GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
3. Do not refresh or back page.
4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
The commonly used safety fuse wire is made of ___________________
Copper
Lead
Nickel
An alloy of tin and lead
2
Marie conducted an experiment to find out if the number of bulbs arranged in series would affect the brightness of the bulbs. which of the following variables should be kept the same?
A. Type of bulbs
B. number of wires
C. Types of batteries
D. number of bulbs
D only
B and D only
A,B and C only
A,B,C and D
3
Gloves used for electrical protection must be electrically tested every __________
3 month
6 month
12 month
Never
4
A Voltmeter is a device used to measure ______________________.
Voltage
Current
Resistance
None of the above
5
In parallel combination of resistance the total current flowing through the circuit is equal to _____________________________.
Current passing through single resistance
Sum of current passing through all the resistances
Current cannot be calculated
6
Three batteries are connected as shown in the figure. If each cell has an e.m.f. of 3 V. The the total emf in the circuit is ________V.
7
14
A fuse : __________________________
Is a safety device
Prevents damages to electrical circuits
Prevents possible fire
All of these
8
We should not touch switches with wet hands because ____________________
Water is a good conductor of electricity and it will result in electric shock
Water is a bad conductor of electricity and will result in electric shock
By touching electric appliances we can break the circuit
We can touch electric appliances with wet hands
9
When a fuse is rated 8A, it means __________________
It will not work if current is less than 8A
It has a resistance of 8 ohm
It will work only if current is 8A
It will burn if current exceeds 8A
10
State true or false using codes given below.
I. A fuse is used to complete or break an electric circuit.
II. Current in a cell flows from positive terminal to negative terminal.
III. A circuit is said to be open if current flows through it.
IV. A filament is a part of bulb which glows when current pass through it.
I-T, II-T, III-F, IV-T
I-F, II-T, III-T, IV-F
I-F, II-F, III-F, IV-T
I-F, II-T, III-F, IV-T
11
A fuse wire is always connected to the ___________________
Earth wire
Neutral wire
Live wire
None of these
12
An alloy of Lead(Pb) and Tin(Sn) is used in electric fuse because it has
High Boiling Point
High Melting Point
Low Melting Point
Low Boiling Point
13
Circuit breaker device which can be used in place of fuse in domestic electric wiring is called
DCB
MCD
MCB
BCM
Sensitivity of a voltmeter is given by the ________________________ .
Ohms per volt
Reciprocal of full scale deflection current
.Both (A) and (B)
15
The fault clearing time of a circuit breaker is usually
few minutes
few seconds
one second
few cycles of supply voltage