What percentage of the world’s total water is saline and held in the oceans?
Correct answer D. 97.5%
Topic / 284 questions
Water Management MCQs
Page 14 of Water Management multiple-choice questions with answers. Tap an option to check yourself.
Page 14 of 15
What percentage of the available soil moisture is considered readily available to plants?
Correct answer C. 80%
Which water in the root zone, making up roughly half of the soil moisture, is always available to plants?
Correct answer C. Capillary water
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On what does water storage efficiency in the root zone depend?
Correct answer C. Porosity
On which river is the Tanda Dam built?
Correct answer A. Kohat
When the reservoir upstream is full, where does the maximum stress in a dam occur?
Correct answer A. Bottom of dam
What are the steep conduits through a dam that carry water to turbines for hydroelectric power called?
Correct answer C. Penstocks
What is the resultant water pressure on the face of a dam, where w is the unit weight of water and H the depth?
Correct answer B. 1/2 wH²
What type of flow always occurs within the ground?
Correct answer D. Laminar
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Sterilisation of water kills which organisms that cause waterborne diseases, making it safe for hospital use?
Correct answer C. Pathogenic bacteria
What is the permissible limit of water hardness for a low-pressure boiler?
Correct answer B. 50 mg/litre
What is an escape built of masonry or pitched with stones to dispose of surplus water from a tank or reservoir called?
Correct answer C. Paved escape
Surface tension lets a liquid resist tensile stress. What is the surface tension of water in kg/m?
Correct answer D. 0.0075
Specific gravity is the ratio of a liquid’s specific weight to that of pure water at standard temperature and pressure. What, therefore, is the specific gravity of pure water?
Correct answer C. 1.0
What is a dam built to divert water from the main stream into other channels called?
Correct answer B. Diversion dam
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Which device can be used to dispose of silt effectively when it settles in a dam reservoir?
Correct answer A. Vortex pipes
What is the waterway built to discharge surplus water from a dam called?
Correct answer B. Spillway
What type of dam resists the uplift pressure of sub-soil water by its own weight?
Correct answer C. Gravity dam
At what height above the base does the resultant water pressure act on a vertical wall of water depth H?
Correct answer B. H/3
An area is officially declared drought-affected if its mean annual rainfall is less than what percentage of the annual potential evaporation?
Correct answer D. 85%