What are the advantages of attic ventilation in warm climates?
What will be an ideal response?
The air space in an attic is between the deck above and the insulation below, i.e., the air space is not insulated from sun's heat. An unventilated attic, therefore, stores heated air which is transferred to the interior through attic insulation. The temperature of an unvented attic air can be several degrees higher than that of a vented attic.
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A solid-state phase monitoring relay provides protection in the event of a(n) ____.
a. power failure b. power brownout c. phase reversal d. abrupt startup
What is the difference between a tool with external grounding and a double-insulated tool?
What will be an ideal response?
If a fail relay coil ceases to function, which of the following will result?
A. ABS does not function, ABS warning light does not illuminate B. ABS does not function, ABS warning light illuminates C. service brakes cannot be applied D. parking brakes cannot be released
A three-phase alternator containing six poles is turning at 1000 RPM. What is the output frequency?
A. 30 Hz B. 40 Hz C. 50 Hz D. 60 Hz