The vacuum level on a system being evacuated pulls down to 2,000 microns, but goes no lower even as the vacuum pump continues to run. This indicates:
A) That the system is charged with the wrong type of refrigerant.
B) That the vacuum is complete.
C) The presence of water in the system.
D) That the refrigeration oil is incompatible with the refrigerant in the system.
C
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a. absorption b. injection c. luminous d. power
Smog is ________
A) Ozone B) Carbon monoxide (CO) C) Carbon dioxide (CO2 ) D) Nitrogen (N)
Which of the following would contribute most to the possibility that a rig could tip over during a turn?
A. cargo that is stacked very high B. cargo that is in liquid form C. cargo that is packed very tightly D. no cargo
Describe the common characteristics of several methods of checking material hardness.
What will be an ideal response?