For open-root V-groove welding of stainless-steel pipe, the bevel angle of the pipe should be _____
a. 10 to 15 degrees
b. 20 to 30 degrees
c. 10 to 30 degrees
d. 30 to 37-1/2 degrees
d
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The ____ for a liquid-cooled power equipment engine usually consists of a 50:50 mixture of distilled water and antifreeze.
a. lubricant b. coolant c. refrigerant d. reagent
A(n) ___________ is a weed that is difficult to kill by current means and that could take over agricultural crops
Fill in the blank(s) with correct word
____ means the best solution that can be achieved, considering all the requirements and constraints on the design.
A. Optimal B. Analytical C. Creative D. Aesthetic
Why are the EGR gases cooled before entering the engine on some engines?
A) To help prevent the exhaust from slowing down B) To prevent heating the air-fuel mixture in the cylinder C) To prevent damage to the intake valves D) Cool exhaust gas is more effective at controlling NOx emissions