20 questionswith explanationsfor RAS, Patwari, VDO and other Rajasthan exams
Which place in Rajasthan receives the highest average annual rainfall?
Answer: (3) Mount Abu
Explanation
Mount Abu, due to its altitude on the Aravalli, receives the highest average annual rainfall in Rajasthan.
The hot, dry winds that blow in Rajasthan during summer afternoons are known as:
Answer: (1) Loo
Explanation
The hot, dry westerly winds of summer are called 'Loo'; Mavath is winter rainfall.
Which type of soil covers the largest area of Rajasthan?
Answer: (4) Sandy (desert) soil
Explanation
Sandy or desert soil, found across western Rajasthan, covers the largest area of the state.
Which is the state tree of Rajasthan?
Answer: (2) Khejri
Explanation
Khejri (Prosopis cineraria) is the state tree of Rajasthan and is often called the 'Kalpavriksha of the desert'.
In Rajasthan, the average annual rainfall generally decreases in which direction?
Answer: (2) From south-east to north-west
Explanation
Rainfall is highest in the south and south-east (Hadoti, Banswara) and decreases towards the north-west (Jaisalmer, Sri Ganganagar).
Winter rainfall in Rajasthan caused by Western Disturbances is locally known as:
Answer: (4) Mavath
Explanation
Winter rain caused by Western Disturbances is called 'Mavath'; it is very beneficial for Rabi crops.
Black soil in Rajasthan is mainly found in which region?
Answer: (1) Hadoti region
Explanation
Black soil is found mainly in the Hadoti region (Kota, Bundi, Baran, Jhalawar) of south-eastern Rajasthan.
Which is the state flower of Rajasthan?
Answer: (3) Rohida
Explanation
Rohida (Tecomella undulata), also called 'Marwar teak', is the state flower of Rajasthan.
'Sewan' is a nutritious grass found mainly in which part of Rajasthan?
Answer: (4) Western desert region
Explanation
Sewan grass (Lasiurus sindicus) grows in the western desert, especially around Jaisalmer, and is valuable fodder.
In Rajasthan, the 50 cm isohyet runs roughly along which feature, dividing the state into dry and relatively humid parts?
Answer: (2) Aravalli range
Explanation
The 50 cm isohyet runs roughly along the Aravalli range; areas to its west are arid/semi-arid and those to its east receive more rainfall.
The ravines (Beehad) along the Chambal river are a result of which type of soil erosion?
Answer: (3) Gully erosion
Explanation
The Chambal ravines are formed by gully erosion, in which running water cuts deep channels into soft alluvial soil.
Which tree species is found most extensively in the forests of Rajasthan?
Answer: (1) Dhokra (Anogeissus pendula)
Explanation
Dhokra (Anogeissus pendula) is the most widely found tree in Rajasthan's forests, especially in dry deciduous forests.
Which district of Rajasthan receives the lowest average annual rainfall?
Answer: (3) Jaisalmer
Explanation
Jaisalmer in the extreme west gets the least rain of any district, well under 25 cm a year on average; Sam in Jaisalmer is often cited as the driest place.
India's highest recorded temperature of 51°C (19 May 2016) was measured at which place in Rajasthan?
Answer: (4) Phalodi
Explanation
Phalodi recorded 51.0°C on 19 May 2016, the highest temperature ever recorded in India.
Dust storms (aandhi) occur most frequently in which part of Rajasthan?
Answer: (1) North-west (Sri Ganganagar area)
Explanation
Sri Ganganagar in the north-west records the most dust-storm days in the state, mainly in May–June.
Which branch of the south-west monsoon gives the most rainfall to Rajasthan?
Answer: (1) Bay of Bengal branch
Explanation
Most of Rajasthan's rain comes from the Bay of Bengal branch, which enters from the east and south-east.
The Arabian Sea branch of the monsoon gives little rain to western Rajasthan mainly because:
Answer: (4) The Aravalli range runs parallel to its direction
Explanation
The south-west to north-east trend of the Aravalli is parallel to these winds, so they pass without being forced to rise and shed rain.
In the western sandy plain of Rajasthan, the 25 cm isohyet separates which two divisions?
Answer: (4) Arid desert (Marusthali) and semi-arid transitional plain
Explanation
The 25 cm isohyet divides the western plain into the arid desert (Marusthali) to its west and the semi-arid transitional plain (Rajasthan Bagar) to its east.
In the five-fold climatic division of Rajasthan used in RAS books, which of these falls in the very humid (ati-aardra) region?
Answer: (2) Banswara
Explanation
The very humid region gets over about 80 cm of rain and includes Banswara, Jhalawar and Mount Abu; Churu, Nagaur and Bikaner are arid or semi-arid.
In Koppen's classification of Rajasthan's climate, the code 'BWhw' denotes:
Answer: (4) Hot desert climate with dry winters
Explanation
B = dry, W = desert, h = hot, w = dry winter; BWhw covers the far west such as Jaisalmer. Semi-arid steppe is BShw.