AC concentrates about ____ of its welding heat on the work and ____ on the tungsten.
A. 2/3, 1/3
B. 1/3, 2/3
C. 1/2, 1/2
D. 1/4, 3/4
Answer: C
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_____ further defines the manufacturing process and chemical composition that give each grade its unique process.? ?
A. Pipe grade? B. Mechanical property? C. Pipe standard? D. Yield point?
If you see the sight glass bubbling should you add refrigerant? Why or why not?
a. No, the system may have just started or there may be a low load. b. No, wait until the bubbles stop before adding refrigerant. c. Yes, bubbles always mean the system is low on charge. d. Yes, when in doubt you should always add refrigerant.
In a single-zone constant-volume system, which floors only have provisions for cooling?
A) ground floors B) intermediate floors C) every floor D) below ground floors
What is a SIS?
A. Manual revisions available from the manufacturers website. B. Online training system use by several manufacturers. C. Manufacturer's internet based service information system. D. Sensor In Sensor technology that simplifies engine electronics.