Technician A says that a dry chemical fire extinguisher can be used on class A, B and C fires. Technician B says that the chemical used in these fire extinguishers can be corrosive. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B
B) Technician B only
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The first number in the AISI-SAE classification system indicates the ____.
A. nominal percentage of the alloying component B. basic type of steel C. actual percentage of carbon content D. nominal percentage of carbon content
What should be used to align the cylinder heads on engine with multiple heads before torquing the cylinder head bolts?
A. machinist's straight edge B. dial indicator C. plastigage D. depth micrometer
The circuit breaker that protects a power window circuit opens whenever the window is lowered. Technician A says the internal resistance of the motor is too high. Technician B says the window regulator may be sticking. Who is correct?
A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B
How do evaporators in medium-temperature refrigeration cases normally defrost?
A) The case air circulates over the coil while the compressor is off. B) Electric heaters built into the evaporator coil C) Hot gas is bypassed around the condenser straight into the evaporator. D) Small defrost gas burners