खानेपानी र सरसफाइ – Water Supply & Sanitation MCQ
खानेपानी र सरसफाइ – सिभिल इन्जिनियरिङ
Water Supply & Sanitation · Civil Engineering · ४०६ प्रश्न
४०६ 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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Egg-shaped sewers are preferred in combined systems because they:
सही उत्तर: ग) Maintain self-cleansing velocity even at low dry-weather flows
The narrow invert concentrates small flows, keeping velocity and depth adequate at low discharges while the large top carries storm flows.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The sewerage system in which domestic sewage and storm water are carried in separate conduits is the:
सही उत्तर: घ) Separate system
The separate system carries sanitary sewage and storm water in different sewers, reducing the load on treatment plants.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An intercepting trap is located:
सही उत्तर: क) At the junction of the house drain with the public sewer, usually in the last manhole
The intercepting trap prevents gases of the public sewer from entering the house drain.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A gully trap is provided in house drainage to:
सही उत्तर: ख) Receive wastewater from kitchens and baths and prevent foul gases from escaping, at ground level outside
A gully trap is a deep-seal trap outside the building that receives sullage and keeps sewer gases out.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An anti-siphonage pipe in house drainage is provided to:
सही उत्तर: ग) Preserve the water seal of traps by admitting air
It ventilates the trap outlets so that suction from discharges in the stack does not siphon the water seal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In building drainage, the system in which soil and waste pipes are separate and each has its own vent pipe is the:
सही उत्तर: घ) Two-pipe system
The two-pipe system uses separate soil and waste stacks with separate vents; the single stack uses one pipe without separate vents.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A pressure reducing valve (PRV) in a water distribution system is used to:
सही उत्तर: घ) Maintain a lower, steady downstream pressure regardless of higher upstream pressure
PRVs automatically throttle flow to keep the outlet pressure at a set value, protecting low-lying pipes and fittings.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A pump lifts 50 L/s of water against a total head of 60 m with 70% efficiency. The power required is about:
सही उत्तर: घ) 42 kW
P = ρgQH/η = 1000 × 9.81 × 0.05 × 60/0.7 ≈ 42,040 W ≈ 42 kW.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The valve most commonly used to completely stop or allow flow in a water main for repair is the:
सही उत्तर: घ) Sluice (gate) valve
Sluice/gate valves isolate pipe sections; air valves release air, reflux valves prevent backflow and safety valves relieve pressure.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main purpose of a service (distribution) reservoir in a water supply system is to:
सही उत्तर: क) Balance the fluctuating hourly demand against a steady supply
Service reservoirs store water during low demand and release it during peak hours, also maintaining pressure and fire reserve.
💬 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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