What is the difference between exhaust air and ventilation air?
What will be an ideal response?
Exhaust air uses a fan to blow air out of a building; ventilation air uses a fan to blow air into a building.
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Dress the edge of a(n) ____ tip with a file or whetstone before removing the valve from the valve guide.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. When three single-phase coils are connected so that each coil is connected to the beginning of another coil, a simple open-delta system is formed. 2. Never complete the last connection if there is a voltage difference greater than zero. 3. In any closed-delta transformer connection, the line voltage and the voltage across the transformer windings are the same. 4. The high-phase situation can be a serious hazard to human life as well as to any 120-volt equipment connected improperly between the high phase and neutral. 5. A three-phase transformation of energy is not possible using only two transformers.
When a chain line is used to designate a datum, its length must be dimensioned.
Answer the following statement true (T) or false (F)
The function of the converter is to ____.
A. convert AC to DC B. convert DC to AC C. filter the DC D. filter the AC