18 Edition Part 5 (a)

Which one of the following devices would not be suitable for use as a circuit isolator? Mark one answer

• A. A contactor

• B. A device with semiconductors

• C. A fuse

• D. An RCD

Answer explanation

Amendment 2 (Brown Book) Reference: Page 184, table 537.4

Wiring systems shall be selected and erected so as to be suitable for?

• The highest and lowest local ambient temperature

• The maximum ambient temperature

• The maximum and minimum conductor temperature

• The maximum conductor temperature

Answer explanation

Amendment 2 (Brown Book) Reference: Page 141, section 522.1.1

Type 1 SPD's (Surge Protection Devices) are often referred to as?

• Earth bonding SPD's

• Equipotential bonding SPD's

• Exposed conductive SPD's

• Extraneous conductive SPD's

Answer explanation

Amendment 2 (Brown Book) Reference: Page 164, section 534.4.1.1

An item of switchgear is installed behind a fixed panel thus making the operation of the switchgear impossible for the operator to observe. In such situations a suitable indicator must be fixed in a position where the operator can see the effect of the operation, the indicator must comply with?

• BS EN 12954

• BS EN 3535

• BS EN 4444 or BS EN 6346

• BS EN 60073 and BS EN 60447

Answer explanation

Amendment 2 (Brown Book) Reference: Page 132, section 514.1.1

All outdoor lighting installations need to be carefully selected and erected, but which type of lighting is excluded from BS 7671? Mark one answer

• Advertising signs

• Festoon lighting that is temporary

• Phone kiosks

• Road lighting

Answer explanation

Amendment 2 (Brown Book) Reference: Page 220, section 559.1 (iii)

What is the maximum operating temperature for thermosetting cables?

• 105°C

• 70°C

• 80°C

• 90°C

Answer explanation

Amendment 2 (Brown Book) Reference: Page 145, table 52.1

What type of circuits do the images below represent? Mark one answer

• Auxiliary circuits

• Generator control circuits

• IT systems

• Safety services circuits

Answer explanation

Amendment 2 (Brown Book) Reference: Page 215, Figure 55.2 and section 557 in, page 216

In an electrical circuit, a junction box complying with BS 5733 need not be accessible for inspection, testing and maintenance if it bears the symbol?

• 
• 
• 
• 

Answer explanation

Amendment 2 (Brown Book) Reference: Page 149, section 526.3 (vi)

If the cross-sectional-area (c.s.a) of the supply PEN conductor where PME applies is 100 mm², what is the minimum size the main protective bonding conductor can be? Mark one answer

• 16 mm²

• 25 mm²

• 35 mm²

• 50 mm²

Answer explanation

Amendment 2 (Brown Book) Reference: Page 205, table 54.8

A PEN conductor when insulated can use the following insulation colour? Mark one answer

• A Blue only

• B Green only

• C Green-and-Yellow only

• D Green-and-Yellow throughout its length with blue markings at the terminations

Answer explanation

Amendment 2 (Brown Book) Reference: Page 132, section 514.4.3