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Unit 18 - Prepare for general electrical installations Quiz 5
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Q1
Score: 1
the current of the active and associated protective earthing conductor and the route length
the resistance of the active and associated protective earthing conductors and route length
the voltage of the active and associated protective earthing conductors and route length
the reactance of the active and associated protective earthing conductors and route length
Q2
Score: 1
none of these
HRC/HBC
cartridge type
semi-enclosed
Q3
Score: 1
A
B
C
D
Q4
Score: 1
must be low enough to generate sufficient fault current to operate the circuit protective device within an adequate time
must be high enough to generate sufficient fault current to operate the circuit protective device within an adequate time
must be equal to generate sufficient fault current to operate the circuit protective device within an adequate time
must be critically high enough to generate sufficient fault current to operate the circuit protective device within an adequate time
Q5
Score: 1
2 to 3 times the rated current
3 to 5 times the rated current
5 to 10 times the rated current
10 to 50 times the rated current
Q6
Score: 1
Ensures there is no under voltage in the system
Reduces the cost of the installation
Prevent total loss of all systems in the event of an earth fault occurring on any single plugged in appliance
Ensures the switchboards are not over loaded
Q7
Score: 1
Number of poles
Types
Method of mounting
Value of rated voltage, frequency and current
Q8
Score: 1
5 to 10 mA within 40mS
30mA at 300mS
150mA at 40mS
200mA at 25mS
Q9
Score: 1
High Blow Capacity
High Breaking Capability
High Blow Capability
High Breaking Capacity
Q10
Score: 1
PCB
HRC
MCB
RCD
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