Welcome to your 18th Edition 60 mins
1.
What is the K value to calculate the time a given fault will raise the live conductors from the highest permissible temperature of a copper 2.5mm Thermoplastic PVC 70 degrees celsius cable?
2.
Where a 3-core cable, with cores coloured brown, black and grey, is used as a switch wire for two-way or intermediate control. The terminations of the conductors shall be identified using?
3.
The maximum temperature for an accessible part of non-metallic equipment intended to be touched but not held is:
4.
On caravan sites, overhead conductors in areas subject to vehicle movement shall be placed at a minimum height above ground of?
5.
Electrical equipment installed outside in caravan parks shall be protected against mechanical stresses to a minimum of?
6.
A cable concealed in a wall outside the prescribed zones at a depth of less than 50 mm must?
7.
To ensure continuity of supply to one part of the installation in the event of failure of another part, one approach is
8.
Where a device is fitted with a temperature cut-out where risks of fire exist should
10.
What does the abbreviation PEI stand for?
11.
A firefighters switch, shall be provided in the low voltage circuit supplying exterior electrical installations and interior discharge lighting operating at?
12.
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
13.
In a swimming pool or other basin, the metallic covering or sheath of a wiring system in zones 0,1 or 2 shall?
14.
An RCD that is installed for protection against the risk of fire where combustible materials are stored shall be?
15.
The maximum disconnection time for a circuit supplied by a reduced low voltage system using a 110 V midpoint earthed transformer is
16.
An approximation of the prospective fault current between line conductors, of a 3 phase supply can be determined by?
17.
Low voltage as defined as a value not exceeding
18.
When considering the fundamental principles, which of the following should a designer have knowledge of relative to the Nature of demand?
19.
Electrical equipment with reinforced insulation provides?
20.
Which of the following would be included under part 7 of BS7671
21.
20A final circuit is the wiring between?
22.
Protection against overvoltages of atmospheric origin is set out in Section:
23.
Which of the following forms part of the assessment of general characteristics?
24.
The image represents which type of earthing system?
25.
The minimum information contained on a periodic inspection and testing notice would be the?
26.
A simple method to allow for measured values of loop impedance to be effectively compared with BS7671 tabulated maximum values, is to correct these maximum values by multiplying them by?
27.
Which of the following systems shall not be used to supply equipment used in repair and alteration work on construction sites?
28.
What should be made part of a PEI design to help combine information or data from or to the DNO, Electricity supplier and user?
29.
Multicore cables on a perforated tray are covered by reference method?
30.
A single pole switch shall be connected in the