Fossil fuel heating systems must be set up properly to ensure that they operate as intended. Improper fuel-air mixtures on a fossil fuel appliance can lead to what four problems?
What will be an ideal response?
improper combustion, reduced operating efficiency, soot buildup, the introduction of carbon monoxide to the occupied space
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_________________ gears are used to obtain large speed reductions between nonintersecting shafts placed at 90-degree angles to one another.
a. Spur b. Worm c. Helical d. Bevel
Which of the following will damage a 3Ø motor?
a. Wire size and circuit breaker sized too large. b. Voltage and amperage to motor is 10% too high. c. Loss of phase or a voltage imbalance over 2%.
Parallel data transfers between two different sets of registers requires more than one shift pulse
Indicate whether the statement is true or false
OSHA requires that a fall protection plan be prepared for any project where workers will be above the ground
surface at a height of more than _____. a. 6? b. 9? c. 12? d. 20?