इन्जिनियरिङ सेवा असिस्टेन्ट सब-इन्जिनियर (चौथो तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – असिस्टेन्ट सब-इन्जिनियर (चौथो तह)
Assistant Sub-Engineer – 4th Level · Engineering Service
७०३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
प्राविधिक पत्र: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ५ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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A water distribution layout that has many dead ends is the:
सही उत्तर: ग) Dead-end (tree) system
In the tree system, branches end at dead ends where water can stagnate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Hardy Cross method is used for:
सही उत्तर: घ) Analysis of flows in a looped pipe network
Hardy Cross balances heads around loops by successive corrections to find flows in each pipe.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Head loss in a 1,000 m long pipe of 200 mm diameter carrying water at 1 m/s with Darcy friction factor f = 0.02 is about:
सही उत्तर: क) 5.1 m
hf = fLV^2/(2gD) = 0.02 x 1000 x 1 / (2 x 9.81 x 0.2) = 5.1 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Dissolved salts such as sodium chloride are most effectively removed from water by:
सही उत्तर: क) Reverse osmosis
A reverse osmosis membrane holds back dissolved ions that ordinary treatment cannot remove.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Colour of water is commonly measured on the:
सही उत्तर: ख) Platinum-cobalt scale
Water colour is compared with platinum-cobalt standards and reported in Hazen (true colour) units.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The organism most commonly used as an indicator of faecal contamination of water is:
सही उत्तर: ग) Escherichia coli
E. coli lives in the human gut in large numbers, so its presence shows faecal pollution.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Nepal, arsenic contamination of groundwater is mainly a problem in the:
सही उत्तर: घ) Terai region
Shallow tube wells in the Terai have been found to contain arsenic above the safe limit.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Methaemoglobinaemia (blue baby syndrome) in infants is linked to a high concentration in drinking water of:
सही उत्तर: घ) Nitrates
Nitrate is converted to nitrite, which reduces the blood's oxygen-carrying capacity in infants.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Water containing excess fluoride, when drunk for a long time, causes:
सही उत्तर: क) Fluorosis
Too much fluoride causes dental and skeletal fluorosis; too little causes dental caries.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Solar disinfection (SODIS) of drinking water at household level uses:
सही उत्तर: ख) Clear plastic (PET) bottles exposed to sunlight
SODIS uses the UV rays and heat of sunlight to kill germs in water held in clear PET bottles.
💬 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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