The pressure drop for R-22 due to vertical lift ina liquid line is approximately:
A) 0.2 psi per foot of lift. B) 0.5 psi per foot of lift.
C) 2 psi per foot of lift. D) 1 psi per foot of lift.
B
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Indicate whether the statement is true or false
When pressurizing a system for leak testing, the only refrigerant that can be used as a trace gas is _____
a. HFC-410A b. HFC-134a c. HFC-407C d. HCFC-22
A carnival ride properly powered through a disconnect switch within 6 feet (1.8 m) of the operator can also be opened from the operator’s console using a _____.
a. rheostat b. positive locking device c. shunt trip d. site-isolating device
A meter that uses a moving pointer or needle to indicate a value on a scale is called a(n) __________ meter.
a. LCD b. analog c. digital d. parallax