खानेपानी र सरसफाइ – Water Supply & Sanitation MCQ
खानेपानी र सरसफाइ – सिभिल इन्जिनियरिङ
Water Supply & Sanitation · Civil Engineering · ३८९ प्रश्न
३८९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
खानेपानी र सरसफाइ: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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In water supply design, the maximum hourly demand is commonly taken as about:
सही उत्तर: ख) 2.7 times the average hourly demand
Maximum daily demand is about 1.8 times the average, and the peak hour is 1.5 times that, giving 1.8 x 1.5 = 2.7.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The population of a town was 40,000 in 2001, 48,000 in 2011 and 57,600 in 2021. By the geometric increase method, the population in 2031 will be:
सही उत्तर: ग) 69,120
The growth rate is a constant 20% per decade, so 57,600 x 1.2 = 69,120.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The population of a town was 50,000 in 2000, 58,000 in 2010 and 66,000 in 2020. By the arithmetic increase method, the population in 2040 will be:
सही उत्तर: घ) 82,000
The average increase is 8,000 per decade, so 66,000 + 2 x 8,000 = 82,000.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which population forecasting method is most suitable for a young, rapidly growing city?
सही उत्तर: क) Geometric increase method
Young cities grow at a roughly constant percentage rate, which the geometric increase method assumes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A town of 10,000 population has a per capita demand of 100 litres per day. The total daily water demand is:
सही उत्तर: ख) 1,000 m³/day
10,000 x 100 L = 1,000,000 L = 1,000 m³/day.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per National Drinking Water Quality Standards of Nepal, the acceptable pH range of drinking water is:
सही उत्तर: ग) 6.5 - 8.5
NDWQS sets pH of drinking water between 6.5 and 8.5.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The most widely used disinfectant for public water supply is:
सही उत्तर: ख) Chlorine
Chlorine is cheap, effective and leaves a residual that protects water in the distribution system.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The most commonly used coagulant in water treatment is:
सही उत्तर: ख) Alum (aluminium sulphate)
Alum forms flocs that trap suspended particles during coagulation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The standard BOD test is conducted for:
सही उत्तर: घ) 5 days at 20°C
BOD5 at 20°C is the standard measure of biodegradable organic matter.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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