What is cooling tower fill material?
What will be an ideal response?
This material is usually constructed of plastic or wood shells. The fill is much like a honeycomb found in a bee's nest and slows the fall of the water and increases its surface exposure.
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The purpose of contactor 2M shown in Figure 3 is to _____.
a. short motor leads T4, T5, and T6 during starting to connect motor windings in a wye configuration b. energize motor leads T1, T2, and T3 for both wye and delta connections c. energize motor leads T4, T5, and T6 during running to connect the motor windings in a delta configuration d. connect resistors in series with the motor windings during the transition from start to run
In which of the following applications would fiberglass duct not be acceptable?
a. Kitchen exhaust ducts b. Supply air ducts for an oil-fired furnace c. Supply air ducts for a gas-fired furnace d. Vertical risers in a single-story home
In the United States, liquid volume is measured in:
A) Ounces, cups, pints, quarts, gallons. B) Square inches and square feet. C) Milliliters and liters. D) Ounces, pounds, gross, kilo.
What makes a FET an excellent first stage amplifier?
A) low noise B) very low input impedance C) very high input impedance D) both a and c