संरचना विश्लेषण र RCC – Structures & RCC MCQ
संरचना विश्लेषण र RCC – सिभिल इन्जिनियरिङ
Structures & RCC · Civil Engineering · ५०१ प्रश्न
५०१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
संरचना विश्लेषण र RCC: 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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As per IS 456:2000, the deflection occurring after construction of partitions (including creep and shrinkage) should not exceed span/350 or:
सही उत्तर: घ) 20 mm, whichever is less
To protect partitions and finishes, IS 456 limits this deflection to span/350 or 20 mm, whichever is less.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 456:2000, the basic span to effective depth ratio for a continuous beam (span up to 10 m) is:
सही उत्तर: ग) 26
Basic l/d ratios are 7 for cantilever, 20 for simply supported and 26 for continuous members.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 456:2000, the spacing of distribution (secondary) bars in a slab should not exceed:
सही उत्तर: ख) 5d or 450 mm, whichever is less
Main bars: 3d or 300 mm; distribution bars: 5d or 450 mm, whichever is smaller (d = effective depth).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 456:2000, the diameter of lateral ties in a column should not be less than one-fourth of the diameter of the largest longitudinal bar and in no case less than:
सही उत्तर: घ) 6 mm
IS 456 requires tie diameter ≥ φmax/4 and not less than 6 mm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 456:2000, the minimum nominal cover to the main reinforcement in footings is:
सही उत्तर: ख) 50 mm
IS 456 specifies a minimum cover of 50 mm for footings, which are in contact with soil.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 456:2000, the nominal concrete cover for 'severe' exposure condition is:
सही उत्तर: ख) 45 mm
IS 456 Table 16 gives nominal cover of 20, 30, 45, 50 and 75 mm for mild, moderate, severe, very severe and extreme exposure.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two-legged 8 mm Fe 415 vertical stirrups (Asv ≈ 100.5 mm²) are spaced at 150 mm in a beam of effective depth 450 mm. The shear resisted by stirrups, Vus = 0.87fy·Asv·d/sv, is about:
सही उत्तर: क) 109 kN
Vus = 0.87 × 415 × 100.5 × 450/150 ≈ 108 900 N ≈ 109 kN.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A short axially loaded column 300 mm × 300 mm of M20 concrete has 804 mm² of Fe 415 steel. Using Pu = 0.4fck·Ac + 0.67fy·Asc, its design axial capacity is about:
सही उत्तर: ग) 937 kN
Ac = 90 000 − 804 = 89 196 mm²; Pu = 0.4 × 20 × 89 196 + 0.67 × 415 × 804 ≈ 713.6 + 223.6 ≈ 937 kN.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A singly reinforced beam 300 mm wide has 942 mm² of Fe 415 tension steel in M20 concrete. By IS 456, the actual depth of neutral axis xu is about:
सही उत्तर: घ) 157 mm
Equating 0.36 fck b xu = 0.87 fy Ast: xu = 0.87 × 415 × 942/(0.36 × 20 × 300) ≈ 157 mm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a singly reinforced balanced section with Fe 500 steel (xu,max/d = 0.46), the limiting moment of resistance Mu,lim is about:
सही उत्तर: क) 0.133 fck b d²
Mu,lim = 0.36 (xu/d)(1 − 0.42 xu/d) fck b d² = 0.36 × 0.46 × (1 − 0.42 × 0.46) ≈ 0.133 fck b d².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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