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Single Phase Electrical Installation

Total questions: 56

Worksheet time: 28mins

Name
Class
Date
1.

Which of the following equipment is not found in the distribution fuse board?

a)

Main switch

b)

Neutral link

c)

Miniature circuit breaker (MCB)

d)

Residual current circuit breaker (RCCB)

2.

What is the function of the Kilo Watt Hour Meter?

a)

Measure current used

b)

Measure voltage used

c)

Measure resistance used

d)

Measure total energy used

3.

What type of testing is shown in Figure Q3?

a)

Continuity test

b)

Insulation test

c)

Polarity test

d)

Earthing test

4.

What is the function of a measuring tape?

a)

Cutting cables

b)

Making measurements

c)

Making connections

d)

Winding conductors

5.

Earth leakage current can be protected using?

a)

RCCB

b)

Pull switch

c)

Two-way switch

d)

Leakage stopper

6.

What is the supply voltage for single-phase residential homes in Malaysia?

a)

240 V

b)

415 V

c)

500 V

d)

150 V

7.

What is the minimum cable size and fuse rating for a ring circuit?

a)

1.5mm² pvc/pvc - 6 Amp

b)

2.5 mm² pvc/pvc - 15 Amp

c)

2.5 mm² pvc/pvc - 32 Amp

d)

1.25 mm² pvc/pvc - 32 Amp

8.

Which of the following is not a type of cable?

a)

PVC

b)

MICC

c)

XLPE

d)

ACC

9.

The testing tool 'Ohm meter' is used to measure?

a)

Current

b)

Voltage

c)

Power

d)

Resistance

10.

How many terminals does an intermediate switch have?

a)

1 terminal

b)

2 terminals

c)

3 terminals

d)

4 terminals

11.

Which quantity cannot be measured by a multimeter?

a)

Current

b)

Voltage

c)

Power

d)

Resistance

12.

What is the function of the 'lead strip cutter' tool?

a)

Cutting cables

b)

Shaping solder

c)

Twisting cable conductors

d)

Tightening screws on switch terminals

13.

What is the MCB size used for 2 socket outlets in a radial circuit?

a)

6 A

b)

16 A

c)

20 A

d)

32 A

14.

The statement 'This type of trunking requires the earth conductor connection to be terminated on its body' can be associated with?

a)

PVC casing

b)

PVC trunking

c)

Mini trunking for office installations

d)

Trunking coated with zinc

15.

'Stock and dies' are used to make threads on?

a)

PVC pipe

b)

PVC conduit

c)

Metal conduit

d)

Flexible conduit

16.

According to IEE regulations, the allowed space factor for trunking is?

a)

45%

b)

40%

c)

60%

d)

55%

17.

Choose the correct statement for the installation of SSO circuit 15 A.

a)

Number Rate MCB

b)

2 20A

c)

1 20A

d)

1 32A

e)

1 6A

18.

How many terminals does an RCCB have?

a)

2

b)

3

c)

1

d)

4

19.

Why are circuit breakers placed on each circuit with different current ratings?

a)

To protect the load used.

b)

To protect the circuit when leakage current occurs.

c)

To protect the circuit breaker from damage.

d)

To protect the circuit when excess current occurs.

20.

What conditions can cause the MCB to trip?

a)

Earth leakage cable

b)

Earth and phase cable connected

c)

Earth and neutral cable connected

d)

Phase and neutral cable connected

21.

What is the space factor for conduit to make single phase wiring?

a)

25%

b)

30%

c)

35%

d)

40%

22.

What are the advantages of concealed wiring?

a)

Neat and beautiful

b)

Longer cable durability

c)

Reduced mechanical damage

d)

Easy to maintain when cable damage occurs

23.

What is the color code for electrical wiring?

a)

Blue

b)

Orange

c)

Red

d)

Gray

24.

The standard notice displaying the word __________ must be placed in a visible location near the switchboard.

a)

WARNING

b)

DANGER

c)

NO ENTRY

d)

WORKING PERSONNEL

25.

What does the 'OFFSET' bend on conduit mean?

a)

Single 90° angle bend

b)

Single 135° angle bend

c)

Double 90° angle bend

d)

Double 135° angle bend

26.

What tool is used to bend PVC conduit?

a)

Table vice

b)

Bending machine

c)

Wood bending block

d)

Bending spring

27.

What is the name of the tool mentioned above?

a)

Elbow

b)

Long Bend

c)

2 Way Box

d)

Inspection Tee

28.

What is the nominal voltage for single phase and its range?

a)

230V +10% -6%

b)

230V +10% -5%

c)

230V +6% -10%

d)

230V +5% -10%

29.

The statement refers to?

a)

Space factor

b)

Economic factor

c)

Various factors

d)

Reduction factor

30.

Why must PVC/PVC cables be used for concealed wiring?

a)

To look neater

b)

According to the homeowner's request

c)

Surroundings and mechanical damage

d)

PVC/PVC cables are cheap and readily available

31.

What is the color code for trunking in electrical wiring?

a)

Blue

b)

Orange

c)

White

d)

Red

32.

What is the cable size for lighting circuit wiring in trunking?

a)

1.5 mm² PVC

b)

2.5 mm² PVC

c)

3.0 mm² PVC

d)

4.0 mm² PVC

33.

What is the cable size and MCB rating for S.A.K 13Amp for trunking circuit wiring?

a)

2.5 mm² PVC - 6 Amp

b)

2.5 mm² PVC - 10 Amp

c)

2.5 mm² PVC - 32 Amp

d)

2.5 mm² PVC - 30 Amp

34.

What is the minimum cable size for trunking wiring for S.A.K 15 Amp?

a)

6.0 mm² PVC

b)

4.0 mm² PVC

c)

4.0 mm² PVC/PVC

d)

1.25 mm² PVC/PVC

35.

What are the advantages of trunking wiring system?

a)

High cost

b)

Easy to maintain

c)

Does not require skilled workers

d)

Can accommodate many cables

36.

What is the space factor for trunking?

a)

30%

b)

35%

c)

40%

d)

45%

37.

What tool is used to cut trunking?

a)

Trunking cutter

b)

Trunking spring

c)

Trunking bander

d)

Trunking saw

38.

The following are tools commonly used in trunking work EXCEPT

a)

Saw

b)

L-shaped square

c)

Saddle & bar

d)

Trunking scissors

39.

What are the disadvantages of trunking wiring system?

a)

High cost

b)

Durable

c)

Not neat/beautiful

d)

Requires skilled workers

40.

The common size of trunking used for single phase wiring is?

a)

1" X 2"

b)

2" X 2"

c)

2" X 3"

d)

2" X 4"

41.

What is the common trunking size used for single phase wiring?

a)

1" X 2"

b)

2" X 2"

c)

2" X 3"

d)

2" X 4"

42.

What is the rating of MCB for wiring 6 socket outlets (Ring Circuit)?

a)

6 Amp

b)

16 Amp

c)

20 Amp

d)

32 Amp

43.

What is the operating current of RCD for commonly used power circuits?

a)

10mA

b)

20mA

c)

30mA

d)

40mA

44.

Why must cables be marked during wiring?

a)

According to the supervisor's instructions

b)

To differentiate cables

c)

To facilitate work completion at terminals

d)

To ease repair work in case of damage

45.

What is the nominal voltage required for single phase installation?

a)

230V

b)

250V

c)

400V

d)

500V

46.

Which of the following is NOT a common size of current rating and sensitivity of RCD?

a)

63A/0.3A

b)

40A/100mA

c)

40A/300mA

d)

32A/100mA

47.

What testing device is used to measure earth electrode resistance?

a)

Multimeter

b)

RCCB tester

c)

Insulation tester

d)

Earth Resistance tester

48.

What happens when there is a leakage current to earth in a circuit?

a)

Earth leakage circuit breaker trips

b)

Voltage drop occurs in the circuit

c)

Fuse blows when supply is connected

d)

Earth leakage circuit breaker connects the circuit directly

49.

What type of earth electrode is commonly used for single phase supply houses?

a)

Aluminum strip

b)

Galvanized pipe

c)

Copper rod

d)

Copper tape

50.

Which of the following are methods to reduce earth electrode resistance EXCEPT?

a)

Spreading iron powder

b)

Watering with salt water

c)

Planting electrodes in parallel

d)

Planting electrodes closely together

51.

What is the most suitable cable size for surface wiring of lighting circuits?

a)

1.5 mm² pvc

b)

2.5 mm² pvc

c)

1.5 mm² pvc/pvc

d)

2.5 mm² pvc/pvc

52.

What is the cable size and fuse rating for 2 S.A.K 13Amp for surface wiring ring circuit?

a)

2.5 mm² pvc - 6 Amp

b)

2.5 mm² pvc - 20 Amp

c)

2.5 mm² pvc/pvc - 32 Amp

d)

2.5 mm² pvc/pvc - 20 Amp

53.

What is the cable size and MCB rating for S.A.K 13 Amp for surface wiring ring circuit?

a)

2.5 mm² pvc/pvc - 6 Amp

b)

2.5 mm² pvc/pvc - 10 Amp

c)

2.5 mm² pvc/pvc - 32 Amp

d)

2.5 mm² pvc/pvc - 20 Amp

54.

What is the minimum cable size suitable for surface wiring for S.A.K 15 Amp?

a)

4.0 mm² pvc

b)

4.0 mm² pvc/pvc

c)

6.0 mm² pvc/pvc

d)

1.25 mm² pvc/pvc

55.

Why must pvc/pvc type cables be used for surface wiring?

a)

To look neater

b)

According to the homeowner's requirements

c)

Pvc/pvc cables are cheap and readily available

d)

It is exposed to surrounding conditions and mechanical damage

56.

Which of the following is NOT categorized as an additional tool?

a)

Cable

b)

Ceiling rose

c)

Socket outlet

d)

Lamp holder

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