For laboratory/factory tests that require a representative cable section while remaining practical to handle, a normal sample length is in the range of about 50 cm to 10 m, matching the keyed option.
Formula / Key Relation
Typical laboratory cable specimen: order of metres, not hundreds of metres.
Detailed Explanation
Concept & ReasoningCable test standards use different specimen lengths depending on the exact electrical, mechanical or ageing test. The broad exam range in this question reflects a practical sample long enough to include the complete insulation/sheath construction and terminations while still fitting a laboratory test arrangement. Very short pieces may be unsuitable for some HV tests; very long lengths belong to installed-cable testing rather than ordinary samples.How to Solve It in the ExamSample test piece → think manageable laboratory length.Important Exam PointDo not generalize this broad range to every IEC/IS test; specific standards can prescribe exact dimensions.Related Revision PathThis question…
Concept & Reasoning
Cable test standards use different specimen lengths depending on the exact electrical, mechanical or ageing test. The broad exam range in this question reflects a practical sample long enough to include the complete insulation/sheath construction and terminations while still fitting a laboratory test arrangement. Very short pieces may be unsuitable for some HV tests; very long lengths belong to installed-cable testing rather than ordinary samples.
How to Solve It in the Exam
Sample test piece → think manageable laboratory length.
Important Exam Point
Do not generalize this broad range to every IEC/IS test; specific standards can prescribe exact dimensions.
Related Revision Path
This question sits in the revision path Power System → High Voltage Engineering → Cable Testing .
Quick Trick
Sample test piece → think manageable laboratory length.
Common Mistake
Choosing above 100 m as though a factory sample were an installed feeder length.
Exam Tip
Do not generalize this broad range to every IEC/IS test; specific standards can prescribe exact dimensions.
SEO + Knowledge GraphRelated PYQs & Exam ContextExam path, knowledge path and deeper practice links.
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 231
