A diesel engine has excessive black smoke when started in the morning. Which of these could be the cause?
A. A bad fuel injector nozzle
B. A restricted fuel filter
C. A blocked fuel tank vent
D. A leaking fuel return line
Answer: Option A
Related Questions on Air Pollution and its Control in Automobile
What is the purpose of crank case ventilation?
A. To prevent pressure build up
B. To prevent temperature build up
C. To increase the blow by gas
D. To reduce the combustion leak
A. Exhaust system and intake system
B. Crank case and intake system
C. Crank case and exhaust system
D. Exhaust system and catalytic converter
In a petrol fuel injected engine, the air and fuel are mixed in the
A. Throttle body
B. Intake manifold chamber
C. Intake ports
D. Combustion chambers
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