17th Edition Mock Paper

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17TH Edition , Questions & Answers for Examination 2382-10 Requirements for Electrical Installations

1. The external influence code ACM requires IP rated equipment to

a. IPX4

b. IPX1

c. IPO

d. IPX2

2. AS 7671 is a

a. document designed solely for the use of electricians

I. legal document used in a court of law

c. Bon statutory document

d. statutory document

3. The fundamental principles of BS7671 state that persons and livestock shall be protected against injury as a

consequence of over voltages originating from

a. motors running

I. the operation of circuit breakers

c. atmospheric events

d. voltage recovery

4. The fundamental principles of BS 7671 covering the protection against voltage disturbances etc., states that the

installation shall have an adequate level of immunity against

a. the weather

b. electromagnetic disturbances

c. voltage loss

d. vibration

5. What is the maximum As for a 10A type C circuit breaker protecting a standard discharge type lighting circuit?

a. 1.15 ohms

I. 2.30Ohms

c. 1.44Ohms

d. 1.92Ohms

6. A double insulated hand held electric drilling machine is known as

a. class II equipment

b. a DeWalt

c. class HI equipment

d. class I equipment

7. An electrical installation certificate should be signed by

a. the local authority

b. a competent person

c. the customer

d. the REC

8. When considering external influences, the code AD4 requires IP rated equipment to

a. IPXO

b. IPX1

c. IPX4

d. IPX5

9. The external influence code AD1 requires IP rated equipment to

a. IPX4

b. IPX1

c. IPXO

d. IPX2

10. When considering external influences, the code AA5 relates to the ambient temperature range

a. -5

 

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40. Where a generating set is used as an additional source of supply in parallel with other sources, it shall be instated

a. on the supply side of all the protective devices for the final circuits of the installation with a number of additional

requirements

b. on the supply side of all the protective devices for the final circuits of the installation with no additional requirements ~>

c. on the load side of all the protective devices for the final circuits of the installation with no additional requirements

d. on the load side of all the protective devices to the final circuit which must be connected by plug and socket

41. Regarding auxiliary supplies to safety services, the maximum changeover time refers to

a. how long the safety source can supply the rated power output to the safety service

b. the frequency (in cycles per second) of the auxiliary supply feeding the safety service

c. how often maintenance has to be carried out on the auxiliary supply

d. the time It takes for the safety source to supply the power to the safety service, after the loss of the main power supply

42. The minimum value of insulation resistance test performed on a PELV installation is

a. 10.0 MOhm

b. 2.0 MOhm

c. 0.3 MOhm

d. 0.5 MOhm

43. The minumum value of insulation resistance test performed on a SELV installation is

a. 99.0 MOhm

b. 2.0 MOhm

c. 0.3 MOhm

d. 0.5 MOhm

44. During the initial verification of an installation, which of the following forms part of the checklist?

a. maximum demand and diversity

b. Design briefs

c. contractors notes

d. presence of diagrams and instructions

45. An earth fault loop impedance test performed on a final ring circuit will record

a. the external loop impedance

b. the resistance of the line and protective conductors and external loop impedance

c. the resistance of the line and protective conductors

d. the protective conductor resistance

46. A polarity test would be conducted to verify

a. every fuse and single pole device is connected in the line conductor only -

b. there is sufficiently low resistance to operate the protective device within its limits

c. there is sufficient circuit protection

d. there is no breakdown of the conductor insulation

47. The minimum value of insulation resistance of a PELV circuit is

a. 0.5 MOhm

b. 1MOhm

c. 1.5 MOhm

d. 5MOhm

48. Within an agricultural installation, bonding conductors can be

a. 6.0mm2 aluminium conductors

b. 4.0mm2 aluminium conductors

c. 4.0mm2 copper conductors

d. 5.0mm2 copper conductors

49. Self supported suspension cables within agricultural situations should be

a. at a height of a least 2m

b. at a height of a least 4m

c. at a height of a least 6m

d. at a height of a least 10m

50. If SELV or PELV is used within agricultural premises, barriers or enclosures must conform to at least

a. IP4X

b. IPXXB

c. IPX4

d. IP67

51. Within zone 2 of an outdoor swimming baths where no water jets are used, installed electrical equipment should be rated

a. IPX4

b. IP2X

c. IPXXB

d. 1PX8

52. In an area containing a bath or a shower, socket outlets must be installed

a. 3m horizontally from zone 1

b. 3m horizontally from zone 0

c. 3m horizontally from zone 2

d. within zone 2 but outside zone 1

53. Where contact with skin or footwear is likely, the floor temperature of an underfloor heating installation should be limited to

a. 20