Quiz
Unit 203 Revision: Installation Technology Question Bank No.1
Questions in this quiz (40)
1A BS3036 protective device is a
- ARewireable fuse
- BCartridge fuse
- CType B MCB
- DType C MCB
- ARewireable fuse
2A cable has resistance of 0.12 ohms and a current of 30A. The volt drop due to resistance is
- A10.6V
- B3.6V
- C2.6V
- D7.6V
3A circuit supplying kitchen appliances would be identified as
- AHeating
- BCooker
- CLighting
- DPower
4A circuit to supply hot water would be identified as
- AFloor warming installations
- BHeating
- CPower
- DMotor
5A common method of providing protection by fault protection
- AADS (Automatic disconnection of supply)
- BEnclosures
- CPlacing out of reach
- DInsulation
6A method of protection against electric shock is provided in a cable by
- ARCDs
- BBarriers
- CAutomatic Disconnection of Supply (ADS)
- DInsulation
7A work plan for new installations provides:
- ACost of materials
- BEstimates of timescale
- CSafety information
- DInstructions for all workers
8A requirement for safety that all installations should have is
- AOvercurrent protection
- BEnergy meter
- CFire alarm
- DIndication of supply failure
9A short circuit occurs
- ABetween two conductors on the same phase
- BBetween two conductors at different potential
- CBetween two conductors at the same potential
- DIn a circuit that is electrically sound
10A single pole switch breaks
- AThe line and neutral conductors
- BThe neutral conductor
- CThe circuit protective conductor
- DThe line conductor
11A typical system application for fibre optic cable is:
- AFire alarms
- BData communications
- CEmergency management
- DEnvironmental control
12A voltage of 400kV represents the following voltage
- A0.4V
- B40000V
- C0.04V
- D400000V
13Aluminium may be used as a conductor in preference to copper as it is
- ALess likely to corrode
- BIs lighter
- CIs easier to terminate
- DIs a better conductor
14Aluminium spiral fixings are used to fix items on
- AConcrete
- BBrick
- CRoof tiles
- DPlaster board
15An Earthing system that uses a separate conductor as a return path for any fault current is called
- ATN-C-S
- BTT
- CTN-S
- DIT
16An example of overload is
- AA 13 amp socket outlet with a 100W lamp connected
- BA 13amp socket outlet with a 2kW fire connected to it
- CA lighting circuit with a 100W lamp connected
- DA lighting circuit with a 2 kW heater connected
17An RCD is a device used to protect circuits against
- AOverload and Earth faults
- BEarth faults only
- COverload and Short Circuits
- DShort circuit only
18Automatic disconnection of supply and special locations are found in
- ABS 7671
- BElectricity at Work Regulations
- CJane Austin Novel
- DHealth and Safety Policy
19Best location for a solar panel
- AOn the roof of a building facing north
- BOn the side of a chimney
- COn the shaded part of the roof
- DOn the roof of a building facing south
20BS 3036 Fuses
- ACannot be tampered with
- BAre accurate at determining overload current
- CWill not cause damage in the event of severe short circuit
- DHave a re-wireable element
21Circuit breakers are frequently installed in preference to fuses because
- AThey are adjustable
- BThey do not need replacing after operation
- CThey are less sensitive to some types of fault
- DThey are cheaper than fuses
22Circuit breakers use two forms of operation
- AThermal and magnetic
- BThermal and bi- metallic strip
- CFuse element and magnetic
- DThermal and fuse element
23Define the term for a Circuit Protective Conductor (CPC)
- AA cable that links all extraneous conductive parts backs to the MET
- BIt is the cable that connects from the MET to the star point of the sub station
- CIt relates to the types of dangerous gases that are released into the atmosphere
- DA cable that links all exposed conductive parts back to the MET
24Determine 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).
- A16mm
- B20mm
- C25mm
- D32mm
25Determine 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).
- A20mm
- B16mm
- C32mm
- D25mm
26Equipment identified in BS 7671 by an EN number must comply with the relevant requirements of:
- AExtra neutral provision
- BEuropean standards
- CEconomic standards
- DEnglish standards
27ES lamp holders, the outer casing must be connected to
- ANeutral conductor
- BLine conductor
- CEarth conductor
- DAll conductors
28Excess current, flowing in a circuit which is electrically sound, is defined as
- AShort-circuit current
- BEarth fault current
- COpen-circuit current
- DOverload current
29From BS 7671 the disconnection time for circuits supplying equipment and circuits up to 32A is :
- A0.2s
- B0.04s
- C0.4s
- D5s
30What does Ze represent from the following formula Zs = Ze + (R1 + R2)?
- AInternal Earth Fault Loop Impedance
- BResistance of the circuit protective conductor
- CExternal Earth Fault Loop Impedance
- DResistance of the line conductor
31What does R1 represent from the following formula Zs = Ze + (R1 + R2)?
- ADesign Current
- BResistance of the circuit protective conductor
- CResistance of the line conductor
- DExternal Earth Fault Loop Impedance
32From the On-site-Guide the maximum external earth loop impedance for a TN-C-S system is?
- A0.08 ohms
- B0.8 ohms
- C0.85 ohms
- D0.35 ohms
33From the On-site-Guide the maximum external earth loop impedance for a TN-S system is?
- A0.8 ohms
- B0.75 ohms
- C0.35 ohms
- D0.08 ohms
34Holes between joists must be of a minimum distance from top or bottom fixing surface of
- A10mm
- B20mm
- C50mm
- D60mm
35Identify the distribution voltage for a large story building with a private transformer
- A11kv
- B400v
- C110v
- D12v
36IET Wiring regulations give directives on electrical installations in hazardous environments, however the statutory governing these situations are covered in the:
- ABritish Standards
- BElectricity at Work Regulations 1989
- CApproved Codes of Practice
- DHealth & Safety at Work Act 1974
37IET Wiring regulations apply particularly to:
- AMining industry
- BAll branches of industry
- CElectrical manufacturing industry
- DElectrical contracting industry
38IET Wiring regulations recommend inspection of temporary construction site installation every:
- A1 month
- B3 months
- C12 months
- D24 months
39If a 20mm steel conduit was to be installed horizontally what would be the maximum spacing of supports
- A1.00m
- B1.75m
- C2.25m
- D0.75m
40If a 30A fuse has a tripping characteristic of 5 x In, what would be the instantaneous tripping current?
- A30A
- B600A
- C150A
- D60A
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- C&G 2365 Level 2 Unit 203 Revision OB
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- james seaman
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