WorksheetsPlumbing Level 2 Electrics
Total questions: 30
Worksheet time: 30mins
Name
Class
Date
1.
What is the unit of electrical resistance?
a)
Ohm
b)
Watt
c)
Ampere
d)
Volt
2.
Which material is commonly used as an electrical insulator?
a)
Copper
b)
Aluminium
c)
Rubber
d)
Steel
3.
What is the formula to calculate electrical power?
a)
P = V + I
b)
P = V x I
c)
P = V / I
d)
P = I / V
4.
What does AC stand for in electrical terms?
a)
Alternating Current
b)
Active Circuit
c)
Ampere Current
d)
Analytical Charge
5.
Which of these is a conductor of electricity?
a)
Glass
b)
Plastic
c)
Wood
d)
Copper
6.
What is the purpose of an earthing system?
a)
To reduce energy loss
b)
To prevent electric shock
c)
To increase circuit voltage
d)
To improve circuit efficiency
7.
What is the typical voltage of the mains electricity supply in the UK?
a)
120V
b)
230V
c)
400V
d)
12V
8.
What does a fuse do in an electrical circuit?
a)
Stores electrical energy
b)
Converts AC to DC
c)
Protects the circuit from overcurrent
d)
Measures the current flow
9.
Which device is used to measure electrical current?
a)
Voltmeter
b)
Ammeter
c)
Ohmmeter
d)
Multimeter
10.
What is the function of a circuit breaker?
a)
To prevent short circuits
b)
To convert electricity to heat
c)
To measure resistance
d)
To store electrical energy
11.
What is the symbol for resistance in a circuit diagram?
a)
R
b)
Ω
c)
V
d)
I
12.
What is the SI unit of electrical current?
a)
Volt
b)
Watt
c)
Ampere
d)
Ohm
13.
What type of current is supplied by a battery?
a)
Alternating Current
b)
Direct Current
c)
Pulsating Current
d)
Static Current
14.
Which law relates voltage, current, and resistance?
a)
Kirchhoff's Law
b)
Faraday's Law
c)
Ohm's Law
d)
Coulomb's Law
15.
Which of the following is NOT a type of circuit?
a)
Series
b)
Parallel
c)
Open
d)
Combined
16.
What is the colour of the live wire in a UK mains plug?
a)
Brown
b)
Blue
c)
Green and Yellow
d)
Black
17.
What is the function of a transformer?
a)
To store electrical energy
b)
To change the voltage level
c)
To measure current
d)
To convert energy to heat
18.
What is electrical power measured in?
a)
Ohms
b)
Volts
c)
Watts
d)
Amperes
19.
What is the purpose of a capacitor in a circuit?
a)
To resist current
b)
To store electrical energy
c)
To convert AC to DC
d)
To provide insulation
20.
What is the frequency of the mains electricity supply in the UK?
a)
50 Hz
b)
60 Hz
c)
40 Hz
d)
100 Hz
21.
What type of energy conversion occurs in an electric motor?
a)
Electrical to Thermal
b)
Electrical to Mechanical
c)
Thermal to Electrical
d)
Mechanical to Electrical
22.
What is the purpose of a relay in an electrical circuit?
a)
To amplify signals
b)
To switch circuits
c)
To measure voltage
d)
To store energy
23.
Which device is used to protect against earth faults?
a)
Fuse
b)
Circuit Breaker
c)
Residual Current Device (RCD)
d)
Transformer
24.
What is the purpose of a resistor in a circuit?
a)
To increase current
b)
To decrease resistance
c)
To limit current flow
d)
To store charge
25.
Which component is used to convert AC to DC?
a)
Resistor
b)
Capacitor
c)
Diode
d)
Inductor
26.
What is the purpose of a multimeter?
a)
To measure resistance only
b)
To measure voltage, current, and resistance
c)
To supply electrical power
d)
To regulate current flow
27.
What is the symbol for direct current?
a)
DC
b)
AC
c)
D
d)
I
28.
What is the colour of the neutral wire in a UK mains plug?
a)
Brown
b)
Blue
c)
Green and Yellow
d)
Black
29.
What does a rectifier do in an electrical circuit?
a)
Converts DC to AC
b)
Converts AC to DC
c)
Measures resistance
d)
Stores charge
30.
What does the term "voltage drop" refer to?
a)
A sudden increase in voltage
b)
A decrease in voltage across a component
c)
The current flowing through a resistor
d)
The total resistance in a circuit
100 %
