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
C
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¿Cuál es la altura de un puntal cuando un edificio tiene un techo interior de tablaroca de 1 /2" (1.3 cm), una base del piso de 5 /8" (1.6 cm), un contrapiso de 3 /4" (1.9 cm) y una altura de techo interior de 8' (2.4 m)?
a. 911 ?4" (2.317 m) b. 923 ?4" (2.355 m) c. 925 ?8" (2.352 m) d. 93" (2.362 m)
The maximum number of binary states in which a counter can exist depends on the number of flip-flops in the counter. This can be expressed as ____.
A. N = 2n B. N = 2n+ 1 C. N = 2n + 1 D. N = 2n - 1
A high-efficiency particulate air filter (HEPA) removes the smallest particulates from the air.
Answer the following statement true (T) or false (F)
Professional painters may not use as much masking tape as less experienced painters because ________
A) They can trim a straight line along edges where the paint stops B) They completely cover the interior of the room they are painting with plastic sheets C) They only use rollers and never use brushes D) They use more drop cloths