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Worksheets

SAP system

Total questions: 40

Worksheet time: 45mins

Name
Class
Date
1.

WHAT'S GOOD IN MOMBASA?

a)
The beaches
b)
The snow
c)
The desert
d)
The mountains
2.

HOW IS ELECTRIC POWER GENRATED?

a)

By burning fossil fuels

b)
By using solar panels
c)

By using wind turbines

d)

By using nuclear reactors

3.

WHO INVENTED TIME?

a)
Albert Einstein
b)
Isaac Newton
c)
No one, it's a natural phenomenon
d)
Galileo Galilei
4.

WHATS KILOWATT?

a)
A unit of power
b)
A type of car
c)
A type of food
d)
A type of animal
5.

The term given to the person responsible for an electrical system is the:

a)

Competent person

b)

Electrician

c)

Duty holder

d)

Company manager

6.

Which of the following earthing systems has the path for earth leakage currents via the earth itself:

a)

TN-S

b)

TNC-S

c)

TN-C

d)

TT

7.

Which of the following is the minimum short circuit test current for a low resistance ohmmeter?

a)

50 mA

b)

100 mA

c)

200 mA

d)

300 mA

8.

Which of the following is not permitted for use as an earth electrode:

a)

Underground structural metalwork

b)

Metal water mains pipes

c)

Lead sheaths of cables

d)

Earth plates

9.

Which of the following is not permitted for use as an earth electrode:

a)

Underground structural metalwork

b)

Metal water mains pipes

c)

Lead sheaths of cables

d)

Earth plates

10.

Which of the following would not be one of the human senses to use during the initial verification of an addition to a lighting circuit:

a)

Sight

b)

Hearing

c)

Taste

d)

Touch

11.

What are they called?

a)

pliers

b)

scissors

c)

screwdrivers

d)

wire strippers

12.

What are they?

a)

scissores

b)

screwdrivers

c)

pliers

d)

cable strippers

13.

We make holes by this tool.

a)

clamp

b)

drilling machine

c)

hammer

d)

soldering

14.

which of the following is a pvc cable?

a)

b)

c)

d)

15.

in wiring system, cheapest and simple method is...…..

a)

surface wiring

b)

trunking method

c)

steel conduits

d)

Busbar method

16.

The term given to the person responsible for an electrical system is the:

a)

Competent person

b)

Electrician

c)

Duty holder

d)

Company manager

17.
Identify the electrical symbol
a)
1 way switch
b)
2way switch
c)
intermediate switch
d)
flux capacitor
18.
Identify the electrical symbol
a)
1 way switch
b)
2way switch
c)
intermediate switch
d)
flux capacitor
19.
what is the electrical symbol shown?
a)
Double poll switch
b)
emergency light
c)
double socket
d)
Pull switch
20.
what is the BS number for a semi-enclosed rewirable fuse?
a)
BS 7671
b)
BS 61009
c)
BS 60947-3
d)
BS 3036
21.
Which protective device will protect against high fault currents?
a)
HRC Fuse
b)
Circuit Breaker
c)
3036 fuse
d)
RCD
22.
Which protective device protects against earth leakage and overload protection?
a)
RCD
b)
MCB
c)
HRC
d)

FUSE

23.
What is the Correction factor symbol for ambient temperature?
a)
Ca
b)
Ci
c)
Cg
d)
Cf
24.
Name the extraneous conductive part
a)
Socket cover
b)
PVC switch
c)
Central heating pipework
d)
Cable tray
25.
Identify the exposed conductive part.
a)
PVC conduit
b)
Metal trunking
c)
Ventilation ductwork
d)
oil pipes
26.
Which earthing system uses a combined earth and neutral conductor?
a)
TN-C-S
b)
TT
c)
TNS
d)
TNC
27.

What does A.C stand for?

a)

Alternating Current

b)

Alternating copper

c)

ohms

d)

A.C

28.

The si unit for magnetic flux?

a)

voltage

b)

angles

c)

watts

d)

theta

29.

If 10m of cable is 5 ohms, What is the resistance 80m?

a)

50 ohms

b)

40 ohms

c)

35 ohms

d)

100 ohms

30.

what charge do neutrons have in an atom

a)

neutral

b)

positive

c)

negative

d)

not enough

31.

4mm2 csa twin cable feeding a motor 150m away. take the resistivity of copper to be 17.2x109 ohm/metre3. find the resistance?

a)

0.089 ohms

b)

23.45632 ohms

c)

1.29 ohms

d)

2.2132 ohms

32.

what is the si unit for weight?

a)

mass

b)

weight

c)

newtons

d)

kilograms

33.

name all 3 effects on electrical current

a)

heat , chemical , attraction

b)

thermal,chemical,magnetic

c)

temperature, chemical ,metallic

d)

fire , chemical , magnets

34.

what is the si unit for power?

a)

power

b)

wats

c)

watts

d)

electric

35.

(17.2 x 10-9 x 200)

(25 x 10-6 )

a)

0.1376

b)

1.123

c)

0.258

d)

2

36.

which is a sine wave

a)
b)
c)
d)
37.

what is the si unit for mass?

a)

gravity

b)

kg

c)

newtons

d)

grams

38.

what's the equation for force?

a)

mass x distance

b)

force/ gravity

c)

force x distance

d)

mass x Gravity

39.

what symbol shows flowing into the conductor

a)
b)
40.

what does D.C current stand for?

a)

digital camera

b)

direct current

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