18th edition complete mock 5

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

Band II voltages do not exceed

• a)         2500 v de
• b)          1700 v de
• c)         1000 v ac r.m.s
• d)        1600 v ac r.m.s

What is the correct name for a protective conductor that provides equipotential bonding?

• a)         Bonding conductor
• b)        Earth conductor
• c)         Earthing conductor
• d)         Supplementary equipotential bonding conductor

Installations are divide into circuits for a given reason, which option below is not a Iisted reason?

• a)       Safe Inspection
• b)       Testing
• c)         Maintenance
• d)       To reduce the current in multiple cables

Which of the following options is not a check for compatibility of characteristics of equipment used?

• a)       High frequency oscillations
• b)        Maintainability of equipment
• c)        Transient overvoltage
• d)       Harmonic currents

The number or final circuit required, and the number of points supplied by any final circuit shall be such as to facilitate compliance with the requirements of Chapter 43 as regards?

• a)        Current-carrying capacity of conductors
• b)        Isolation
• c)         Overcurrent protection
• d)        Switching

Which of the following is an assessment of general characteristics?

• a)       The external influences to which it is to be exposed
• b)       The internal electro-magnetic compatibility
• c)        The rating of the main cut-out fuse
• d)       The earthing arrangements