A meter is set to read DC volts on the 4-volt scale. The meter leads are connected at a 12-volt battery. The display will read ___________
A) OL B) 0.012V C) 12V D) 0.00
A
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An HPR valve (head pressure regulating valve) maintains head pressure by _______.
a. Flooding the condenser by backing up refrigerant in the condenser b. Lowering the subcooling to maintain head pressure c. Raising the subcooling to raise the head pressure d. Cycling the fans to maintain head pressure
Load moves along the three-hinged, parabolic arch ABC, shown in Figure P12.24. Construct the influence lines for the reactions at C, and shear, axial load and moment at point D. The equation for the parabolic arch is y = 4hx 2 /L 2 . If a point load P = 3 kips is applied at B, compute shear, axial load and moment at D.
What should you look for on the meter besides a CAT rating?
A) A DOE approval B) A certification from an independent laboratory C) An EPA approval D) An endorsement from a well-known technician
Which diagnostic step is the most important aspect of diagnosis?
A) Check the service bulletins B) Retrieve the trouble codes C) Verify the problem D) Visual inspection