____ can be used to back any type of pipe if a welder is unsure about a less expensive substitution.
A. Nitrogen
B. Carbon dioxide
C. Oxygen
D. Argon
Answer: D
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Which of the following is true of martensite?
A. It is the weakest of the transformation products of austenite. B. As formed, it is very hard and brittle. C. As formed, it is extremely useful in most engineering applications. D. Martensite cannot be tempered.
What products does a mass market shop usually offer? Name two
What will be an ideal response?
Technician A says that a vehicle may have stored DTCs even if the MIL is not illuminated. Technician B says that all DTCs will illuminate the MIL. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
When working in a confined space where concentrations of harmful substances are very high, why should atmosphere-supplying respirators be worn?
A) To supply clean breathing air from a compressed air source B) To enable asphyxiation to occur in a very short time C) To circulate odorless, tasteless, invisible refrigerants D) To purify air of harmful dust, mist, metal, fumes, and vapors