Which of the following refrigerant piping techniques help to get oil to flow up a riser in a suction line?
A) Selecting a line size that results in a very low velocity.
B) Selecting a line size that is one or two sizes larger than the rest of the line.
C) Installing a trap at the bottom of the riser.
D) Installing a liquid-to-suction heat exchanger
Answer: C
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Which of the following statements is LEAST-Likely true?
A. Some shock absorbers are electronically controlled to provide a ride that is more firm or more soft than normal. B. Prior to doing a wheel alignment, the vehicle must be set at regular curb height. C. When using a hydraulic jack to lift a vehicle, lift by the front crossmember and manufacturer's specified rear lift points in front of the rear tires. D. When raising a vehicle with an electronically controlled air suspension, most manufacturers do not recommend a frame-contact hoist.
Which of the following statements is LEAST-Likely true?
A. Scuffing on only one skirt is rarely caused by excessive idling. B. Four-corner scuffing occurs when both skirts are scuffed on the edges next to the piston pin. C. A piston that overheats because of cooling system problems or abnormal combustion will expand excessively near the piston pin. D. Scuffing on both skirts is usually caused by insufficient clearance between new pistons and remachined cylinder walls.
Technician A says that a road test should never be performed before service, for safety reasons. Technician B says that the purpose of any diagnosis is to eliminate known good components. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
What are the other three resistor values if the MSB resistor of a binary-weighted resistor DAC is 3 k??
A) 6 k?, 12 k?, and 18 k? B) 6 k?, 12 k?, and 24 k? C) 1.5 k?, 750 ?, and 375 ? D) 6 k?, 9 k?, and 12 k?