Worksheets18th edition part 2 mock 1
Total questions: 10
Worksheet time: 20mins
Name
Class
Date
1.
The algebraic sum of the currents in the live conductor of a circuit at a point in the electrical installation is known as the?
a)
a) Return current
b)
b) Surge current
c)
c) Residual current
d)
d) Design current
2.
What is the maximum distance defined by 'arms reach? a) 1.25 m
a)
a) 1.25 m
b)
b) 0.75 m
c)
c) 2.5 m
d)
d) 6 m
3.
What is this statement a definition of: 'Protection against electric shock under fault-free conditions?
a)
a) Fault protection
b)
b) Direct contact
c)
c) Indirect contact
d)
d) Basic Protection
4.
Where can further information on Zx be found?
a)
a) Part 2
b)
b) Part 3
c)
c) Appendix 4
d)
d) Appendix 13
5.
The freedom from supply interruption is known as?
a)
a) Efficiency of supply
b)
b) The no-break period
c)
c) Continuity of service
d)
d) Regular supply
6.
In the case of a voltage disturbance causing a power frequency fault voltage appearing on the LV side, between the exposed-conductive parts and earth, what symbol is used?
a)
a) Uo
b)
b) Uf
c)
c) Ux
d)
d) U1
7.
What is defined here: 'An enclosure of metal other than trunking or conduit, that is used for the protection of cables drawn in after the ducting is erected'?
a)
a) Cable tray
b)
b) Cable tunnel
c)
c) Cable ducting
d)
d) Cable ladder
8.
A switching device capable of operation other than by hand is known as a?
a)
a) Control and protective switching device
b)
b) Manual relay
c)
c) Contactless contactor
d)
d) Automatic distribution device
9.
Band II voltages do not exceed
a)
a) 2500 v de
b)
b) 1700 v de
c)
c) 1000 v ac r.m.s
d)
d) 1600 v ac r.m.s
10.
What is the correct name for a protective conductor that provides equipotential bonding?
a)
a) Bonding conductor
b)
b) Earth conductor
c)
c) Earthing conductor
d)
d) Supplementary equipotential bonding conductor
100 %
