Proper height above the roof is important when installing a heat pump rooftop unit:
A) To allow the condenser to take advantage of local prevailing wind.
B) To ensure adequate combustion air to the burners.
C) So that the unit can be serviced from underneath.
D) So that snow does not block airflow through the outdoor coil.
D
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Cord-and-plug-connected lighting fixture assemblies for storage pools are permitted as long as the lamp operates at no more than __________ .
a. the low-voltage contact limit b. 24 volts c. 120 volts d. 150 volts
Which of the following is true regarding an oblique drawing?
A. easier to draw than perspective drawings B. most commonly used of pictorial drawings C. angles are true size D. both a and b
Refrigerant in liquid form is normally put into the system through the ____.
A. liquid line B. suction line C. hot gas line D. liquid return line
A driver of a vehicle equipped with a rack and pinion steering gear complains that the steering wheel jerks whenever the vehicle is being driven into a curbed driveway. Technician A says that the rack and pinion gears may have too little clearance between the teeth of the gears. Technician B says that a lack of lubrication of the rack and pinion is the most likely cause. Which technician is
correct? A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B