____ agents are added to concrete or grout to cause a slight expansion in it before it hardens.
A. Gas-forming
B. Grouting
C. Hardening
D. Bonding
Answer: A
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The rule for segmental arch construction is that the minimum rise should always be _____ the width of the opening or span, if the arch is to be self supporting and not on a form.
A. equal to one-eighth B. more than one-fourth C. up to one-half D. no more than one-sixteenth
Which of these is not an important consideration in refrigerant piping design?
A) Friction losses, which reduce compressor capacity. B) Height of compressor with respect to cooling coils. C) Velocity to move oil in the suction line. D) Thermal expansion of the hot gas line.
Examples of PGRs that contain ethylene are Ethrel®, Florel®, and ProGibb®
Indicate whether the statement is true or false
Demand on Central Supply tends to be:
A) continuous. B) monotonous. C) lower than the Distribution Centers. D) lumpy. E) smoothed out with planned orders.