Unit 203 Revision: Installation Technology Question Bank No.1

Description

C&G 2365 Level 2 Unit 203 Revision OB
Oliver Balay
Quiz by Oliver Balay, updated more than 1 year ago
Oliver Balay
Created by Oliver Balay almost 9 years ago
29040
12

Resource summary

Question 1

Question
A BS3036 protective device is a
Answer
  • Rewireable fuse
  • Cartridge fuse
  • Type B MCB
  • Type C MCB

Question 2

Question
A cable has resistance of 0.12 ohms and a current of 30A. The volt drop due to resistance is
Answer
  • 10.6V
  • 3.6V
  • 2.6V
  • 7.6V

Question 3

Question
A circuit supplying kitchen appliances would be identified as
Answer
  • Heating
  • Cooker
  • Lighting
  • Power

Question 4

Question
A circuit to supply hot water would be identified as
Answer
  • Floor warming installations
  • Heating
  • Power
  • Motor

Question 5

Question
A common method of providing protection by fault protection
Answer
  • ADS (Automatic disconnection of supply)
  • Enclosures
  • Placing out of reach
  • Insulation

Question 6

Question
A method of protection against electric shock is provided in a cable by
Answer
  • RCDs
  • Barriers
  • Automatic Disconnection of Supply (ADS)
  • Insulation

Question 7

Question
A work plan for new installations provides:
Answer
  • Cost of materials
  • Estimates of timescale
  • Safety information
  • Instructions for all workers

Question 8

Question
A requirement for safety that all installations should have is
Answer
  • Overcurrent protection
  • Energy meter
  • Fire alarm
  • Indication of supply failure

Question 9

Question
A short circuit occurs
Answer
  • Between two conductors on the same phase
  • Between two conductors at different potential
  • Between two conductors at the same potential
  • In a circuit that is electrically sound

Question 10

Question
A single pole switch breaks
Answer
  • The line and neutral conductors
  • The neutral conductor
  • The circuit protective conductor
  • The line conductor

Question 11

Question
A typical system application for fibre optic cable is:
Answer
  • Fire alarms
  • Data communications
  • Emergency management
  • Environmental control

Question 12

Question
A voltage of 400kV represents the following voltage
Answer
  • 0.4V
  • 40000V
  • 0.04V
  • 400000V

Question 13

Question
Aluminium may be used as a conductor in preference to copper as it is
Answer
  • Less likely to corrode
  • Is lighter
  • Is easier to terminate
  • Is a better conductor

Question 14

Question
Aluminium spiral fixings are used to fix items on
Answer
  • Concrete
  • Brick
  • Roof tiles
  • Plaster board

Question 15

Question
An Earthing system that uses a separate conductor as a return path for any fault current is called
Answer
  • TN-C-S
  • TT
  • TN-S
  • IT

Question 16

Question
An example of overload is
Answer
  • A 13 amp socket outlet with a 100W lamp connected
  • A 13amp socket outlet with a 2kW fire connected to it
  • A lighting circuit with a 100W lamp connected
  • A lighting circuit with a 2 kW heater connected

Question 17

Question
An RCD is a device used to protect circuits against
Answer
  • Overload and Earth faults
  • Earth faults only
  • Overload and Short Circuits
  • Short circuit only

Question 18

Question
Automatic disconnection of supply and special locations are found in
Answer
  • BS 7671
  • Electricity at Work Regulations
  • Jane Austin Novel
  • Health and Safety Policy

Question 19

Question
Best location for a solar panel
Answer
  • On the roof of a building facing north
  • On the side of a chimney
  • On the shaded part of the roof
  • On the roof of a building facing south

Question 20

Answer
  • Cannot be tampered with
  • Are accurate at determining overload current
  • Will not cause damage in the event of severe short circuit
  • Have a re-wireable element

Question 21

Question
Circuit breakers are frequently installed in preference to fuses because
Answer
  • They are adjustable
  • They do not need replacing after operation
  • They are less sensitive to some types of fault
  • They are cheaper than fuses

Question 22

Question
Circuit breakers use two forms of operation
Answer
  • Thermal and magnetic
  • Thermal and bi- metallic strip
  • Fuse element and magnetic
  • Thermal and fuse element

Question 23

Question
Define the term for a Circuit Protective Conductor (CPC)
Answer
  • A cable that links all extraneous conductive parts backs to the MET
  • It is the cable that connects from the MET to the star point of the sub station
  • It relates to the types of dangerous gases that are released into the atmosphere
  • A cable that links all exposed conductive parts back to the MET

Question 24

Question
Determine the size of conduit required for a run of 2.7m, if you are installing 3 x 1.5mm² and 6 x 6mm² conductors (all stranded).
Answer
  • 16mm
  • 20mm
  • 25mm
  • 32mm

Question 25

Question
Determine the size of conduit required for a run of 2.9m, if you are installing 9 x 2.5mm² and 3 x 6mm² conductors (all stranded).
Answer
  • 20mm
  • 16mm
  • 32mm
  • 25mm

Question 26

Question
Equipment identified in BS 7671 by an EN number must comply with the relevant requirements of:
Answer
  • Extra neutral provision
  • European standards
  • Economic standards
  • English standards

Question 27

Question
ES lamp holders, the outer casing must be connected to
Answer
  • Neutral conductor
  • Line conductor
  • Earth conductor
  • All conductors

Question 28

Question
Excess current, flowing in a circuit which is electrically sound, is defined as
Answer
  • Short-circuit current
  • Earth fault current
  • Open-circuit current
  • Overload current

Question 29

Question
From BS 7671 the disconnection time for circuits supplying equipment and circuits up to 32A is :
Answer
  • 0.2s
  • 0.04s
  • 0.4s
  • 5s

Question 30

Question
What does Ze represent from the following formula Zs = Ze + (R1 + R2)?
Answer
  • Internal Earth Fault Loop Impedance
  • Resistance of the circuit protective conductor
  • External Earth Fault Loop Impedance
  • Resistance of the line conductor

Question 31

Question
What does R1 represent from the following formula Zs = Ze + (R1 + R2)?
Answer
  • Design Current
  • Resistance of the circuit protective conductor
  • Resistance of the line conductor
  • External Earth Fault Loop Impedance

Question 32

Question
From the On-site-Guide the maximum external earth loop impedance for a TN-C-S system is?
Answer
  • 0.08 ohms
  • 0.8 ohms
  • 0.85 ohms
  • 0.35 ohms

Question 33

Question
From the On-site-Guide the maximum external earth loop impedance for a TN-S system is?
Answer
  • 0.8 ohms
  • 0.75 ohms
  • 0.35 ohms
  • 0.08 ohms

Question 34

Question
Holes between joists must be of a minimum distance from top or bottom fixing surface of
Answer
  • 10mm
  • 20mm
  • 50mm
  • 60mm

Question 35

Question
Identify the distribution voltage for a large story building with a private transformer
Answer
  • 11kv
  • 400v
  • 110v
  • 12v

Question 36

Question
IET Wiring regulations give directives on electrical installations in hazardous environments, however the statutory governing these situations are covered in the:
Answer
  • British Standards
  • Electricity at Work Regulations 1989
  • Approved Codes of Practice
  • Health & Safety at Work Act 1974

Question 37

Question
IET Wiring regulations apply particularly to:
Answer
  • Mining industry
  • All branches of industry
  • Electrical manufacturing industry
  • Electrical contracting industry

Question 38

Question
IET Wiring regulations recommend inspection of temporary construction site installation every:
Answer
  • 1 month
  • 3 months
  • 12 months
  • 24 months

Question 39

Question
If a 20mm steel conduit was to be installed horizontally what would be the maximum spacing of supports
Answer
  • 1.00m
  • 1.75m
  • 2.25m
  • 0.75m

Question 40

Question
If a 30A fuse has a tripping characteristic of 5 x In, what would be the instantaneous tripping current?
Answer
  • 30A
  • 600A
  • 150A
  • 60A
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