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Safety practice questions

25 questions from the hybrid and electric vehicles practice test.

Safety practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

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Sample questions

Why are leather protectors worn over rubber insulating gloves?

  1. To add to the glove's voltage rating
  2. To guard the rubber from cuts and punctures
  3. To keep the technician's hands dry and cool
  4. To let the gloves be used past their test date
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B. To guard the rubber from cuts and punctures

The rubber does the insulating; the leather only keeps sharp edges from cutting or puncturing it. The leather adds no voltage rating, so a damaged rubber glove under a good leather protector is still unsafe.

Reference: OSHA 29 CFR 1910.137(c); ASTM F496

What check must be done on rubber insulating gloves before every use?

  1. Send them out for a voltage proof test
  2. Look them over and air-test for leaks
  3. Wash them in solvent and let them dry
  4. Measure them with an ohmmeter cuff to tip
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B. Look them over and air-test for leaks

Each time, the technician inspects the gloves and rolls the cuff to trap air and find pinholes. The laboratory proof test is also required, but on a periodic schedule, not before each job.

Reference: OSHA 29 CFR 1910.137(c)(2)(ii)

Under OSHA rules, how often must rubber insulating gloves that are in service be electrically retested?

  1. Every 12 months
  2. Every 24 months
  3. Only after damage
  4. Every 6 months
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D. Every 6 months

Gloves are tested before first issue and every 6 months after that. Twelve months is the interval for some other insulating equipment such as sleeves and blankets, which is why it is often picked by mistake.

Reference: OSHA 29 CFR 1910.137, Table I-5

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