What is a safety lockout?
What will be an ideal response?
If the trial for ignition fails, then the first main valve operator de-energizes and closes flow to the pilot burner, stopping gas flow. The ignition process may repeat several times before lockout occurs. Depending on the manufacturer's setup, lockout may automatically reset after an hour or more or it may have to be reset manually. Both the automatic and manual ignition lockouts can be reset manually by turning the power off for a few seconds, then powering up again.
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A ground fault is described as an unintentional _____.
a. connection between two or more portions of the equipment grounding conductor b. open connection between an electrical circuit or equipment and the earth c. conducting connection between any of the conductors of an electrical system d. electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors
Another name for the stop-start feature is ____.
A. go-stop B. on-off C. idle-stop D. neutral-start
Compute the effective file entropy Hf (xx.x bits) of the file that contains the following symbol sequence
What will be an ideal response?
There are four styles of HID lamps: ____, metal halide, high-pressure sodium, and low-pressure sodium.
A. halogen B. lithium C. mercury D. tungsten