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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Design traffic N = 365 × A × [(1 + r)ⁿ − 1]/r × D × F. For A = 2000 CVPD, r = 7.5%, n = 15 years, D = 0.75 and F = 2.5, N is about:
सही उत्तर: घ) 35.7 msa
N = 365 × 2000 × [(1.075)¹⁵ − 1]/0.075 × 0.75 × 2.5 ≈ 365 × 2000 × 26.12 × 1.875 ≈ 35.7 million standard axles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a CBR test, the load at 5.0 mm penetration is 100 kg. Taking the standard load at 5.0 mm as 2055 kg, the CBR at 5.0 mm is about:
सही उत्तर: ख) 4.9%
CBR = 100/2055 × 100 ≈ 4.9%; normally the CBR at 2.5 mm is used unless the 5.0 mm value is higher on repeat test.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The float test is used to determine the consistency of:
सही उत्तर: घ) Road tar and soft bitumen that are too soft for the penetration test
The float test measures the time for water to break through a plug of the material, suited to materials too soft for the penetration test.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A radar speed gun used by traffic police and engineers measures:
सही उत्तर: क) Spot speed of individual vehicles
Radar meters use the Doppler effect to give the instantaneous (spot) speed of a vehicle at a point.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Medium curing (MC) cutback bitumen is prepared by blending bitumen with:
सही उत्तर: ग) Kerosene
RC cutbacks use petrol/naphtha, MC cutbacks use kerosene and SC (slow curing) cutbacks use high-boiling oils.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the standard penetration test of bitumen, the needle load, duration and temperature are:
सही उत्तर: घ) 100 g, 5 seconds, 25 °C
Penetration is the depth in tenths of a mm that a standard needle penetrates under 100 g for 5 s at 25 °C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The stripping value test of aggregates is used to evaluate:
सही उत्तर: घ) The loss of bitumen coating from aggregates in the presence of water
Bitumen-coated aggregates are immersed in water at 40 °C; the percentage of uncoated surface shows the tendency to strip.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The soundness test on road aggregates, using sodium or magnesium sulphate solutions, evaluates their resistance to:
सही उत्तर: ग) Weathering action
Repeated soaking in sulphate and drying simulates weathering (freeze-thaw, wetting-drying); weight loss indicates unsoundness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The elongation index of aggregates is the percentage by weight of particles whose greatest dimension is more than:
सही उत्तर: क) 1.8 times their mean dimension
Elongated particles have length more than 1.8 times the mean dimension; flaky particles have thickness less than 0.6 times the mean dimension.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The angularity number of road aggregates generally ranges from:
सही उत्तर: ख) 0 for well-rounded gravel to about 11 for highly angular aggregate
Angularity number = 67 − percentage of solid volume in a standard cylinder; rounded gravel has about 33% voids (number 0) and angular aggregate up to about 11.
💬 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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