Welcome to your 18th Edition 60 mins
2.
If Ze is measured at 1.40Ω and R1+R2 is measured as 0.12Ω, what is the value of Zs?
3.
A circuit protective conductor is
4.
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
5.
Multicore cables on a perforated tray are covered by reference method?
6.
The maximum value of voltage drop for lighting in a low voltage installation, supplied from a public distribution system is?
7.
When cables are placed directly in the ground they should be buried at a depth?
8.
When assessing the frequency and quality of maintenance of an installation the person responsible for the operation and/or maintenance of the installation shall be:
9.
Prospective fault current for a single phase supply, is recorded using the highest value determined from the prospective?
10.
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?
11.
The maximum length of a flexible cord or cable for a caravan connection is?
12.
Which of the following, is the symbol for a "class P" thermally protected independent lamp ballast permitted for mounting on a flammable surface?
13.
What is the maximum operating current for an RCD, which may supply portable equitable used outdoor?
14.
On completion of a periodic inspection, what should be reported to the customer
15.
A cable concealed in a wall outside the prescribed zones at a depth of less than 50 mm must?
16.
Methods of inspection and testing are described in which Guidance Note?
17.
BS 5839 deals with the system design, installation and servicing of?
18.
Which one of the following describes the purpose of supplementary bonding between exposed extraneous parts
19.
IET regulation BS7671 applies for
20.
Which one of the following is not a characteristic of the supply?
21.
Cables and equipment in circuits feeding motors shall be suitable for a current of at least?
22.
A PV convertor shall have a switch-disconnector provided on?
23.
Class II equipment is used as a measure of:
24.
Where a circuit needs undervoltage protection but does not present a danger when undervoltage to occurs for very short periods, a ..
25.
A firefighters switch, shall be provided in the low voltage circuit supplying exterior electrical installations and interior discharge lighting operating at?
26.
Diversity may be taken into account when considering
27.
The ambient air temperature rating factor for 90ºC thermosetting cables operating in an ambient air temperature of 60ºC is?
28.
In a swimming pool or other basin, the metallic covering or sheath of a wiring system in zones 0,1 or 2 shall?
29.
What is the maximum Zs for a 32A type B circuit breaker protecting a standard ring final circuit?
30.
Which of the following systems shall not be used to supply equipment used in repair and alteration work on construction sites?
By Neil