Author Question: The three essential requirements for a useful electric circuit are: A) A power source, a magnetic ... (Read 88 times)

NguyenJ · **on:** Jul 24, 2018

The three essential requirements for a useful electric circuit are:

A) A power source, a magnetic field, and a path for current flow.
B) A magnetic field, a path for current flow, and a switch.
C) A power source, a path for current flow, and a switch.
D) A power source, a path for current flow, and an electrical load.

Question 2

A refrigeration system dataplate states that the low-side test pressure is 150 psig. This means that:

A) The low side should not be pressurized above 150 psig.
B) The low-side pressure should be 150 psig when the system is running its self-test.
C) The low side should operate with a pressure of 150 psig at all times.
D) The low-side pressure will be 150 psig when the system is operating at design conditions.