Classrep2

During an annual service check up, it is discovered that there is a moderate amount of resistance on a "bellyband" crankcase heater. What does this condition indicate? A. the crankcase heater will operate B. the crankcase heater will not operate C. the crankcase heater is open D. the crankcase heater voltage must be increased for proper operation - ANSWERA. the crankcase heater will operate High superheat is a symptom of: A. a system overcharge B. a clogged air filter C. a bl...

A technician has determined a supply in a flexible duct system is leaking. What should be checked? - ANSWERAll connections inner and outer layers. Electronic air cleaners can operate with internal voltages as high as? - ANSWER5000v Why do some electromechanical type thermostats require connections to both the hot side and common side of the low voltage transfromer - ANSWERDisplay lights must be powered using both sides of the line the continuity reading on a functional fuse will be - AN...

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 - ANSWERd) very important Ch. 1-2 It is important to be _______ in filling out service orders so that office staff, other technicians, and customers will know what work you completed on the job. a) clear b) complete c) concise d) all of the above - ANSWERd) all of the abov...

A suction line accumulator should be used in a residential heating pump only when recommended by the manufacturer if: a. Long refrigerant lines increase system charge over recommended maximum charge b. added oil dilution is required to maintain proper lubrication c. the system has low vapor line pressure drop and accumulator is added to improve efficiency d. the system does not include a high pressure switch or time delay - ANSWERA. Long refrigerant lines increase system charge ove...

The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the: - ANSWERcompressor The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the: - ANSWERcondenser The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the: - ANSWERevaporator A split-system air conditioning unit has: - ANSWERthe compre...

A system is supplied from the factory with a 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 charge for the system? A. 6 ounces B. 5 pounds C. 5 pounds 10 ounces D. 6 pounds - ANSWERD. 6 pounds 25ft - 15ft = 10ft 10ft x .6 = 6 ounces 5 pounds + 10 ounces + 6 ounces 5 pounds + 16...

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 - ANSWERA: Liquid flood-back to the compressor Which of the following is the correct sequence of work? A: Attach gauge manifold, recover refrigerant, replace filter core, evacuate the system, recharge the system. B: Recover refrigerant, ev...

A good evacuation of a refrigerant circuit to remove non-condensables will help insure: A.) higher condensing temperatures B.) higher suction pressures C.) low suction line pressure drop D.) higher efficiency and capacity - ANSWERD.) higher efficiency and capacity A condensing unit should be mounted on a slab that is level to: A.) allow an 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 certai...

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 charge for the system? A. 6 ounces B. 5 pounds C. 5 pounds 10 ounces D. 6 pounds - ANSWERD. 6 pounds 15ft - 25ft = 10ft x .6 = 6 ounces 5 pounds + 10 ounces + 6 ounces 5 pounds + 16 ounces =...

Which of the following behaviors in the workplace should the nurse recognize are consistent with substance use disorder? - ANSWERextended lunch periods and breaks calling in sick frequently on mondays or fridays decrease in concern about personal appearance and grooming excessive use of cologne or mouthwash a nurse manager establishes staff nurse committees to address unit issues, institutes an open-door policy for speaking about concerns, and supports the professional development of the ...