If Gear A turns left in the figure above, Gear B___________________.
Answer(s): C
Gears in mesh always turn in opposite directions.
If Gear 1 makes 10 complete clockwise revolutions per minute in the figure above, then ____________.
Answer(s): B
If Gear 1 turns at 10 rpm, then Gear 2, which is half the size, turns twice as fast at a rate of 20 rpm.
For the fuel to travel from Reservoir A to Reservoir B, passing through Filters C and D on the way, which valves must be open?
Answer(s): A
Opening Valves 1, 2, 4, and 8 allows the fuel to travel through the filters. Opening Valves 1, 2, and 3 doesn’t allow the fuel to travel through the filters. Opening Valves 6, 7, and 9 doesn’t allow the fuel to travel through the filters.Opening Valves 4, 6, and 7 will allow fuel to travel through the filters but not to Reservoir B.
A yellow flame on a gas furnace indicates _______________.
A yellow flame indicates too much fuel or not enough air. More air should be allowed to enter and mix with the gas. Thus, the fuel-air mixture is too rich.
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