Technician A says cryogenic reefers units have a heavy carbon footprint and ODP rating. Technician B says that R-22 has been approved for use in refrigerated trailers until the year 2020. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: B
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?Not until the development of ____ was it possible to create a material that rivaled nature in a factory.
A. ?vulcanized rubber B. ?Bakelite C. ?celluloid D. ?nylon
The term oxyfuel refers to the combination of acetylene and a combustible fuel gas to produce a flame
Indicate whether the statement is true or false.
When performing dynamic balance of a truck driveshaft using counterweights and a hose clamp, where should the hoseclamp worm be positioned when testing?
A. 180 degrees offset from counterweight B. 90 degrees offset from counterweight C. over the counterweight D. it does not matter
_____ is the ability of a pipe to be bent or formed without cracking or breaking.? ?
A. Hardness? B. Ductility? C. Brittleness? D. Toughness?