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Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above - d (All of the above: air movement, humidity, temperature) A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible cap...

An air conditioning technician is working in the basement of a large B37public building. The technician notices several unsafe and dangerous conditions. Of the following conditions that are noticed, which is the most dangerous and should be reported immediately? A: Gas leaking from a cracked pipe...

Ch. 1-1 The ability to utilize all types of communication skills is ________ to the HVACR technician. a) not as important as "hands-on" technical skills b) somewhat important c) unimportant d) very important - d) very important Ch. 1-2 It is important to be _______ in filling out service ord...

Low airflow over a residential split system air conditioning evaporator can cause A: Liquid flood-back to the compressor B: A decrease in compression ratio C: An increase in suction line superheat D: Oil logging in the evaporator - A: Liquid flood-back to the compressor Which of the following i...

d (very important) - - - - The ability to utilize all types of communication skills is ____ to the HVACR technician. a. not as important as "hands-on" technical skills b. somewhat important c. unimportant d. very important d (all of the above: clear, complete, concise) - - - - It is importan...

The Fahrenheit scale is based on boiling water at sea level at what temperature? A: 459 degrees B: 212 degrees C: 180 degrees D: 100 degrees - B: 212 degrees Zero pounds gauge corresponds on the absolute scale to: A: 144 B: 212 C: 14.7 D: zero - C: 14.7 Hidden heat in refrigeration work is...

With the condensing pressure and compressor speed remaining constant, a decrease in suction pressure will cause a(n): a. Decrease in compressor capacity and decrease in current. b. Increase in compressor capacity and decrease in current. c. Increase in compressor capacity and increase in current...

Calculate the air volume based upon these conditions: 90,000 BTUH output Return air temperature: 70F Supply air temperature: 110F a. 1,158 CFM b. 1,500 CFM c. 1,800 CFM d. 2,083 CFM - d (2,083 CFM) When measuring CFM using temperature rise method, the furnace blower motor speed should be in...

A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant c...

Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: A: 70% B: 75% C: 78% D: 80% - C: 78% Many pre-1992 furnaces have efficiencies around _______. A: 10% B: 40% C: 60% D: 80% - C: 60%

Charging a heat pump with refrigerant is best accomplished in the _______ mode. A: Heating mode B: Cooling mode C: Defrost mode D: Emergency heating mode - B: Cooling mode Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the heat pump more efficient...

On a new oil furnace installation, the oil pump pressure is found to be 50 PSI. which of the following actions should be taken? a. Increase the pump pressure. b. Add a new fuel filter. c. Reduce the pump pressure. d. No action needed. - A After installation and 20 min. of run time and oil furn...

A condensing unit should be mounted on a slab that is level to: A: Allow any accumulated water to evenly run out of the cabinet B: Increase airflow through the fin area C: Prevent the unit from tipping over D: Make certain any top discharge air blows straight up - A A simple time-activated swit...