Why do standard-design thermostatic expansion valves need a minimum pressure drop to operate correctly?
A) The internal adjustment springs have a minimum required torsion
B) The pressure difference across the pin acts as an opening force
C) The bulb will not sense temperatures below 100 psig
D) To ensure that the pin seats tightly during operation
B
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Fill in the blank(s) with the appropriate word(s).
The _____ covers the outer layer of the bone, cushions the hard portion of the bone, and aids in the repair of a broken bone
a. Periosteum c. Vascular cavity b. Red marrow d. Endosteum
What is the purpose of a flywheel diode?
What will be an ideal response?
Technician A says that water based fire extinguishers remove oxygen from the fire. Technician B says that CO2 fire extinguishers remove oxygen from the fire. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B