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AM2 Exam

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There are 30 questions in this AM2 mock exam. You must score 60% (18 out of 30) to pass. Good luck!

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1. What is the maximum earth fault loop impedance outside the consumers installation for a TN-S system: Mark one answer
A 0.37 Ω
B 0.8 Ω
C 200 Ω
D 21 Ω
Correct Answer: B 0.8 Ω
2. BS 7671 allows a number of devices to be used as isolators. One device which can NOT be used for this purpose is: Mark one answer
A Double pole switch
B Firefighters switch
C Semi-conductor device
D TP+N switch disconnector
Correct Answer: C Semi-conductor device
3. Which of the following types of RCD has is the general standard with no time delay built in: Mark one answer
A A Type
B G Type
C O Type
D S Type
Correct Answer: C O Type
4. Which of the following circuit breakers would be most suitable for use with circuits feeding large transformers: Mark one answer
A Type A
B Type B
C Type C
D Type D
Correct Answer: D Type D
5. The standard distribution voltage to light industry is: Mark one answer
A 11kV
B 132kV
C 33kV
D 400kV
Correct Answer: A 11kV
6. A typical insulator for an overhead line transmission system would be: Mark one answer
A Glass or porcelain
B Mica or butyl
C Rubber or pvc
D Wood or plastic
Correct Answer: A Glass or porcelain
7. By law electricity nominal supply voltages must be kept within: Mark one answer
A + 10% and - 6%
B + 10% and – 10%
C + 6% and – 10 %
D + 6% and – 6%
Correct Answer: A + 10% and - 6%
8. Which of the following systems has no moving parts: Mark one answer
A Grey water recycling
B Micro wind
C Micro-hydro
D Photovoltaic
Correct Answer: D Photovoltaic
9. What is the term for a number of Solar PV modules connected in series: Mark one answer
A A Chain
B A Module
C A Set
D A String
Correct Answer: D A String
10. When a regulation is termed - absolute- then that regulation: Mark one answer
A Is not compulsory
B Must be met regardless of costs
C Must be met within an agreed time
D Requires a competent electrician to complete
Correct Answer: B Must be met regardless of costs
11. Which of the following documents is not produced by the client: Mark one answer
A The order
B The specification
C The tender
D The variation order
Correct Answer: C The tender
12. A room measures 4.25 metres long, what would it measure on a drawing scaled at 1:20: Mark one answer
A 0.2125 cm
B 21.25 cm
C 212.5 cm
D 412 mm
Correct Answer: B 21.25 cm
13. The main purpose of an assembly diagram is: Mark one answer
A Show how the components fit together
B To provide different views of the components
C To show the sequence of control
D Use symbols to represent circuit components and show their connections
Correct Answer: A Show how the components fit together
14. What is the fault current required for a disconnection time of 0.1 second for a BS EN 60898 Type B 6A protection device as stated in BS 7671: Mark one answer
A 100 A
B 125 A
C 30 A
D 6:00 AM
Correct Answer: C 30 A
15. In the equation S = √I2 x t/k what does the symbol 'I' signify:: Mark one answer
A Circuit design current
B Circuit prospective fault current
C Current rating of the protective device
D Normal running current
Correct Answer: B Circuit prospective fault current
16. A warning notice must be fixed to all: Mark one answer
A Class II equipment
B Electric motors having a rating exceeding 0.37 kW
C Equipment operating in excess of 230V and where such voltage would not normally be expected
D Switchgear which cannot normally be observed by the operator
Correct Answer: C Equipment operating in excess of 230V and where such voltage would not normally be expected
17. Non-metallic conduit must only be used within suitable ranges of: Mark one answer
A Ambient temperatures
B Humidity
C Load currents
D Supply voltages
Correct Answer: A Ambient temperatures
18. Highest frequency data transmission rates can be achieved by the use of: Mark one answer
A Coaxial
B Fibre-optic
C STPs
D ScTPs
Correct Answer: B Fibre-optic
19. Escape lighting is required to operate for between: Mark one answer
A 0.5 to 1 hour
B 0.5 to 2 hours
C 1 to 2 hours
D 1 to 3 hours
Correct Answer: D 1 to 3 hours
20. Direct acting space heaters: Mark one answer
A Are cost efficient
B Give out heat at a steady rate
C Operate on the storage principle
D Respond immediately to temperature fluctuations
Correct Answer: D Respond immediately to temperature fluctuations
21. Efficacy is a measure of a lighting systems: Mark one answer
A Efficiency
B Lamp characteristics
C Likeness to natural sunlight
D Luminous intensity per watt input
Correct Answer: D Luminous intensity per watt input
22. Protection against objects greater than 1mm diameter has an IP classification of: Mark one answer
A IP2X
B IP3X
C IP4X
D IP6X
Correct Answer: C IP4X
23. The space factor for cables in trunking should not exceed: Mark one answer
A 30%
B 35%
C 40%
D 45%
Correct Answer: D 45%
24. Which of the following are standard sises of conduit: Mark one answer
A 16mm 20mm 30mm
B 20mm 25mm 16mm
C 25mm 22mm 16mm
D 30mm 25mm 20mm
Correct Answer: B 20mm 25mm 16mm
25. Inspection type conduit accessories are used to: Mark one answer
A Facilitate access to the conduit
B Facilitate the drawing in of cables into the conduit
C Strengthen the conduit
D Support the conduit
Correct Answer: B Facilitate the drawing in of cables into the conduit
26. The recommended wiring system use for use on a dairy farm is: Mark one answer
A Black enamel steel conduit
B P.v.c. conduit
C Stainless steel conduit
D Twin and c.p.c
Correct Answer: C Stainless steel conduit
27. The earthed neutral of the authorities supply must be fitted at the intake position with a: Mark one answer
A Circuit breaker
B Fuse
C Single-pole switch
D Solid link
Correct Answer: D Solid link
28. The main purpose of equipotential bonding is to: Mark one answer
A Improve the earth loop impedance
B Increase the impedance of the earth return
C Maintain adjacent metalwork at the same electrical potential
D Prevent earth faults
Correct Answer: C Maintain adjacent metalwork at the same electrical potential
29. If a main equipotential bonding conductor is connected to a gas pipe, the connection must be made within: Mark one answer
A 300mm of the meter on the consumers side
B 300mm of the meter on the supply side
C 600mm of the meter on the consumer's side
D 600mm of the meter on the supply side
Correct Answer: C 600mm of the meter on the consumer's side
30. A statutory regulation means that it has been: Mark one answer
A Agreed by BS7671
B Agreed by law
C Agreed by the electricity council
D Set by a learned body
Correct Answer: B Agreed by law