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Assessment 3- Unit 16 Verify compliance of low voltage systems
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1. You are not allowed to use your phone unless if permitted by the assessor
2. The test must be done in English language.
3. Arabic conversion is not allowed and be penalized if caught
4. Conversation either in English or Arabic is not allowed
5. Leave the exam room as soon as you finish
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Q1
Score: 1
Low resistance fault causing a fault current to flow
Caused by faulty appliances
Occurs in a sound circuit
Current greater than nominal flows
Q2
Score: 1
less than 0.5 ohm
less than 1 ohm
not less than 1Mohm
not less than 0.5 Mohm
Q3
Score: 1
The earth loop impedance
The effective operation of RCDs
The effective of controls and switch-gear
The protective devices are connected in the line conductor
Q4
Score: 1
severing live conductors with cable cutters
large machines (motors) starting up
insulation failure in a circuit
incorrect conductor terminations (L to E for example)
Q5
Score: 1
Indirect contact
Basic protection
Fault protection
d. Direct contact
Q6
Score: 1
confined
restricted
hazardous
dangerous
Q7
Score: 1
large overload faults
short circuits between live and neutral
earth-leakage faults
a nail hammered into a wall, shorting-out live and neutral
Q8
Score: 1
to provide as low resistance possible to the ground
to provide as high resistance possible to the ground
to provide flow of positive, negative and zero sequence currents
to provide over-current protection
Q9
Score: 1
Overcurrent protection only
30mA RCD protection and over-current protection
Splash proof protection
Incorporate an industrial type socket outlet
Q10
Score: 1
Polarity test
Insulation resistance test
Continuity test
RCD functional test
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