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Electricity
Test Description: Practical Electricity Test
Instructions: Answer all questions to get your test result.
1) Which is a possible material for the heating element i the electric iron?
A
steel
B
silver
C
nichrome
D
copper
2) Which is the current flowing through an appliance marked 240V, 40W?
A
6.00A
B
3.00A
C
0.17A
D
6.67A
3) Which is the power produces by an appliance marked 240V, 2A ?
A
8.3 mW
B
480 W
C
120 W
D
60 W
4) Which is the effective resistance of an appliance marked 240V, 60 W?
A
14400 ohm
B
4 ohm
C
0.25 ohm
D
960 ohm
5) How much energy does a spot light rated at 2kW consumed in 6h?
A
12 kWh
B
3 kWh
C
8 kWh
D
4 kWh
6) If a heater draws 5 A current from a 240 V supply, what is the current in the live wire?
A
0 A
B
10 A
C
240 A
D
5 A
7) Which is the most appropriate fuse rating for a 240 V, 1.2 kW heater?
A
5 A
B
10 A
C
3 A
D
13 A
8) Many hair dryers have no earth wire. Why?
A
The current is too small.
B
The casing is made of plastic material.
C
The plug is installed with fuse.
D
The fan prevent heating of the coil.
9) What is 1 kWh
A
1000 W of power
B
$1 worth of energy
C
3600000 J of energy
D
1000 J of energy
10) What is the reason for the fuse and switch to be located at the live wire?
A
To indicate the user that the wire is Live wire.
B
To cut off the current from the appliance.
C
To cut off the voltage from the appliance.
D
To break the circuit when there is a sudden current surge.
*select an answer for all questions
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