A vehicle with high levels of oxides of nitrogen (NOx) is being discussed. Technician A says engine overheating is a likely cause. Technician B says a defective turbocharger intercooler may be the cause. Who is correct?

A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B


Answer: B

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The top of a cylinder receives less lubrication, and it is subjected to the high pressure of the piston rings against the cylinder wall as the air-fuel mixture is ignited. This can result in ____________________ wear.

Fill in the blank(s) with the appropriate word(s).

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Your tractor broke down and was in the shop for 5.5 days. Mechanics worked on it for 23.2 hours at $80 per hour. They replaced $3,278.21 worth of parts. You lost $20 per hour by not having the use of the tractor. You work a 12-hour day. What did the breakdown actually cost?

What will be an ideal response?

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When competition exists, one species of wildlife will always increase in number as another decreases

Indicate whether the statement is true or false.

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A hybrid variety has an effect called hybrid vigor or _____________________ that makes the plant take on characteristics superior to the parent plants

Fill in the blank(s) with correct word

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