18th Edition Part 1 Mock 2

Which one of these does BS 7671 NOT apply to?

• a)       d.c. cathodic protection systems
• b)        Operation and maintenance gangways
• c)        Horticultural premises
• d)       Highway equipment

The cross-sectional area of conductors shall be determined for normal operating conditions and fault conditions according to?

• a)       The electromagnetic interference
• b)       Harmonics
• c)        The number of bunched cables in trunking
• d)       The working height the cables are located

When electrical equipment is selected, its power characteristics need to take into account?

• a)         Load factor
• b)        Load distribution
• c)         Fault conditions
• d)         Short-circuit conditions

Where an electrical supply system is provided for standby electrical supply systems, what must be determined?

• a)        Any special conditions such as harmonics
• b)         Daily and yearly variation of demand
• c)         Loads to be expected on the various circuits
• d)        Characteristics of the supply

Which of these is non-statutory?

• a)        ESQCR
• b)        RIDDOR
• c)        HASAWA
• d)        BS 7671

What does BS7671 apply to?

• a)        Prefabricated buildings
• b)        Ships
• c)         Mines
• d)        Lift installations covered by BS 5655

Which standard, for the selection of electrical equipment, cannot be used?

• a)       To BS EN
• b)       To IEC
• c)        To BS
• d)       To your own standard

What characteristic of the supply is not required to be included in documentation that should accompany an electrical installation certificate in commercial premises?

• a)            The circuits insulation resistance value
• b)            The nominal frequency
• c)             The prospective short-circuit current
• d)            The nominal voltage

In electrical installations, where the protection of safety is paramount the risk of injury may result from?

• a)       Ignition of a potentially explosive atmosphere
• b)       The apprentice leaving live wires exposed
• c)        The incorrect equipment being used
• d)        Non-skilled persons working on electrical equipment

BS 7671 is NOT intended to provide safety from electric shock, which may result from?

• a)        Interruptions of supply in an operating theatre
• b)        Unauthorized access to railway signaling equipment
• c)        Interruptions of electrical supply at a travelling fair
• d)        Shock currents on a marina