89. A diesel engine has excessive black smoke when started in the morning. Which of these could be the cause?
90. In Diesel engines, the control of black smoke in the exhaust can be achieved by:
1. Running the engine at lower load.
2. Maintaining the injection system perfect.
3. Using Diesel fuel of higher Cetane number.
Which of the above statements are correct?
1. Running the engine at lower load.
2. Maintaining the injection system perfect.
3. Using Diesel fuel of higher Cetane number.
Which of the above statements are correct?
91. Which of the following exhaust gas component is reduced significantly by retardation of the ignition timing?
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