Systems with fixed-restriction metering devices are critical to charge because:
A) You must weight both the system and the refrigerant.
B) They can only be charged one time.
C) The large liquid receivers hold so much refrigerant.
D) The expansion device cannot adjust to changing conditions.
D
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Technician A says that EHI pressure at the beginning of an injection pulse should be closely equivalent to rail pressure. Technician B says that EHI pressure at the end of an injection pulse will have dropped off significantly. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Name three causes of leakage in valves.
What will be an ideal response?
A(n) ____ is required with parts that are to be forced together as a single unit.
A. negative clearance B. positive clearance C. negative fit D. positive fit
A certain electronic test circuit produced a resonant curve with half-power points at 432 Hz and 454 Hz. If Q = 20, what is the resonant frequency of the circuit?
What will be an ideal response?