सिभिल इन्जिनियरिङ
सिभिल इन्जिनियरिङ
Civil Engineering · ५,०७७ प्रश्न
५,०७७ 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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Calcium chloride added to concrete acts as a/an:
सही उत्तर: ग) Accelerator
Calcium chloride speeds up setting and early strength gain.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The appearance of water on the surface of freshly placed concrete is called:
सही उत्तर: ग) Bleeding
Bleeding is the upward movement of mixing water as heavier solids settle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The cumulative percentages retained on the 4.75, 2.36, 1.18, 0.6, 0.3 and 0.15 mm sieves for a sand are 2, 10, 30, 55, 80 and 98. Its fineness modulus is:
सही उत्तर: घ) 2.75
FM = (2+10+30+55+80+98)/100 = 275/100 = 2.75.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS classification, fine aggregate is the aggregate that mostly passes through the IS sieve of size:
सही उत्तर: घ) 4.75 mm
Aggregate passing the 4.75 mm sieve is classified as fine aggregate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bulking of sand is caused by:
सही उत्तर: ग) Thin films of surface moisture around the sand particles
Surface moisture films push particles apart and increase the bulk volume of damp sand.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Abrams' law states that the strength of fully compacted concrete depends mainly on its:
सही उत्तर: घ) Water–cement ratio
Abrams' law relates concrete strength inversely to the water–cement ratio.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 456, exposed surfaces of concrete made with OPC should be kept moist for at least:
सही उत्तर: ग) 7 days
IS 456 requires a minimum of 7 days moist curing for OPC concrete.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The characteristic strength of concrete is defined as the strength below which not more than:
सही उत्तर: ख) 5% of the test results are expected to fall
IS 456 defines characteristic strength at 5% probability of lower results.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the designation M25, the number 25 represents:
सही उत्तर: घ) Characteristic compressive strength of 150 mm cubes at 28 days in N/mm²
M stands for mix and 25 is the 28-day characteristic cube strength in N/mm².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The nominal mix proportion for M20 grade concrete is:
सही उत्तर: ख) 1 : 1.5 : 3
M20 nominal mix is 1:1.5:3; 1:2:4 corresponds to M15.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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