Valves that open and close rapidly under the control of electronic circuits are:

A) Step motor valves. B) Pulse-modulated valves.
C) Electronic expansion valves. D) Cross-charged expansion valves.


B

Trades & Technology

You might also like to view...

What is the minimum efficiency of a fossil fuel–burning furnace?

What will be an ideal response?

Trades & Technology

Each computer is connected to the data bus is called a mole.

Answer the following statement true (T) or false (F)

Trades & Technology

What causes drum threading?

A. Excessive heat B. Worn shoes or springs C. Improper brake lathe use D. Tight shoe adjustment

Trades & Technology

A pulse-waveform to DC convertor makes use of an integrator:

A) with a time constant shorter than the width of the input pulse. B) with a time constant much wider than the width of the input pulse. C) with an extremely large time constant. D) either B or C

Trades & Technology