What can be used to maintain the head pressure of a system with a water-cooled condenser?
A. Fan cycling.
B. Dampers or louvers.
C. Water regulating valve.
D. All of the above.
Answer: C
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When erecting a gable roof, which portion of the rafter is nailed to the ridgeboard?
a. the bird's mouth b. the plumb cut c. the tail cut d. the seat cut
Improper combustion can lead to ____.
A. excessive carbon monoxide production B. smoke condition around furnace C. wasted fuel oil D. All of the above.
The cabin filter can be accessed from ________
A) Under the dash on some vehicles B) Under the hood on some vehicles C) Under the vehicle on some vehicles D) Either A or B
A series RC circuit contains two resistors and two capacitors. The resistors are 39 ? and 68 ?. The capacitors have capacitive reactances of 60 ? and 50 ?. The applied voltage is 240 V. What is the voltage drop on the capacitor that has 50 ? of reactance?
A. 93.84 V B. 106.35 V C. 178.2 V D. 260.99 V