Welcome to your 18th Edition 60 mins
1.
A permanent warning notice must be fixed at or near the point of connection, of every earthing conductor to an earth electrode bearing the words?
2.
When cables are placed directly in the ground they should be buried at a depth?
3.
What will be the operating time for a 60A BS 3036 protective device when the value of fault current is 205A:
4.
BS 7671 does not apply to
5.
In a sauna which one of the zones has no special requirements concerning the heat resistance of the equipment?
6.
The minimum insulation resistance between conductors for an extra-low voltage circuit is?
7.
With reference to the nature of the supply, which one of the following can be determined by calculation, enquiry or measurement?
8.
Electric dodgems shall only be operated at voltages not exceeding?
9.
The maximum value of voltage drop for lighting in a low voltage installation, supplied from a public distribution system is?
10.
If Ze is measured at 1.40Ω and R1+R2 is measured as 0.12Ω, what is the value of Zs?
11.
Where may the risk of a shock by basic contact arise?
12.
If a 3 phase induction rotor bearing failed and the motor seized, the resulting condition that could follow would most likely be
13.
BS 5839 deals with the system design, installation and servicing of?
15.
A cable concealed in a wall outside the prescribed zones at a depth of less than 50 mm must?
16.
The minimum information contained on a periodic inspection and testing notice would be the?
17.
In the PEI concept of a Prosumer's Low Voltage Electrical Installation, what piece of Electrical Equipment is considered to be both a load and a generator?
18.
Electrical equipment installed outside in caravan parks shall be protected against mechanical stresses to a minimum of?
19.
The ambient air temperature rating factor for 90ºC thermosetting cables operating in an ambient air temperature of 60ºC is?
20.
In a situation that a BD4 condition applies, BS7671 states that any cables supplying safety circuits must
21.
A radial final circuit feeding socket-outlets supplying several items of data processing equipment, has a total protective conductor current in normal service of 18 mA. This circuit must have a high integrity protective conductor
22.
Methods of inspection and testing are described in which Guidance Note?
23.
Which of the following under certain conditions could be used as an earth electrode?
24.
In the latest colouring system the neutral in a three-phase AC system will be?
25.
When equipment is not covered by a known standard, the designer must confirm the same degree of safety as afforded by?
26.
The external influence code AA2 relaters to the ambient temperature range
27.
What should be made part of a PEI design to help combine information or data from or to the DNO, Electricity supplier and user?
28.
Protection against electric shock under single-fault conditions is defined as
29.
In a 230V TN system, for final circuits supplying fixed current using equipment not exceeding 32A the disconnection time is limited to:
30.
Where particular risks of fire exist, the classification for high density occupation areas with easy conditions of evacuation is
Hint