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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The perception-reaction (PIEV) time adopted by IRC for calculating stopping sight distance is:
सही उत्तर: ख) 2.5 seconds
IRC recommends a total reaction time of 2.5 s for SSD.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a CBR test, the load sustained by the specimen at 2.5 mm penetration is 68.5 kg. Taking the standard load as 1370 kg, the CBR value is:
सही उत्तर: क) 5%
CBR = 68.5/1370 x 100 = 5%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Flakiness index of aggregates is the percentage by weight of particles whose least dimension is less than:
सही उत्तर: घ) 0.6 times their mean dimension
Flaky particles have least dimension below 0.6 of the mean sieve size.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Los Angeles abrasion test on road aggregates is used to evaluate their:
सही उत्तर: ग) Hardness (resistance to wear)
The Los Angeles test measures resistance of aggregate to abrasion, i.e. hardness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The softening point of bitumen is determined by the:
सही उत्तर: ख) Ring and ball apparatus
The ring and ball test gives the temperature at which bitumen softens under a steel ball.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ductility test on bitumen is normally conducted at a standard temperature of:
सही उत्तर: क) 27°C
IS/IRC procedure specifies ductility testing at 27°C with a pulling rate of 50 mm/min.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The activated sludge process is a:
सही उत्तर: ख) Suspended-growth aerobic process
Microorganisms are kept in suspension in an aerated tank and part of the settled sludge is returned.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In sewage treatment, a grit chamber is provided to remove:
सही उत्तर: ग) Heavy inorganic particles like sand and gravel
Grit chambers slow the flow so heavy inorganic particles settle while organic matter passes on.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The trap in a sanitary fitting mainly serves to:
सही उत्तर: ग) Prevent foul gases from entering the building by a water seal
The water held in a trap forms a seal that blocks sewer gases.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Crown corrosion of concrete sewers is caused mainly by:
सही उत्तर: घ) Hydrogen sulphide gas
H2S from septic sewage is oxidised to sulphuric acid on the sewer crown, which attacks concrete.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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