Soot forming in the heat exchanger can be caused by:
A) The presence of coal tar in the gas. B) Too much gas in the gas—air mixture.
C) Excessively high combustion temperatures. D) Too much air in the gas—air mixture.
B
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Long arc lengths produce less spatter.
Answer the following statement true (T) or false (F)
Technician A says that camshaft rotation must be in the same direction as crankshaft rotation. Technician B says that camshaft rotation may be opposite to crankshaft rotation. Who is right?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
The proper color of a gas flame is ____.
A. sharp all blue B. lazy all blue C. blue with slight orange tips D. lazy with yellow tips
What type of head is the most common for screws used on unit covers?
A) Round head B) Hex head C) Allen head D) Square head