Chain drives should be installed initially with about a _________ sag
A. 1%
B. 2%
C. 3%
D. 4%
B
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Fill in the blank(s) with the appropriate word(s).
A fuel cell is a device that uses fossil fuels such as natural gas or propane to produce electricity without combustion, extracting ____, which is used to create power similar to how a battery works.
A. nitrogen B. oxygen C. halogen D. hydrogen
The NAND logic function of a relay ladder circuit is performed by __________.
A. two or more N.O. push buttons connected in series B. two or more N.O. push buttons connected in parallel C. two or more N.C. push buttons connected in series D. two or more N.C. push buttons connected in parallel
All of the following are true regarding the use of a fog stream on an interior fire attack except:
A. discharge pattern can be adjusted to suit the situation. B. is not affected by wind. C. can aid in ventilation. D. provide maximum protection to firefighters