The question asks for the standard meridian on which Indian Standard Time (IST) is based. We need to recall the specific longitudinal value designated for IST.
C) 82°30'E is the standard meridian on which Indian Standard Time (IST) is based. This meridian passes through Mirzapur in Uttar Pradesh and is \(5\) hours and \(30\) minutes ahead of GMT/UTC.
The question asks for the primary factor causing cold wave conditions in North India during winter. We need to evaluate each option based on its meteorological relevance to the winter season in India.
D) Snowfall in nearby Himalayan ranges and cold winds from the Caspian Sea — This option correctly identifies the two main factors responsible for cold wave conditions in North India during winter. The snow-covered Himalayas act as a source of cold air, and the influx of cold winds from Central Asia (often channeled by Western Disturbances) further lowers temperatures.
The question asks to identify the local wind phenomenon characterized by hot, dry, and oppressive winds blowing in the Northern plains of India during the summer season. We need to recall the characteristics of various local winds and weather phenomena in India.
Correct Option: A) Loo is the name given to the hot, dry, and oppressive winds that blow across the Northern plains of India from Punjab to Bihar during the summer season. These winds are notorious for causing heatstroke.
The question asks about the number of distinct seasons recognized by the Indian Meteorological Department (IMD). This requires knowledge of the IMD's classification of seasons in India.
Correct Option: B) Four. The Indian Meteorological Department officially recognizes four distinct seasons: Winter, Pre-Monsoon (Summer), Southwest Monsoon, and Post-Monsoon.
The question asks about the number of two-monthly seasons in a year according to the traditional Indian calendar. This requires knowledge of the structure of the traditional Indian calendar, specifically its division into seasons (Ritus).
Correct Option: C) Six
The question asks about the normal onset date of the Southwest Monsoon over the Kerala coast. This is a factual question related to Indian geography and climatology, specifically the timing of a major weather phenomenon.
D) 1st June is the widely accepted and climatologically normal date for the onset of the Southwest Monsoon over the Kerala coast.