Why is lead pipe no longer used today?
A. It expands too much.
B. It is too heavy.
C. It breaks too easily.
D. It is toxic.
Answer: D
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Thermostat has some small switches in the back that are called ____________________ switches that allow the technician to set this thermostat up for the particular piece of equipment that it is controlling.
Fill in the blank(s) with the appropriate word(s).
Heat-treatable low-alloy steels:
A) Are supplied in the annealed state B) Require low-hydrogen electrode welding procedures C) Require controlled interpass temperatures and cooling rates D) All of the above
What happens when the electrical contacts close in the motorized valve?
A) The bypass pump stops. B) The circulator pump starts. C) The bypass pump starts. D) The circulator pump stops.
The following mating feature(s) is (are) used as fixed fasteners:
A. screws B. nuts C. bolts D. rivets E. a and c