Some air brake systems have an alcohol evaporator. What may happen if you don't keep the unit filled with alcohol?
A. Ice may from on the brake drums and wear them out.
B. The S-cam may not take back when you release the brake pedal
C. Ice may form in the air brake tanks and cause brake failure.
Answer: C. Ice may form in the air brake tanks and cause brake failure.
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How does soot accumulation on the inside of the heat exchanger affect system efficiency?
A) The soot increases the heat exchanger internal resistance, thereby increasing efficiency. B) The soot provides extra fuel during the high-fire stage, thereby increasing efficiency. C) The soot acts like an insulator on the inside of the heat exchanger, thereby increasing efficiency. D) The soot acts like an insulator on the inside of the heat exchanger, thereby reducing efficiency.
Variable valve timing is used to ________
A) Reduce exhaust emissions B) Increase engine performance C) Reduce engine wear D) Both A and B
You should lightly apply your brakes to flash the brake lights if:
a. A police car is approaching you from the other direction. b. You are about to exit the road and need to slow down. c. A driver tailgates you vehicle.
Describe the diffused junction method of forming a semiconductor.
What will be an ideal response?