तुषार क्रिया सबसे प्रभावी किस परिस्थिति में होती है?
Under which condition is frost action most effective?
Explanation opens after your attempt
A. तापमान बार बार हिमांक के आसपास ऊपर नीचे हो और दरारों में जल उपलब्ध होTemperature repeatedly fluctuates around freezing point and water is present in cracks
Concept
Water expands on freezing and exerts pressure on cracks. Exam tip: mention both water and near-freezing temperature.
Why this answer is correct
The correct answer is A. तापमान बार बार हिमांक के आसपास ऊपर नीचे हो और दरारों में जल उपलब्ध हो / Temperature repeatedly fluctuates around freezing point and water is present in cracks. Water expands on freezing and exerts pressure on cracks. Exam tip: mention both water and near-freezing temperature.
Exam Tip
जल जमकर फैलता है और दरारों पर दबाव डालता है। परीक्षा में जल और हिमांक के आसपास तापमान दोनों शर्तें लिखें।
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