With what must the nozzle spray pattern be compatible for proper mixing?
A) Burner air pattern B) Mix of oil and air C) Spray angle D) Orifice
[Ques. 2] Some codes limit refrigerant 410A to 25 pounds per 1000 cubic feet of space. This works out to 40 cubic feet per pound of refrigerant. The limit is lower, ________ cubic feet per pound of refrigerant for 24 hour care facilities such as hospitals and nursing homes.
A) 30 B) 50 C) 20 D) 15
[Ques. 3] What are the three most common ways to reduce pollutants in indoor air?
A) HEPA filters, electronic air cleaners, and UV lights
B) Source removal, ventilation, and filtration
C) HEPA filters, UV lights, and ozone generators
D) Creating a negative building pressure, filtration, and ventilation
[Ques. 4] The fuse protection for a piece of air-conditioning equipment should be sized using:
A) The locked rotor current of all the equipment motors added together.
B) The sum of the compressor RLA and the FLA of all fan motors.
C) The maximum overcurrent rating listed on the equipment data plate.
D) The minimum circuit ampacity listed on the equipment data plate.
[Ques. 5] For what applications are low-pressure refrigerants well suited?
A) Centrifugal chillers operating with 40F evaporators
B) Commercial refrigeration rack systems
C) Cryogenic equipment with reciprocating compressors
D) Residential air conditioning
Quick Reply
