MCQ: Wiring systems

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MCQ: Wiring systems
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CompEx questions are organised into topic-based sets including Ex d, Ex e, Ex n and intrinsic safety. Select a subject to study at your own pace or complete a timed practice attempt.

“CompEx — MCQ: Wiring systems” contains 13 questions across 1 collection.

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3) Separation of the strands of cable cores may be prevented by?

One correct answer

(I) Soldering or fitting core lugs;
(II) Twisting the strands;
(III) Fitting cable lugs or core-end sleeves;✓ Correct answer
(IV) Soldering the strands.

4) A cable gland marked with a suffix ‘X’ may only be used with?

One correct answer

(I) Portable equipment with additional clamping of the cable;
(II) Fixed equipment with additional clamping of the cable;✓ Correct answer
(III) An enclosure also marked with a suffix ‘X’;
(IV) Fixed equipment.

1) The minimum cross-sectional area for aluminium conductors of cables (except IS cables) used in hazardous areas should hot be less than?

One correct answer

(I) 25mm;
(II) 16mm;✓ Correct answer
(III) 10mm;
(IV) 6mm

12) Before work is carried out in an hazardous location which one of the following is necessary to understand?

One correct answer

(I) The manufacturer’s documentation;
(II) The basic requirements for working in the zones of hazardous areas✓ Correct answer
(III) Circuit diagrams for panel wiring;
(IV) How the equipment operates;

10) Which one of the following statements represents the assessment requirements for technicians as given in BS EN60079-14 :

One correct answer

(I) A degree in electrical engineering;
(II)Evidence only of having the necessary skills for the scope of work;
(III) Evidence only of having the necessary skills for the scope of work and competence across the range activities
(IV) Evidence indicating the necessary skills for the scope of work, competence across the range of activities and relevant knowledge and understanding✓ Correct answer

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