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Unit 203 Revision: Installation Technology Question Bank No.1

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C&G 2365 Level 2 Unit 203 Revision OB
james seaman
Quiz by james seaman, updated more than 1 year ago More Less
Oliver Balay
Created by Oliver Balay over 9 years ago
james seaman
Copied by james seaman over 7 years ago
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Question 1

Question
A BS3036 protective device is a
Image:
37ad2604-d3f2-4629-b4f3-ce6c3f0f01ed (image/jpg)
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
Image:
74de2c26-6009-4be8-ba7a-941112208beb (image/jpeg)
Answer
  • Heating
  • Cooker
  • Lighting
  • Power

Question 4

Question
A circuit to supply hot water would be identified as
Image:
5f41f069-4d65-4bec-ad58-eef62652ae4a (image/jpg)
Answer
  • Floor warming installations
  • Heating
  • Power
  • Motor

Question 5

Question
A common method of providing protection by fault protection
Image:
c3cbf17e-dc1e-4fb1-998a-8c456b837fb0 (image/jpg)
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
Image:
742a65fd-fc8f-4104-b698-345252a27285 (image/jpg)
Answer
  • RCDs
  • Barriers
  • Automatic Disconnection of Supply (ADS)
  • Insulation

Question 7

Question
A work plan for new installations provides:
Image:
544e6ce9-0a92-4255-bdf2-2a82ddae1eaa (image/jpg)
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
Image:
8c0286f1-af47-4f9e-86ad-7636892c74e5 (image/jpg)
Answer
  • Overcurrent protection
  • Energy meter
  • Fire alarm
  • Indication of supply failure

Question 9

Question
A short circuit occurs
Image:
e101df1a-70cd-4f4a-b643-37e04d9bdcb9 (image/jpg)
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
Image:
692de87c-28e0-4221-a454-fc4b5475d345.JPG (image/JPG)
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:
Image:
f03e968d-1899-46d0-9e60-f162e746b66b (image/jpg)
Answer
  • Fire alarms
  • Data communications
  • Emergency management
  • Environmental control

Question 12

Question
A voltage of 400kV represents the following voltage
Image:
90ee9309-60ac-4fb2-bf7b-1fea35d90c58 (image/jpg)
Answer
  • 0.4V
  • 40000V
  • 0.04V
  • 400000V

Question 13

Question
Aluminium may be used as a conductor in preference to copper as it is
Image:
c2c79087-5eb0-4983-86db-b592a10443d0 (image/jpg)
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
Image:
eb680158-58ee-4d29-96e8-14853edc2b47 (image/jpg)
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
Image:
3e43b53a-114e-4efa-a85c-93fd2b1f3035 (image/jpg)
Answer
  • TN-C-S
  • TT
  • TN-S
  • IT

Question 16

Question
An example of overload is
Image:
557e248b-7fd8-4fcf-9c20-100bdf0ee158 (image/jpg)
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
Image:
d264ae01-83ca-4f02-b19d-7e7041d8c55f (image/png)
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
Image:
d618c4e7-439e-4a9f-ac8a-479e812d2f93 (image/jpg)
Answer
  • BS 7671
  • Electricity at Work Regulations
  • Jane Austin Novel
  • Health and Safety Policy

Question 19

Question
Best location for a solar panel
Image:
0c986589-85b3-4650-bc04-e4a9fc5ef755 (image/jpg)
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

Question
BS 3036 Fuses
Image:
dcca8144-75f1-41c8-9e48-8211be7e2232 (image/jpg)
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
Image:
b1e531f6-623b-44d9-83f4-57561833e6ea (image/png)
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
Image:
bcb53daf-fc0e-4e6b-9a54-a5ae42a56055 (image/png)
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)
Image:
a31f75f5-ae54-43a5-b0c5-c1ef5223c225 (image/jpg)
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).
Image:
42a7d18e-21d3-4b77-94fa-5793d90ab327 (image/jpg)
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).
Image:
d44ed4b6-8c9f-48f9-889c-d65dbfb3f156 (image/jpg)
Answer
  • 20mm
  • 16mm
  • 32mm
  • 25mm

Question 26

Question
Equipment identified in BS 7671 by an EN number must comply with the relevant requirements of:
Image:
571163ea-c976-4814-a000-fced822072e5 (image/png)
Answer
  • Extra neutral provision
  • European standards
  • Economic standards
  • English standards

Question 27

Question
ES lamp holders, the outer casing must be connected to
Image:
d130852a-b2b2-4313-b4c7-82460f3599be (image/jpg)
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
Image:
ece5a0d9-c155-4d3b-9fb4-3fd7a48b1561 (image/jpg)
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 :
Image:
29633cfd-e24e-41d5-8526-b6d2d6c54a8c (image/jpg)
Answer
  • 0.2s
  • 0.04s
  • 0.4s
  • 5s

Question 30

Question
What does Ze represent from the following formula Zs = Ze + (R1 + R2)?
Image:
c8110bd4-f727-4435-8bca-a19c45ae2e93 (image/jpg)
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)?
Image:
312afdb4-e461-424b-b63e-b3070d6dbeb8 (image/jpg)
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?
Image:
5973ec72-5b25-4727-9498-fd4439fdeb55 (image/jpg)
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?
Image:
6fbb6125-9cd6-4f5e-b72d-ba16bed4f9c7 (image/jpg)
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
Image:
3b5420d1-fd29-4133-bb61-c9433ef2a0ba (image/jpg)
Answer
  • 10mm
  • 20mm
  • 50mm
  • 60mm

Question 35

Question
Identify the distribution voltage for a large story building with a private transformer
Image:
60f43ca2-cdfb-410a-86ed-5c28a52e68c0 (image/jpg)
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:
Image:
dca1ff1a-5c34-4463-8fdc-40153b477f65 (image/jpg)
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:
Image:
a605f9c0-fb6b-4c63-ab3d-600330e56051 (image/jpg)
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:
Image:
de0df4da-998c-486f-ad52-f875d70002dd (image/jpg)
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
Image:
3c50c50c-6ffb-4aec-853d-e4d15c252505 (image/jpg)
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?
Image:
07788800-49fe-4d95-ae24-2261c4ff7b10 (image/jpg)
Answer
  • 30A
  • 600A
  • 150A
  • 60A
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