Electrician 1st Sem – NSQF – Module 4 – Basic Electrical Practice MOCK TEST

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Question 1 of 48

Why the ohmmeter is graduated with non-linear scale?\

Voltage is directly proportional to the square of the current

Resistance is inversely proportional to the square of current

Voltage is directly proportional to resistance

Current is inversely proportional to resistance

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Question 1 of 48

Question 2 of 48

What is the formula for Quantity of electricity (Q)?

Current x Resistance

Voltage x Current

Voltage x Resistance

Current x Time

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Question 2 of 48

Question 3 of 48

How many electrons are there in the third cell of the copper atom?

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Question 3 of 48

Question 4 of 48

Calculate the value of resistance by colour coding method.

36 x 10⁴ ± 5%

23 x 10⁴ ± 10%

22 x 10³ ± 10%

25 x 10³ ± 5%

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Question 4 of 48

Question 5 of 48

What is the value of resistance in an open circuit?

High

Low

Infinity

Zero

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Question 5 of 48

Question 6 of 48

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Question 6 of 48

Question 7 of 48

Calculate the resistance value in R₃ resistor.

12 Ohm

6 Ohm

4 Ohm

8 Ohm

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Question 7 of 48

Question 8 of 48

What electrical quantities are related in Ohm's law?

Voltage, resistance and current density

Current, voltage and resistance

Current, voltage and resistivity

Current, resistance and power

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Question 8 of 48

Question 9 of 48

What is the S.I unit of specific resistance?

Ohm-metre

Micro ohm/cm²

Ohm/cm

Ohm/metre²

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Question 9 of 48

Question 10 of 48

10.

Which is the application of series circuit?

Multiplier resistor of a voltmeter

Lighting circuits in home

Shunt resistor in ammeter

Voltmeter connection

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Question 10 of 48

Question 11 of 48

11.

Calculate the hot resistance of 200W / 250V rated lamp.

312.5 Ω

31.25 Ω

62.5 Ω

625 Ω

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Question 11 of 48

Question 12 of 48

12.

Which type of meter is used to test the polarity of battery?

Dynamo meter type wattmeter

Moving iron ammeter

Moving iron voltmeter

Moving coil voltmeter

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Question 12 of 48

Question 13 of 48

13.

What is the change of resistance value of the conductor as its diameter is doubled?

Increases to two times

No change in value of resistance

Decreases to four times

Decrease to half of the value

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Question 13 of 48

Question 14 of 48

14.

What is the purpose of the shunt resistor 'R₂ ' used in series type Ohm meter circuit?

To adjust the zero position of the pointer

To increase the value of meter resistance

To limit the current in the circuit

To prevent the excess current in the circuit

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Question 14 of 48

Question 15 of 48

15.

Calculate the total power of the circuit of two lamps rated as 200W/240V are connected in series across 240V supply?

50 W

200 W

400 W

100 W

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Question 15 of 48

Question 16 of 48

16.

What is the effect of the parallel circuit with one branch opened?

Whole circuit will not function

Voltage drop increase in the opened branch

Current will remain same

No current will flow in that branch

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Question 16 of 48

Question 17 of 48

17.

What is the indication of neon polarity indicator used for checking A.C. supply?

One electrode will glow and another will be flickering

Only one electrode will glow

Both electrodes will be flickering

Both electrodes will glow

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Question 17 of 48

Question 18 of 48

18.

What is the unit of resistivity?

ohm / cm

ohm / metre

ohm - metre

ohm / cm²

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Question 18 of 48

Question 19 of 48

19.

What is the value of resistance of the resistor?

33000 ± 5 % Ohm

330 ± 5% Ohm

330000 ± 10% Ohm

3300 ± 10% Ohm

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Question 19 of 48

Question 20 of 48

20.

What is the specific resistance value of copper conductor?

1.72 Micro ohm/cm³

1.72 Micro ohm

1.72 Micro ohm/m

1.72 Ohm/cm³

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Question 20 of 48

Question 21 of 48

21.

Which formula is used to calculate the power of a DC circuit?

Voltage x resistance

Current x voltage

Current x resistance

Voltage x time

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Question 21 of 48

Question 22 of 48

22.

What is the reading of the voltmeter 'V'?

9 V

6 V

18 V

0 V

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Question 22 of 48

Question 23 of 48

23.

Calculate the voltage drop across the resistor 'R₄' in the circuit.

48 V

100 V

72 V

80 V

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Question 23 of 48

Question 24 of 48

24.

What is the voltage drop in resistor 'R₂' in the series circuit?

20 Volt

5 Volt

15 Volt

10 Volt

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Question 24 of 48

Question 25 of 48

25.

Which electrical quantity affects the heat generated in a conductor?

Square of the resistance

Voltage

Current passed through it

Square of the current

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Question 25 of 48

Question 26 of 48

26.

What is the reading of ohmmeter across opened 'R2' resistor?

Value of sum of the resistance of R1 and R3 only

Indicate infinite resistance

Total resistance value of the circuit

Indicate zero reading

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Question 26 of 48

Question 27 of 48

27.

What is the resistance of Light Dependent Resistor (LDR), if the intensity of light is increased?

Becomes infinity

Increases

Decreases

Remains same

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Question 27 of 48

Question 28 of 48

28.

What is the change in value of resistance of the conductor, if its cross section area is doubled?

Decreases 2 times

Decreases 4 times

Increases 2 times

No change

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Question 28 of 48

Question 29 of 48

29.

Which one defines the change in resistance in Ohm(Ω) per degree centigrade (°C)?

Laws of temperature

Temperature effect

Temperature constant

Temperature coefficient

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Question 29 of 48

Question 30 of 48

30.

Which is the application of series circuit?

Electrical lamp in homes

Fuse in circuit

Shunt resistor in ammeter

Voltmeter connection

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Question 30 of 48

Question 31 of 48

31.

Which material is having negative temperature co-efficient property?

Mica

Copper

Manganin

Eureka

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Question 31 of 48

Question 32 of 48

32.

What is the name of the resistor if its resistance value increase with increase in temperature?

Varistors

Sensistors

Thermistors

Light Dependent Resistor (LDR)

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Question 32 of 48

Question 33 of 48

33.

Which is inversely proportional to the resistance of a conductor?

Length

Area of cross section

Resistivity

Temperature

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Question 33 of 48

Question 34 of 48

34.

Calculate the value of unknown resistance 'R_DC ' in the Wheatstone bridge network, If P_AB = 500Ω, Q_BC = 300Ω, S_AD = 15Ω,at balanced condition.

9Ω

6Ω

3Ω

12Ω

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Question 34 of 48

Question 35 of 48

35.

Which resistor the lowest current flows in a parallel circuit having the values of 50Ω, 220Ω, 450Ω and 560Ω connected with supply?

450 Ω

560 Ω

50 Ω

220 Ω

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Question 35 of 48

Question 36 of 48

36.

Calculate the resistance value of the resistor by colour coding method.

37 x 10⁴ Ω ± 10%

23 x 10³ Ω ± 5%

32 x 10⁴ Ω ± 10%

26 x 10³ Ω ± 10%

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Question 36 of 48

Question 37 of 48

37.

Calculate the value of resistance 'R₂' in the parallel circuit.

4 Ω

6 Ω

2 Ω

8 Ω

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Question 37 of 48

Question 38 of 48

38.

Which method is used for measuring 1 Ohm to 100K Ohm range resistance?

Wheat stone bridge method

Substitution method

Kelvin bridge method

Voltmeter and ammeter method

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Question 38 of 48

Question 39 of 48

39.

What is the effect of the circuit, if 'ab' points are shorted?

Circuit resistance will be zero

Total circuit current is equal to each branch circuit current

Same current will flow in all branches

Supply voltage will exist in each branch

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Question 39 of 48

Question 40 of 48

40.

Which type of resistor is used for Arc quenching protection in circuit breakers?

Light dependent resistor (LDR)

Thermistors

Sensistors

Varistors

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Question 40 of 48

Question 41 of 48

41.

Which law states that in closed electric circuit, the applied voltage is equal to the sum of the voltage drops?

Ohm's law

Kirchhoff's second law

Laws of resistance

Kirchhoff's first law

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Question 41 of 48

Question 42 of 48

42.

Which is the semiconductor material?

Manganin

Eureka

Germanium

Ebonite

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Question 42 of 48

Question 43 of 48

43.

What is the unit of conductance?

Ohm/m

Ohm

Ohm-m

Mho

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Question 43 of 48

Question 44 of 48

44.

What is the name of the resistor?

Carbon composition resistor

Wire wound resistor

Metal film resistor

Carbon - film resistor

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Question 44 of 48

Question 45 of 48

45.

Calculate the unknown resistance "R_DC" in the Wheatstone bridge circuit, if P_AB=400 ohms, Q_BC=200 ohms and S_AD=12ohms at balanced condition.

4 Ω

6 Ω

12 Ω

8 Ω

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Question 45 of 48

Question 46 of 48

46.

What is the value of hot resistance of a bulb rated as 100W/250V?

625.00 ohm

31.25 ohm

312.50 ohm

62.50 ohm

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Question 46 of 48

Question 47 of 48

47.

What is the effect on opened resistor in series circuit?

No effect in opened resistor

No voltage will appear across the opened resistor

Full circuit current will flow in opened resistor

Total supply voltage will appear across the opened resistor

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Question 47 of 48

Question 48 of 48

48.

Calculate the electrical energy in unit consumed by 500W lamp for 5 hours.

1.5 unit

1.0 unit

2.5 unit

0.5 unit

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Question 48 of 48