The National Comfort Institute recently reported that approximately __________of air conditioning systems are operating at less than maximum efficiency

A. 10%
B. 45%
C. 57%
D. 70%


Answer: C

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?The same principles are used in reading and setting metric vernier calipers as are used for ___________ vernier calipers.

What will be an ideal response?

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For outdoor electric de-icing installations, branch circuits and overcurrent devices supplying the equipment shall be sized at not less than what percentage of the total heater load?

a. 80% b. 100% c. 125% d. 150%

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Which of the following statements is LEAST-Likely true?

A. Maintenance-free batteries have cell plates made of a slightly different material. B. Instead of the antimony used in conventional batteries, calcium or strontium is used to strengthen the plate grids. C. When overcharged, calcium will only use 1/3 of the water that antimony does. D. If the voltage regulator allows the alternator to overcharge the battery, the water level will increase.

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The pitch of a roof is usually given as the number of inches of rise per ____ of run.

A. centimeter B. inch C. foot D. meter

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