To close a control circuit and start a system, a remote-bulb thermostat depends on a _____.
a. bimetal strip that expands or contracts
b. refrigerant-filled bulb that responds to temperature changes
c. mercury-filled bulb that responds to temperature changes
d. thermocouple that changes its resistance as the temperature changes
b. refrigerant-filled bulb that responds to temperature changes
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If the relative humidity of air at 55°F (13°C) is 65%, which of the following temperatures is a possible dew point?
a. 43°F (6°C) b. 55°F (13°C) c. 85°F (29°C) d. 100°F (38°C)
Answer the following statement(s) true (T) or false (F)
1. Good conductors have many free electrons in their structure. 2. Once charged, a capacitor can remain charged forever. 3. Any inductance coil is really a combination of inductance and resistance in series. 4. All capacitor manufacturers use a standard set of color codes. 5. A positive temperature coefficient indicates that the capacitance will decrease with an increase in temperature.
All op amps use bipolar transistors for input.
Answer the following statement true (T) or false (F)
What application of heat exchangers is used to supply the necessary column heat?
A) Reboiler B) Preheater C) Chiller D) Condenser