Engine cranks do no start during winter because of
1. Battery discharge
2. Weak spark
3. Worn out engine
4. Lean mixture
A. 1, 2 and 3 are correct
B. 2, 3 and 4 are correct
C. 3, 4 and 1 are correct
D. 4, 1 and 2 are correct
Answer: Option D
Solution (By Examveda Team)
Engine cranks may not start during winter due to several factors that affect engine performance in cold conditions.Battery Discharge: Cold weather can lead to the discharge of the battery, making it difficult for the engine to crank properly as the battery loses power more quickly in lower temperatures.
Weak Spark: A weak spark occurs when the spark plugs fail to generate enough energy to ignite the fuel mixture in cold conditions, preventing the engine from starting.
Lean Mixture: In cold weather, the air-fuel mixture may become lean (more air, less fuel), which makes it difficult for the engine to start since more fuel is required to ignite in cold conditions.
Thus, the correct answer is 4, 1 and 2 are correct.
This Question Belongs to Automobile Engineering >> Performance And Testing Of Engines
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Related Questions on Performance and Testing of Engines
Mechanical efficiency of an automobile engine usually varies in the range:
A. 50% - 60%
B. 60% - 70%
C. 70% - 90%
D. More than 90%
A. Increase
B. Decrease
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How many times in a minute does each valve on a 4-stroke engine running at 2000 rpm open and close?
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D. 4, 1 and 2 are correct
Here's the reasoning:
Battery Discharge:
In cold weather, battery capacity decreases, leading to insufficient power to crank the engine properly.
Weak Spark:
Cold temperatures can reduce the efficiency of the ignition system, resulting in weak sparks, which makes it harder for the engine to start.
Lean Mixture:
In cold weather, air is denser, which can lead to a leaner air-fuel mixture, making it difficult for the engine to ignite properly.