MOCK EXAM from past papers - No. 2

46) The minimum value of insulation resistance of a 230v lighting circuit is
a) 0.5MΩ
b) 1 MΩ
c) 1.5MΩ
d) 5 MΩ

47) The test voltage for carrying out an insulation test on a PELV system is
a) 100v
b) 250v
c) 500v
d) 1000v

48) Self supported suspension cables within agricultural situations should be
a) at a height of at least 2M
b) at a height of at least 4M
c) at a height of at least 6M
d) at a height of at least 10M

49) Special locations do not include
a) new buildings
b) earthworks
c) engineering works
d) surface mining

50) Additional protection in a room containing a sauna would be
a) barriers
b) placing out of reach
c) IPX6 rated accessories
d) by way of RCD

51) The specific IP rating for areas within zone 1 of a bathroom is
a) IPXXB
b) IP2X
c) IPX7
d) IPX4

52) In a bathroom zone 0 is defined as the
a) area outside a 0.60m circumference from the bath or shower
b) area within a 0.60m circumference from the bath or shower
c) area directly above the bath or shower up to 2.25m above the finished floor level
d) area within the bath or shower

53) Heating units designed to be used underfloor should have a minimum IP rating of
a) IP4X
b) IP67
c) IPX7
d) IPX2

54) Circuits within booths at fairground premises should be protected at the origin of the installation by at least a
a) 500mA RCD
b) 300mA RCD
c) 100mA RCD
d) 10mA RCD

55) In marina installations that are in an area subject to vehicle movement, overhead distribution cables shall be installed at a height of
a) 5m
b) 7m
c) 6m
d) 8m

56) Socket outlets supplying caravan pitches should be to
a) BS 60309-2 and IP65 rated
b) BS 60309-2 and IP44 rated
c) BS 61009-2 and IP44 rated
d) BS 61009-2 and IPX4 rated

57) Socket outlets supplying caravan pitches should be at a height of
a) 0.5m off the ground
b) 0.25m off the ground
c) 0.5m to 1.5m off the ground measured to the highest part of the socket outlet
d) 0.5m to 1.5m off the ground measured to the lowest part of the socket outlet

58) The correction factor for cables installed in free air with 70oC thermosetting insulation and an ambient temperature of 50oC is
a) 0.71
b) 0.17
c) 0.57
d) 0.77

59) The correction factor for cables installed in free air with 90oC thermosetting insulation and an ambient temperature of 40oC is
a) 0.76
b) 0.69
c) 0.96
d) 0.86

60) BS EN 60228 relates to
a) conduit systems
b) conductors of insulated cables
c) cable trunking and ducting systems
d) industrial plugs, couplers and socket outlets