Which of the following refrigerant safety designations indicate the refrigerant is highly flammable?
A) A2 B) A1 C) B1 D) B3
D
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The fire properties that determine the class of interior finishes are
A) fire -resistance rating and FSI. B) fire -resistance rating and SDI. C) FSI and SDI. D) fire -resistance rating, FSI, and SDI.
Technician A says, when using an air ratchet, the trigger should be depressed until the tool stalls out and then finish tightening the fastener by hand. Technician B says the tool rest on the bench grinder should be adjusted to within 1/8 inch of the grinding wheel. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
A wood light-frame building is essentially a
A) load-bearing-wall structure. B) frame structure.
Falls from an elevation _____.
a. usually result from tripping and slipping b. are almost never fatal c. seldom cause serious injury d. are almost always fatal