नेपाल व्यावसायिक लाइसेन्स नेपाल इन्जिनियरिङ काउन्सिल लाइसेन्स तयारी
नेपाल व्यावसायिक लाइसेन्स – नेपाल इन्जिनियरिङ काउन्सिल लाइसेन्स
NEC License Exam · Nepal Professional License Exams
२,४१४ प्रश्न उपलब्ध। मोड छान्नुहोस्:
लाइसेन्स परीक्षा: 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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The treatment of sewage in a septic tank takes place mainly through:
सही उत्तर: घ) Anaerobic decomposition
In a septic tank, settled solids are digested by anaerobic bacteria in the absence of oxygen.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hardness of water is mainly caused by dissolved salts of:
सही उत्तर: घ) Calcium and magnesium
Total hardness is due chiefly to calcium and magnesium bicarbonates, sulphates and chlorides.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which chemical is most commonly used as a coagulant in conventional water treatment?
सही उत्तर: क) Aluminium sulphate (alum)
Alum hydrolyses to form aluminium hydroxide flocs that destabilise and capture colloidal particles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The standard BOD test commonly reported for wastewater (BOD5) is carried out by incubating the sample for 5 days at:
सही उत्तर: ख) 20°C
BOD5 is the oxygen demand measured after incubation for 5 days at 20°C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In highway design, the relationship between superelevation (e), lateral friction (f), design speed V (km/h) and radius R (m) is:
सही उत्तर: क) e + f = V²/(127R)
Equilibrium on a curve gives e + f = v²/(gR) = V²/(127R) when V is in km/h and R in m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The California Bearing Ratio (CBR) test is mainly used for:
सही उत्तर: क) Design of flexible pavement thickness
The CBR value of subgrade soil is used in empirical design of flexible pavement thickness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main purpose of providing camber on a road surface is to:
सही उत्तर: ख) Drain off rainwater quickly from the carriageway
Camber is the transverse slope given to the road surface for drainage; superelevation counteracts centrifugal force on curves.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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On a topographic map, contour lines that are closely spaced indicate:
सही उत्तर: क) A steep slope
Close spacing of contours means a large change in elevation over a small horizontal distance, i.e., steep ground.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The combined correction for curvature and refraction in levelling (in metres, with distance D in kilometres) is approximately:
सही उत्तर: ग) 0.0673 D²
Curvature correction is 0.0785 D² and refraction about 1/7 of it (0.0112 D²), giving a combined correction of 0.0673 D² (subtractive).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In stadia tacheometry with an anallactic lens, the horizontal distance for a horizontal line of sight is D = Ks, where the multiplying constant K is usually:
सही उत्तर: ख) 100
Tacheometers are usually designed with multiplying constant 100 and, with an anallactic lens, additive constant zero.
💬 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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