Which of the following operates at the highest temperatures?
A. exhaust valves
B. intake valves
C. solid lifters
D. rockers
Answer: A
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A 2010 EPA diesel engine cranks but will not start. Which of the following could be a cause?
A. Faulty proportional solenoid in the port helix pump control B. Excessive ammonia stored in the SCR catalyst C. In-range failure of a NOx sensor D. Empty fuel tank
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?When two or more atoms combine, the resulting structure is known as a(n) ____.
A. ?isomer B. ?molecule C. ?isotope D. ?polymer
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The Boer is a type of dairy goat
Indicate whether this statement is true or false.
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Dimensions are rounded to the nearest ____ inch.
A. eighth B. quarter C. half D. whole
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