सिभिल इन्जिनियरिङ
सिभिल इन्जिनियरिङ
Civil Engineering · ५,१७१ प्रश्न
५,१७१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
सिभिल इन्जिनियरिङ: 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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Dissolved oxygen in water is commonly determined by the:
सही उत्तर: क) Winkler (iodometric) method
The Winkler method fixes DO with manganese sulphate and alkali-iodide, then titrates the liberated iodine.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Most Probable Number (MPN) test in water analysis is used to estimate the:
सही उत्तर: ग) Number of coliform bacteria
The multiple-tube fermentation (MPN) test statistically estimates coliform density per 100 mL.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Safe drinking water should contain E. coli (faecal coliform) at a level of:
सही उत्तर: घ) Zero per 100 mL sample
Drinking water standards (WHO and Nepal NDWQS) require no detectable E. coli in any 100 mL sample.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The WHO guideline value for arsenic in drinking water is:
सही उत्तर: क) 10 μg/L
WHO's provisional guideline for arsenic is 10 μg/L (0.01 mg/L).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per Nepal's National Drinking Water Quality Standards (NDWQS), the maximum permissible concentration of arsenic in drinking water is:
सही उत्तर: क) 50 μg/L
Nepal's NDWQS sets arsenic at 50 μg/L (0.05 mg/L), while the WHO guideline value is 10 μg/L.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Water that is produced but not billed, due to leakage, illegal connections and metering errors, is called:
सही उत्तर: क) Non-revenue water
Non-revenue water (unaccounted-for water) includes physical losses (leaks) and commercial losses (theft, meter errors).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The logistic curve method of population forecasting assumes that population growth follows a(n):
सही उत्तर: ख) S-shaped curve approaching a saturation limit
The logistic curve shows slow early growth, rapid middle growth and then levelling off toward a saturation population.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A town had populations of 40,000, 46,000, 54,000 and 64,000 in four successive decades. By the incremental increase method, the population after the next decade is:
सही उत्तर: क) 74,000
Increments 6000, 8000, 10000 (mean 8000); increments of increase 2000, 2000 (mean 2000); P = 64,000 + 8000 + 2000 = 74,000.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A flowing artesian well occurs when:
सही उत्तर: क) The piezometric surface of a confined aquifer lies above the ground surface at the well
If the confined aquifer's pressure head rises above ground level, water flows out without pumping.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When water is pumped from a well, the water table around it takes a shape known as the:
सही उत्तर: घ) Cone of depression
Pumping lowers the water table most at the well, forming a cone of depression whose outer limit is the radius of influence.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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