A) Volts
(B) Ohm
(C) Ampere
(D) Watts
Answer - (A)
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Apr 18, 2020

Basic Electrician Theory MCQ In English ||03||

Saturday, April 18, 2020 0

1. Atomic number of silicon is equal to
(A) 6
(B) 14
(C) 18
(D) 44
Answer- (B)

2. Who Is the responsible for the current flowing in a conductor wire?
(A) difference in temperature
(B) Difference in voltage
(C) difference in resistance
(D) All this
Answer- (B)

3. The smallest particle that has all the properties of that element ………. Is called
(A) Atom
(B) Proton
(C) Element
(D) Molecules
Answer- (D)

4. Who discovered the magnetic effect of electric current?
(A) Faraday
(B) Arsted
(C) Joule
(D) Coulomb
Answer- (B)

5. What is the unit of electric energy?
(A) Watts
(B) Kilowatt hour
(C) KW
(D) Joule
Answer- (B)
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Apr 17, 2020

Basic Electrician Theory MCQ In English ||02||

Friday, April 17, 2020 0


1. The unit of resistance is
(A) Ohm
(B) Ohm meter
(C) Mho
(D) Simen
Answer - (A) Ohm

2. What is speed of electric current
(A) 3X109 m/min
(B) 3X108 m/s
(C) 3X1018 m/s
(D) 3X107 m/s
Answer - (B) 3X108 m/s

3. That property of materials which provides ease of electric current flow is called?
(A) Conductivity
(B) Resistivity
(C) Conductivity
(D)Voltage difference
Answer - (A) Conductivity

4. The resistivity of a wire depends ?
(A) on the nature of matter
(B) at length
(C) cross section area of conductor
(D) None of these
Answer - (A) on the nature of matter
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Basic Electrician Theory MCQ In English ||01||

Friday, April 17, 2020 0

1. Who first discovered the electricity
(A) Dalton
(B) Einstein
(C) Newton
(D) Thales
Answer- (D) Thales

2. Energy can neither be generated nor destroyed, is related
(A) Newton's Second Law
(B) Einstein's Law of Energy
(C) Electric energy law
(D) Law of energy conservation
Answer- (D) Law of energy conservation

3. Cause of accident
(A) No danger awareness
(B) Careless about safety
(C) No serious about work
(D) All of the above
Answer- (D) All of the above

4. Generally above which volt is the electric shock -
(A) 10 volt
(B) 30 volts
(C) 90 volts
(D) 230 volt
Answer- (C) 90 volts

5. The value of the man supply voltage in the coaches of ships, aircraft and trains is
(A) 110V
(B) 230V
(C) 400V
(D) 650V
Answer- (A) 110V

6. Fire should be extinguished with in the current flow electric line
(A) With water
(B) CTC
(C) Petrol
(D) Diesel
Answer- (B) CTC

7. Earth Wire should be connected -
(A) In a man line
(B) From the body of the device
(C) With phase
(D) All of the above
Answer- (B) From the body of the device

8. Man switch should be made ………………… before replacing the fuse wire.
(A) Closed
(B) On
(C) No change
(D) Any of the above
Answer- (A) Closed

9. Phase wire should be connected in the circuit
(A) With a switch
(B) With Earth
(C) With Device
(D) None of the
Answer- (A) With a switch

10. The value of safety coefficient is kept
(A) Minimum
(B) Maximum
(C) Equal to power coefficient
(D) 1
Answer- (B) Maximum
11. These signs of circle shape are made by red border and black bars on the cross bar and white back ground.
(A) Prohibitive sign
(B) Mandatory sign
(C) Warning sign
(D) Informational Sign
Answer- (A) Prohibitive sign

12. Category  B fire Substances suitable for extinguishing
(A) With water
(B) With sand
(C) Dry powder
(D) With CO2
Answer- (C) Dry powder

13. Diesel petrol fires fall under which category
(A) Category -A
(B) Category-B
(C) Category-C
(D) Category -D
Answer- (B) Category-B

14.  Full name of ISI
(A) Indian Standard Institute
(B) International Standard Institute
(C) Inter Service Intelligence
(D) International System Institute
Answer- (A) Indian Standard Institute

15. Based on ISIs standards which year ------- started work in India
(A) 1979
(B) 1969
(C) 1959
(D) 1990
Answer-(B) 1969

16. To wean off a person in contact with electricity -
(A) Main switch should be turned off
(B) Conductor Should be cut with a knife
(C) The victim should be pushed off the line
(D) Any one of the above methods
Answer- (A) Main switch should be turned off

17. To protect from electrical shock ........... the wire should always be controlled by switch
(A) Neutral
(B) Earth
(C) Phase
(D) Fuse
Answer- (C) Phase

18. When separating a main lead from a socket, it should be held and pulled .................
(A) Lead
(B) Cable
(C) Plug-Top
(D) None of the above
Answer- (C) Plug-Top

19. ISO abbreviation of-
(A) Indian standard order
(B) International Standards Organization
(C) International System Order
(D) Indian System Order
Answer-(B) International Standard Order

20. Electrician should use safety belt while working at the recommended height of 9001 rule
(A) 3 M
(B) 2-5 M
(C) 1-8 M
(D) 0-5 M
Answer- (C) 1-8 M
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Electrician Theory MCQ In English ||Part-02||
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