What is the advantage of the extended media surface area in pleated filters?
A) Allows the filter to be flipped over when one side is dirty
B) Allows the filter to be folded
C) Much higher dust-holding ability
D) Creates cyclonic filtration action between the pleats
C
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Which modes of heat transfer occur in gases, such as air?
What will be an ideal response?
Which of the following statements best describes how EGR functions to reduce NOx emissions?
A. reduces oxygen intake to the engine B. routes HC into engine cylinder C. routes PM into engine cylinder D. cools down the intake charge
Toxic organic compounds that contaminate soils are an environmental problem because they may:
A) contaminate or be taken up by plants and so cause toxic effects to animals or people eating the plants. B) leach to groundwater cause toxic effects in drinking water or aquatic ecosystems. C) kill or inhibit soil organisms (other than any pest targeted). D) kill or injure plants (other than any target weeds). E) all of the above
Each manufacturer of vitrified clay pipe designs its own joints specifically for its brand of pipe, so pipe from two manufacturers does not always join together properly. The term used to describe this situation is that the types of pipe and joints are
A. proprietary B. copyrighted C. trademarked D. protected