What type of antifreeze solutions may be used in ground loops?
A) Any antifreeze that will extend the freezing point down to -35°F
B) Preferably ethylene glycol
C) A brightly colored antifreeze solution should be used to make it visible in ground water.
D) Low toxicity
D
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Referring to the figure shown below, technician A says that a shorted to ground circuit 90L between the differential pressure switch and the flow switch will cause the pump motor to run even though both the differential pressure and flow switches are open. Assuming fuse F33 is supplied with unswitched battery positive voltage and that the flow switch is normally closed, technician B says that closing the hydraulic brake switch (50) with ignition off should cause the pump motor to operate. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
A cyclic heat engine produces 10 kW of power while receiving 25 kW of heat as an input. Determine the heat rejection rate to the cool space, and the thermal efficiency of the heat engine.
Given: W?=10 kW; Q?H=25 kW Assume: The heat engine is operating as a cycle. What will be an ideal response?
Calculate the current gain i?/is in the circuit of Fig. 3.105.
 FIGURE 1.png)
Gas tungsten welding is sometimes called?
What will be an ideal response?