2 Answers

A short chain is sometimes attached to the back of a petrol tanker to…

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PHYSICS

A short chain is sometimes attached to the back of a petrol tanker to

A. Conduct excess charges to the earth

B. Ensure the balancing of the tanker

C. Caution the driver when over speeding

D. Generate more friction

QUICK ANSWER…

A

DETAILS…

As the air surrounding a travelling petrol tanker rubs and creates friction with the walls of the tank, charges could be accumulated. Now a chain is usually attached to the back of the tanker in order to conduct and discharge any risky excess charges to the earth.

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Now for the right answer to the above question:

  1. Option A is correct.
  2. Option B is incorrect. not for balance.
  3. C is incorrect. wrong. not to prevent over speeding.
  4. D is not the correct answer. unreasonable option.

KEY-POINTS…

You may please note these/this:

  • Accumulated charges could cause explosive hazards, this is why there is need to earth them through the dangling chains.

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/ culled from 2015 JAMB-UTME physics question 34 /

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