Electrical Qustions ans answers

1. QUESTION PAPER
1. Generator is a machine which converts mechanical energy into............
(a) Light Energy (b) Electrical Energy
(c) wind Energy (d) all above
2. What is method of voltmeter connection to measure the voltage in the circuit?
(a) sereis or parallel connection (b) series connection
(c) parallel connection (d) None of the above
3. What is method of ammeter connection to measure the current in the circuit ?
(a) series connection (b) parallel connection
(c) sereis or parallel connection (d) None of the above
4. An electric soldering iron with a 80 ohms heating element is plugged into a 240V outlet. How much current will be drawn by the iron ?
(a) 2A (b) 3A
(c) 4A (d) 5A
5. When three resistors R1= 100 ohm , R2=200 ohm , R3= 200 ohm connected in series than the value of Total resistance of the circuit ?
(a) 600 ohm (b) 300 ohm
(c) 500 ohm (d) 33.3 ohm
6. In our country , the voltage used for Domestic lighting is .?
(a) 220 V (b) 440V
(c) 230V (d) 110V
7. Motor is a machine which converts Electrical energy into ...........
(a) solar energy (b) wind energy
(c) heat energy (d) Mechanical energy
8. If any unknown resistors has following colour bands, than the value of resistor will be ? 1. Brown 2. Black 3. Black 4. Black 5. Brown
(a) 100 ohm (b) 200 ohm
Question Set Name
KK_EM01_13
Exam Duration
00:30:00
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2. (c) 10K ohm (d) 220 ohm
9. What is the colour of neutral in a single phase or 3 phase circuit ?
(a) Blue (b) Red
(c) Yellow (d) Black
10. What is phase Voltage of 3 phase power supply.?
(a) 110V (b) 440V
(c) 230V (d) 399V
11. In the purely resistive circuit the voltage and current will be ?
(a) Volatage leading current (b) current leading volatage
(c) In phase with each other (d) None
12. A transformer transfer the voltage from primary winding to secondary winding without changing........
(a) Power (b) Volatage
(c) Frequency (d) Time period
13. The primary and secondary winding of a transformer are .......................coupled .
(a) Electrically (b) Magnetically
(c) Both Electrically and magnetically (d) none
14. Which is the best conductor of electricity ?
(a) copper (b) aluminium
(c) Silver (d) Gold
15. Which type of instrument is used to measure value of current ?
(a) Ohmeter (b) wattmeter
(c) Meggar (d) Clamp-meter
16. When three resistors R1=100 ohm, R2=100 ohm and R3=100 ohm connected in parallel than the value of total resistance of circuit is ?
(a) 40.33 ohm (b) 33.33 ohm
(c) 300 ohm (d) 23.33 ohm
17. Expand MCB:
(a) Miniature circuit breaker (b) Moulded case breaker
(c) melting circuit breaker (d) non
18. Transformers are rated in......
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3. (a) KW (b) HP
(c) KVA (d) KWH
19. 1 HP Metric = ...........watts
(a) 746 watts (b) 1000 watts
(c) 735.5 watts (d) 500 watts
20. 1 HP British = .............watts
(a) 735.5 (b) 746 watts
(c) 1000 watts (d) non
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