An electric train is running at the speed of 50 km per hour from Mumbai to Delhi. What would be the direction of the smoke?

Appeared in: BHU NO-2019

Explanation

The question is a logical puzzle that hinges on a key detail: the train is electric.
Electric trains are powered by electricity and do not have combustion engines.
Since there is no burning of fuel (like coal or diesel), no smoke is produced.
Therefore, asking for the direction of the smoke is a trick, as there is no smoke to have a direction.

Option B: This option assumes smoke is produced and gives a specific direction. An electric train does not produce smoke, making any direction incorrect.
Option C: Similar to 'East', this option is incorrect because it is based on the false premise that smoke exists. Electric trains are smokeless.
Option D: This option is also incorrect as it presupposes the existence of smoke. The type of train (electric) makes the production of smoke impossible.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning and Attention to Detail as background academic context rather than a clinical decision trigger.
While not a clinical question, this type of logical reasoning is crucial in nursing for critical thinking and problem-solving.
Nurses must pay close attention to details in patient charts, medication orders, and symptoms to avoid errors. Misinterpreting a key detail, like 'electric' in this question, is analogous to misreading a drug dosage or a patient's allergy information.
What if the question was about a diesel train? The answer would depend on the train's direction and the wind's direction and speed. The smoke would generally travel in the opposite direction of the train's movement, influenced by the wind.

How to Approach the Question

First, read the question carefully, identifying every piece of information provided: type of train, speed, and route.
Identify the core question: 'What would be the direction of the smoke?'.
Analyze the key term: 'electric train'. Ask yourself what the properties of an electric train are.
Recall or deduce that electric trains run on electricity and do not produce by-products of combustion, such as smoke.
Conclude that the premise of the question (that there is smoke) is false.
Evaluate the options based on this conclusion. Since there is no smoke, options suggesting a direction (East, West, North) are incorrect. Therefore, 'None of the above' is the only logical choice.

Concept Tested & Keywords

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Practise the full BHU NO-2019

Attempt every question from this paper in a timed mock, then review the full solution for each one.