1. In a star connected three phase transformer the

* a) Three phases are connected together at the start point
* b) Three phases are separate
* c) Neutral conductor is connected to a single phase
* d) Neutral conductor is electrically separated

Answer - a

2. A single-phase double-wound transformer consists of

* a) A single core mounted winding
* b) A winding that carries the difference between IP and IS
* c) A single solid core
* d) Two electrically separated coils

Answer - d

3. One method of insulating windings is to use

* a) Shelac
* b) High reluctance silicon steel
* c) Low frequency dust cores
* d) PVC

Answer - a

4. The usual method of insulating core laminations is

* a) Low reluctance silicon steel
* b) Surface oxidization
* c) High frequency air cores
* d) Cellulose paper

Answer - b

5. If a motor is required to start against a large starting current, it is usual to use

* a) Direct on line starter
* b) Face plate starter
* c) Step down centre tapped starter
* d) Rotor resistance starter

Answer - d

6. In a shunt-wound motor the field coil is connected in

* a) Series with the armature
* b) Series with the motor
* c) parallel with the armature
* d) parallel with the motor

Answer - c

7. When the field windings of an electrical machine are not connected to its own armature, it is known as

* a) Self- excited
* b) Polyphase
* c) Separately-excited
* d) Synchronous

Answer - c

9. Particular starting arrangements are used when a motor has a rating greater than

* a) 370 microwatts
* b) 0.37 watts
* c) 37 watts
* d) 370 watts

Answer - d

10. An isolator built into a panel is used for

* a) Normal load switching
* b) Fault load switching
* c) Short circuit protection
* d) No load switching

Answer - d

11. A device with a BS EN number has been

* a) Agreed for use only within the UK
* b) Agreed for operational use within the EU
* c) Standardized for all operational uses only in the UK
* d) Standardized for use in the EU

Answer - d

12. Q8 BS 7671 provides appropriate advice on

* a) Heights of panels
* b) Design of panels
* c) Environmental conditions
* d) Instrumentation

Answer - c

13. What degree of protection is specified for protection against a BS finger?

* a) IP4XB
* b) IP5XB
* c) IP6XB
* d) IPXXB

Answer - d

14. Which of the following is statutory?

* a) BS 7671
* b) On-Site Guide
* c) Electricity at Work Regulations
* d) GS 38

Answer - c

15. Which of the following are appropriate tests for a completed panel?

* a) Flash testing of components
* b) Insulation resistance and polarity
* c) Inspection of conductors for current carrying capacity
* d) Identification of conductors

Answer - b

16. The purpose of a switch is to open or close a circuit

* a) In the event of a fault current
* b) Under load conditions
* c) Under overload conditions
* d) Automatically after a fault has been repaired

Answer - b

17. A common type of cable termination used for ribbon cables in panel building is

* a) Pin
* b) Lug
* c) Insulation displacement
* d) Screw

Answer - c

18. A moving coil meter is not used on an ac circuit because

* a) It cannot read very small variations
* b) The direction of the deflection depends upon the direction of the current
* c) It is non linear
* d) It does not use the damping effect

Answer - b

19. To ensure safe isolation, voltage indicating devices

* a) Must comply with BS 7671
* b) Are used to prove the circuit dead only
* c) Are used to prove the circuit was alive only
* d) Must be “proved” prior to and “re-proved” after isolation

Answer - d

20. Which of the following is not a factor, which would affect the type of termination?

* a) Circuit design current
* b) Physical space around terminations
* c) Presence of solid foreign bodies
* d) Size of conductor

Answer - c

21. Which of the following has an adverse effect on installed equipment?

* a) Eddy current damping
* b) Air damping
* c) Ambient temperature
* d) Operating temperature

Answer - c

23. The purpose of a method statement is to

* a) Ensure compliance with BS 7671
* b) Identify a safe working practice
* c) Provide a training document for staff
* d) Provide instructions to be followed at all times

Answer - b

24. Electrostatic sensitive equipment, in transit, need not be protected against damage from

* a) High temperature
* b) Dust and fibers
* c) Moisture ingress
* d) Day light

Answer - d

25. To facilitate ease of installation and assembly of equipment reference is made to

* a) BS 7430
* b) Manufacturer's catalogues
* c) GS 38
* d) Data charts

Answer - d

26. When a voltmeter is connected in a circuit it is essential that it

* a) Has a very low resistance
* b) Has a very high resistance
* c) Is connected in series with the supply
* d) Is connected in series with the load

Answer - b

27. When an ammeter is connected in a circuit it is essential that it

* a) Has a very low resistance
* b) Has a very high resistance
* c) Is connected across the supply
* d) Is connected across the load

Answer - a

28. Which of the following has an impact upon earthing?

* a) BS EN 60439-01
* b) BS 4491
* c) BS 4444
* d) BS EN 60898

Answer - c

29. Which of the following is a statutory piece of legislation?

* a) BS 7671
* b) IEE Guidance Notes
* c) Electricity at Work Regulations
* d) IEE On-Site Guide

Answer - c

30. Which of the following lamps would not normally form part of a highway electrical system?

* a) Low pressure mercury (T8-T12)
* b) Low pressure mercury (MBF)
* c) Metal halide (MBI)
* d) Incandescent Lamp (100W)

Answer - d

31. Which legislation states the need to avoid live working unless unreasonable in all circumstances?

* a) BS 7671
* b) Guidance Notes 3
* c) On-Site Guide
* d) The Electricity at Work Regulations

Answer - d

32. To facilitate safe isolation, voltage indicating devices

* a) Must comply with BS 7671
* b) Are used to prove the circuit was dead only
* c) Are used to prove the circuit was alive only
* d) Are “proved” prior to and “re-proved” after isolation

Answer - d

33. Instruments should be regularly calibrated to

* a) Support local industry
* b) Ensure accuracy when testing
* c) Ensure operative is up to date
* d) Provide a training exercise for operatives

Answer - b

34. Relevant information for re commissioning street furniture can be found in

* a) IEE Guidance Notes 7
* b) Works instructions
* c) The Electricity Supply Regulations
* d) The Petroleum (Consolidation) Act 1928

Answer - b

35. Voltage indication devices need to be proved to ensure

* a) That the lamp has not gone
* b) That the highway furniture has been installed correctly
* c) Safe working conditions
* d) The correct operation of street furniture

Answer - c