Adding chemicals to a solution tank should occur in the following sequence _____
a. any liquids, then any solids
b. any solids, then any liquids
c. chemicals first, then water
d. water first, then chemicals
d
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Elevator and stair shafts in building cores are often constructed by using a type of _____.
a. sliding form b. climbing form c. slip form d. jack-raised form
Technician Asays a diode can be tested with a DMM that has a diode test setting. Technician B says when testing a diode with a DMM that has a diode test setting the meter should read approximately 0.6V in one direction and 0 when the leads are reversed. Who is correct?
A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B
Why are liquid line filter-driers required for all systems using HFC refrigerant?
A) Because the filter-drier is also the metering device in newer systems B) Because the filter-drier also serves as a reservoir for refrigerant C) Because the POE oil used with HFC refrigerant is very hygroscopic D) Because HFC refrigerants often form fluoride crystals inside the system
Winter temperatures between ____°F and 77°F with RH levels ranging between 22% and 70% are generally considered to be comfortable for most people.
A. 58 B. 62 C. 65 D. 68