What effect does slowing down the blower speed have on a heating unit?
A) It causes return-air temperature to increase. B) It does not affect the unit temperature.
C) It decreases the air temperature rise. D) It increases the air temperature rise.
D
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Most of the crops grown in the United States are produced using _____
a. Insecticides c. herbicides b. commercial fertilizers d. all of the above
Trace the history of the currency question in American politics from the aftermath of the Civil War to the passage of the Gold Standard Act.
What will be an ideal response?
What type of service valves are used with R-134a?
A) Quick disconnect valves B) Gate valves C) Saddle valves D) Schrader valves
A refrigeration system dataplate states that the low-side test pressure is 150 psig. This means that:
A) The low-side pressure should be 150 psig when the system is running its self-test. B) The low-side pressure will be 150 psig when the system is operating at design conditions. C) The low side should operate with a pressure of 150 psig at all times. D) The low side should not be pressurized above 150 psig.