Two technicians are discussing variable valve timing. Technician A says that changing the exhaust valve timing helps reduce exhaust emissions. Technician B says that changing the intake valve timing helps increase low-speed torque. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
Question 2
Many technicians always use new pushrods because ________.
A) They are less expensive to buy than clean
B) They wear at both ends
C) Pushrods shrink in length if removed from an engine
D) All dirt cannot be cleaned out from the hollow center
Refraction Through Uniform and Variable Thickness Glasses
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Summary of Single Variable Discrete Models