इन्जिनियरिङ काउन्सिल (NEC) – Engineering Council (NEC) MCQ
इन्जिनियरिङ काउन्सिल (NEC) – लाइसेन्स परीक्षा
Engineering Council (NEC) · Nepal Professional License Exams · ५९७ प्रश्न
५९७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
इन्जिनियरिङ काउन्सिल (NEC): 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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यदि कुनै रेखाको होल सर्कल बेयरिङ (WCB) १८०° भन्दा कम छ, तर त्यसको ब्याक बेयरिङ (Back bearing) ज्ञात छैन, तर त्यसको WCB को मान ६०° हो, तब ब्याक बेयरिङको गणना कसरी गरिन्छ?
सही उत्तर: ख) २४०°
WCB १८०° भन्दा कम भए ब्याक बेयरिंग = WCB + १८० हुन्छ। यस अवस्थामा ब्याक बेयरिङ २४०° हुन्छ।
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The capital recovery factor, which converts a present sum P into n equal annual payments at interest rate i, is:
सही उत्तर: ख) i(1 + i)^n / [(1 + i)^n − 1]
A = P × i(1 + i)^n/[(1 + i)^n − 1]; its reciprocal is the present worth factor of an annuity and i/[(1 + i)^n − 1] is the sinking fund factor.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Hyatt Regency walkway collapse (Kansas City, 1981) is a classic engineering-ethics case mainly because:
सही उत्तर: ग) A change in the hanger-rod connection detail roughly doubled the load on a connection and was approved without proper checking
The original continuous rods were replaced by two offset rods, doubling the load on the fourth-floor connection, and the engineers did not adequately review the change.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In occupational health and safety, the most effective control in the hierarchy of hazard controls is:
सही उत्तर: घ) Elimination of the hazard
The hierarchy runs from elimination, substitution and engineering controls to administrative controls and finally PPE, the least effective.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a waste stabilisation (oxidation) pond, the oxygen used by aerobic bacteria is supplied mainly by:
सही उत्तर: क) Algae through photosynthesis
Oxidation ponds rely on a symbiosis in which algae produce oxygen by photosynthesis and bacteria release CO2 and nutrients while oxidising organic matter.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A drop manhole is provided in a sewerage system where:
सही उत्तर: क) A branch sewer joins a main sewer at a considerably higher level
A drop manhole carries the incoming sewer down through a vertical drop pipe, avoiding the steep gradient or splashing in the manhole.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Softening of water by the base exchange process uses:
सही उत्तर: ख) Zeolites
In base exchange, sodium zeolite exchanges its sodium for the calcium and magnesium ions causing hardness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When chlorine is added to water, which species is the most effective disinfectant?
सही उत्तर: ग) Hypochlorous acid (HOCl)
HOCl is about 80-100 times more effective than OCl⁻, which is why chlorination is more effective at lower pH.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Aeration in water treatment is mainly used to:
सही उत्तर: घ) Remove dissolved gases such as CO2 and H2S and oxidise iron and manganese
Aeration strips odour-causing and corrosive gases and oxidises dissolved iron and manganese so they can be settled or filtered.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The track gauge of a broad gauge railway line as used in India is:
सही उत्तर: घ) 1676 mm
Indian broad gauge is 1676 mm (5 ft 6 in); 1435 mm is standard gauge, 1000 mm metre gauge and 762 mm a narrow gauge.
💬 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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