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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Camber on a road surface is most commonly provided in the shape of a:
सही उत्तर: घ) Parabola or straight lines meeting at the crown
Cambers are parabolic, straight (two planes) or combined (parabolic at centre, straight at edges); parabolic is preferred by fast vehicles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A sharp bend on a hill road where the road turns back almost on itself to gain height is called a:
सही उत्तर: क) Hairpin bend
Hairpin bends allow a hill road to climb a steep slope in zig-zag; they require special design for radius, widening and gradient.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For designing valley curves for headlight sight distance, IRC takes the headlight height and the upward beam angle as:
सही उत्तर: ग) 0.75 m and 1°
The headlight is assumed 0.75 m above the road with its beam inclined 1° upward.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A summit curve joins grades with deviation angle N = 0.06. For a stopping sight distance of 120 m (L greater than S), using L = NS²/4.4, the length of the summit curve is about:
सही उत्तर: ग) 196 m
L = 0.06 × 120²/4.4 = 864/4.4 ≈ 196 m, which is greater than S, so the assumption holds.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A clear zone that must be kept free of obstructions on the inner side of a horizontal curve to provide the required sight distance is defined by the:
सही उत्तर: क) Set-back distance
Set-back distance is measured from the centre line of the inner lane to the obstruction, so that the sight line remains unobstructed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 7.5 m wide pavement is superelevated to 0.07 by rotating about its inner edge, at a rate of 1 in 150. The length of superelevation runoff is about:
सही उत्तर: क) 78.8 m
Rise of outer edge = 7.5 × 0.07 = 0.525 m; length = 0.525 × 150 ≈ 78.8 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IRC, the maximum superelevation on hill roads not affected by snow is:
सही उत्तर: ग) 10%
IRC limits superelevation to 7% in plain/rolling terrain and snow-bound hill areas, and 10% on hill roads not bound by snow.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For V = 80 km/h and R = 250 m on a plain-terrain road, e = V²/(225R) gives 0.114. The superelevation to be provided and the friction then developed at full design speed are:
सही उत्तर: ग) 0.07, with f ≈ 0.13 (less than 0.15, so safe)
Since 0.114 exceeds the 7% limit, provide e = 0.07; then f = V²/(127R) − e = 0.2016 − 0.07 ≈ 0.13, which is below 0.15, so the design is safe.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A horizontal curve has radius 100 m, superelevation 0.07 and lateral friction 0.15. The maximum safe speed on it is about:
सही उत्तर: क) 53 km/h
V = √[127R(e + f)] = √(127 × 100 × 0.22) = √2794 ≈ 52.9 km/h.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IRC, superelevation on curves of hill roads should be introduced at a rate (longitudinal slope of the outer edge relative to the centre line) not steeper than:
सही उत्तर: घ) 1 in 60
IRC allows the superelevation to be attained at 1 in 150 in plain and rolling terrain and 1 in 60 in mountainous and steep terrain.
💬 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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