Once concrete is placed, curbing forms are removed after _____
a. 8 hours
b. 16 hours
c. 24 hours
d. 48 hours
c
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Fractionation occurs when ____.
A. some of a blended refrigerant evaporates or condenses before the rest of the blend B. when only a fraction of the total charge has been added to a system C. the operating pressures of a system increase D. Both a and c.
Which of the following statements is the most accurate when describing the replacement of an OEM (original equipment manufacturer) relay with an electronic relay:
a. Either one is OK as long as the compressor starts and runs. b. Electronic relays are just as good as the OEM relay, they just cost more. c. The OEM relay is a more accurate starting relay than the electronic relay.
Grinding wheel dressing is done to:
A) Prepare the wheel for form grinding B) Sharpen the grinding wheel C) Make the grinding wheel concentric to the spindle D) Prevent slippage between the wheel and spindle
Some control components, such as limit switches, photodetectors, or flow switches, may be located on the machine itself, while other components such as control relays and motor starters may be located inside a cabinet.
Answer the following statement true (T) or false (F)