In fire departments that have access to multiple radio channels, emergency operations should be:
A. continued on primary frequency only
B. run by cell phone so the radio is not tied up
C. assigned a separate channel dedicated for use on that scene only
D. transferred to another agency
Answer: C. assigned a separate channel dedicated for use on that scene only
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Cloud-to-Earth lightning strokes are most likely to occur ____.
A. in urban areas B. at a high point C. in valleys D. in rural areas
Technician A says the only time an ammeter is used for testing is when the power for the circuit is disconnected. Technician B says when testing a circuit, the ammeter is always connected in series with the circuit. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
Which of the following is NOT a feature of ControlNet network?
A) ControlNet is a sub-network off the DeviceNet network. B) PLCs use ControlNet scanner cards when added to the network. C) Devices attached to the network include operator interface terminals, remote I/O modules, motor drives and personal computers. D) Both coaxial and fiber optic cables are used to transmit data on the network.
If the compressor will not operate in the cooling mode, the best thing to do is _____
a. immediately replace the compressor b. make sure the compressor is getting voltage c. see if the compressor runs in other modes d. check the refrigerant charge