19 Jun 2025 Electrician 1st Sem – NSQF – Module 4 – Basic Electrical Practice MOCK TEST by admin | posted in: Uncategorized | 0 0% Question 1 of 48 1. What electrical quantities are related in Ohm's law? Current, resistance and power Current, voltage and resistance Current, voltage and resistivity Voltage, resistance and current density Loading... Question 1 of 48Question 2 of 48 2. What is the reading of the voltmeter 'V'? 6 V 9 V 0 V 18 V Loading... Question 2 of 48Question 3 of 48 3. Calculate the electrical energy in unit consumed by 500W lamp for 5 hours. 2.5 unit 1.0 unit 1.5 unit 0.5 unit Loading... Question 3 of 48Question 4 of 48 4. Which method is used for measuring 1 Ohm to 100K Ohm range resistance? Substitution method Kelvin bridge method Voltmeter and ammeter method Wheat stone bridge method Loading... Question 4 of 48Question 5 of 48 5. Which electrical quantity affects the heat generated in a conductor? Current passed through it Voltage Square of the current Square of the resistance Loading... Question 5 of 48Question 6 of 48 6. Calculate the unknown resistance "RDC" in the Wheatstone bridge circuit, if PAB=400 ohms, QBC=200 ohms and SAD=12ohms at balanced condition. 6 Ω 12 Ω 4 Ω 8 Ω Loading... Question 6 of 48Question 7 of 48 7. Which is the semiconductor material? Germanium Manganin Eureka Ebonite Loading... Question 7 of 48Question 8 of 48 8. Which is the application of series circuit? Voltmeter connection Fuse in circuit Electrical lamp in homes Shunt resistor in ammeter Loading... Question 8 of 48Question 9 of 48 9. What is the value of hot resistance of a bulb rated as 100W/250V? 625.00 ohm 62.50 ohm 31.25 ohm 312.50 ohm Loading... Question 9 of 48Question 10 of 48 10. Which one defines the change in resistance in Ohm(Ω) per degree centigrade (°C)? Temperature constant Temperature coefficient Temperature effect Laws of temperature Loading... Question 10 of 48Question 11 of 48 11. What is the formula for the equivalent resistance (RT) of the three resistors R1, R2 & R3 are connected in parallel circuit? RT = 1/(1/R1 + 1/R2 + 1/R3) RT = (R1 × R2 × R3)/(R1 + R2 + R3) RT = 1/R1 + 1/R2 + 1/R3 RT = R1 + R2 + R3 Loading... Question 11 of 48Question 12 of 48 12. What is the S.I unit of specific resistance? Ohm/metre2 Ohm-metre Micro ohm/cm2 Ohm/cm Loading... Question 12 of 48Question 13 of 48 13. Which law states that in closed electric circuit, the applied voltage is equal to the sum of the voltage drops? Kirchhoff's first law Laws of resistance Ohm's law Kirchhoff's second law Loading... Question 13 of 48Question 14 of 48 14. What is the name of the resistor? Carbon - film resistor Metal film resistor Carbon composition resistor Wire wound resistor Loading... Question 14 of 48Question 15 of 48 15. What is the name of the resistor if its resistance value increase with increase in temperature? Light Dependent Resistor (LDR) Thermistors Varistors Sensistors Loading... Question 15 of 48Question 16 of 48 16. Calculate the voltage drop across the resistor 'R4' in the circuit. 100 V 48 V 80 V 72 V Loading... Question 16 of 48Question 17 of 48 17. Which material is having negative temperature co-efficient property? Copper Eureka Mica Manganin Loading... Question 17 of 48Question 18 of 48 18. What is the voltage drop in resistor 'R2' in the series circuit? 15 Volt 5 Volt 10 Volt 20 Volt Loading... Question 18 of 48Question 19 of 48 19. What is the effect of the circuit, if 'ab' points are shorted? Same current will flow in all branches Supply voltage will exist in each branch Total circuit current is equal to each branch circuit current Circuit resistance will be zero Loading... Question 19 of 48Question 20 of 48 20. What is the value of resistance of the resistor? 330000 ± 10% Ohm 3300 ± 10% Ohm 33000 ± 5 % Ohm 330 ± 5% Ohm Loading... Question 20 of 48Question 21 of 48 21. Which resistor the lowest current flows in a parallel circuit having the values of 50W, 220W, 450W and 560W connected with supply? 50 W 220 W 560 W 450 W Loading... Question 21 of 48Question 22 of 48 22. What is the purpose of the shunt resistor 'R2' used in series type Ohm meter circuit? To limit the current in the circuit To adjust the zero position of the pointer To increase the value of meter resistance To prevent the excess current in the circuit Loading... Question 22 of 48Question 23 of 48 23. What is the effect on opened resistor in series circuit? Full circuit current will flow in opened resistor No voltage will appear across the opened resistor Total supply voltage will appear across the opened resistor No effect in opened resistor Loading... Question 23 of 48Question 24 of 48 24. Which is the application of series circuit? Multiplier resistor of a voltmeter Lighting circuits in home Shunt resistor in ammeter Voltmeter connection Loading... Question 24 of 48Question 25 of 48 25. Which formula is used to calculate the power of a DC circuit? Voltage x time Current x voltage Voltage x resistance Current x resistance Loading... Question 25 of 48Question 26 of 48 26. What is the formula for Quantity of electricity (Q)? Current x Resistance Current x Time Voltage x Resistance Voltage x Current Loading... Question 26 of 48Question 27 of 48 27. What is the unit of conductance? Ohm-m Mho Ohm/m Ohm Loading... Question 27 of 48Question 28 of 48 28. What is the value of resistance in an open circuit? Zero Low Infinity High Loading... Question 28 of 48Question 29 of 48 29. What is the change of resistance value of the conductor as its diameter is doubled? Decrease to half of the value Increases to two times Decreases to four times No change in value of resistance Loading... Question 29 of 48Question 30 of 48 30. What is the effect of the parallel circuit with one branch opened? Whole circuit will not function Current will remain same Voltage drop increase in the opened branch No current will flow in that branch Loading... Question 30 of 48Question 31 of 48 31. What is the specific resistance value of copper conductor? 1.72 Ohm/cm3 1.72 Micro ohm/m 1.72 Micro ohm 1.72 Micro ohm/cm3 Loading... Question 31 of 48Question 32 of 48 32. Calculate the value of resistance by colour coding method. 23 x 104 ± 10% 36 x 104 ± 5% 22 x 103 ± 10% 25 x 103 ± 5% Loading... Question 32 of 48Question 33 of 48 33. Which type of meter is used to test the polarity of battery? Dynamo meter type wattmeter Moving iron voltmeter Moving iron ammeter Moving coil voltmeter Loading... Question 33 of 48Question 34 of 48 34. Which type of resistor is used for Arc quenching protection in circuit breakers? Sensistors Light dependent resistor (LDR) Varistors Thermistors Loading... Question 34 of 48Question 35 of 48 35. What is the change in value of resistance of the conductor, if its cross section area is doubled? Decreases 2 times Increases 2 times No change Decreases 4 times Loading... Question 35 of 48Question 36 of 48 36. Which is inversely proportional to the resistance of a conductor? Temperature Resistivity Length Area of cross section Loading... Question 36 of 48Question 37 of 48 37. Calculate the value of unknown resistance 'RDC' in the Wheatstone bridge network, If PAB = 500W, QBC = 300W, SAD = 15W,at balanced condition. 12W 3W 6W 9W Loading... Question 37 of 48Question 38 of 48 38. Why the ohmmeter is graduated with non-linear scale? Voltage is directly proportional to resistance Voltage is directly proportional to the square of the current Current is inversely proportional to resistance Resistance is inversely proportional to the square of current Loading... Question 38 of 48Question 39 of 48 39. Calculate the value of resistance 'R2' in the parallel circuit. 8 Ω 2 Ω 4 Ω 6 Ω Loading... Question 39 of 48Question 40 of 48 40. How many electrons are there in the third cell of the copper atom? 13 18 29 8 Loading... Question 40 of 48Question 41 of 48 41. Calculate the hot resistance of 200W / 250V rated lamp. 312.5 W 31.25 W 62.5 W 625 W Loading... Question 41 of 48Question 42 of 48 42. Calculate the total power of the circuit of two lamps rated as 200W/240V are connected in series across 240V supply? 400 W 100 W 200 W 50 W Loading... Question 42 of 48Question 43 of 48 43. What is the reading of ohmmeter across opened 'R2' resistor? Indicate zero reading Total resistance value of the circuit Value of sum of the resistance of R1 and R3 only Indicate infinite resistance Loading... Question 43 of 48Question 44 of 48 44. What is the unit of resistivity? ohm / cm ohm / cm2 ohm / metre ohm - metre Loading... Question 44 of 48Question 45 of 48 45. What is the indication of neon polarity indicator used for checking A.C. supply? Only one electrode will glow Both electrodes will glow One electrode will glow and another will be flickering Both electrodes will be flickering Loading... Question 45 of 48Question 46 of 48 46. What is the resistance of Light Dependent Resistor (LDR), if the intensity of light is increased? Becomes infinity Increases Remains same Decreases Loading... Question 46 of 48Question 47 of 48 47. Calculate the resistance value of the resistor by colour coding method. 32 x 104 W ± 10% 26 x 103 W ± 10% 23 x 103 W ± 5% 37 x 104 W ± 5% Loading... Question 47 of 48Question 48 of 48 48. Calculate the resistance value in R3 resistor. 12 Ohm 4 Ohm 8 Ohm 6 Ohm Loading... Question 48 of 48 Loading...
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