Which of the following accurately describes the function of the fusible plug used in an A/C system?
A. provides a measure of fire safety in the event of an underhood fire
B. melts and releases engine coolant if temperature exceeds 245 degrees Fahrenheit
C. melts and releases refrigerant if temperature exceeds 230 degrees Fahrenheit
D. provides a measure of explosion protection when ambient temperatures climb to 115° F
Answer: C
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Backlash is normally ________.
A) 0.008 -0.012 inch (0.2-0.3 mm) B) 0.100 -0.120 inch (2.5-3.0 mm) C) Less than 0.008 inch (0.2 mm) D) 0.012-0.020 inch (0.3-0.5 mm)
Designers and contractors should always use the common names of plants to
avoid confusion in finding them.
Indicate whether the statement is true or false.Ball valves for refrigerant piping are used for larger applications and come in sizes up to about ____________________.
Fill in the blank(s) with the appropriate word(s).
Overcurrent protection devices must be readily accessible.
a. True b. False