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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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
Two circles having different size radii but having the same center point are said to be eccentric circles
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