What is a bi-flow expansion valve?
What will be an ideal response?
A bi-flow expansion valve is designed to allow refrigerant flow in both directions. Some bi-flow valves meter the refrigerant in both directions while others allow unrestricted flow in the reverse direction.
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Local fire codes must be consulted when framing an opening around a chimney to establish _____.
a. correct pitch b. rafter spacing c. proper clearance d. insulation requirements
_______________ protection is found on only small motors, and is designed so that the motor will not burn out under locked rotor conditions.
Fill in the blank(s) with the appropriate word(s).
How can you tell the difference between a scale insect and a mealybug?
What will be an ideal response?
Technician A says that the intake valve runs hotter than the exhaust valve because the intake valve has the greater surface area. Technician B says that the exhaust valves usually do not burn due to the scavenging effect of the exhaust stream. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B