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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Veneers for plywood that are cut by rotating a log against a long knife, producing a continuous sheet, are called:
सही उत्तर: घ) Rotary-cut veneers
In rotary cutting, the log is turned in a lathe against a knife, peeling off a continuous veneer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Deodar, a durable softwood of the Himalayan region, has the botanical name:
सही उत्तर: ग) Cedrus deodara
Deodar is Cedrus deodara; Pinus roxburghii is chir pine and Shorea robusta is sal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Rueping process of timber preservation is an example of a/an:
सही उत्तर: ख) Empty-cell pressure process
In the Rueping process, initial air pressure makes the expanding air expel excess preservative, leaving the cell walls coated but the cells largely empty.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Case hardening' as a defect in the kiln seasoning of timber occurs when:
सही उत्तर: घ) The outer layers dry and set too quickly, leaving the interior in a stressed, wetter state
Rapid surface drying sets the outer shell under tension while the core is still moist, causing internal stresses and later checks.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Druxiness' is a timber defect characterised by:
सही उत्तर: ग) White decayed spots concealed by healthy wood
Druxiness shows as whitish decayed spots, generally entering through broken branches and hidden by sound wood.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 'conversion' of timber means:
सही उत्तर: क) Sawing felled logs into marketable sizes such as planks, battens and scantlings
Conversion is the process of cutting logs into commercial sizes after felling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Popping' or 'blowing' in a lime plaster surface is mainly caused by:
सही उत्तर: घ) Unslaked lime particles that slake and expand after the plaster is applied
Particles of quicklime left unslaked expand on later hydration, forming small conical holes or blisters in the plaster.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to the Indian Standard classification of building limes (IS 712), Class C lime, used mainly for finishing coats and whitewashing, is:
सही उत्तर: ख) Fat lime
Class A is eminently hydraulic lime for structural work, while Class C is fat lime used for finishing coat and whitewash.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Fine aggregate of fineness modulus 2.6 and coarse aggregate of fineness modulus 7.0 are to be combined to give an all-in aggregate of fineness modulus 5.4. The ratio of fine to coarse aggregate is about:
सही उत्तर: क) 1 : 1.75
If x is the fine fraction: 2.6x + 7.0(1 − x) = 5.4 gives x = 0.364; ratio = 0.364 : 0.636 ≈ 1 : 1.75.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As per IS 383, the Los Angeles abrasion value of coarse aggregate for concrete wearing surfaces should not exceed:
सही उत्तर: ग) 30%
IS 383 limits the LA abrasion value to 30% for wearing surfaces and 50% for other concrete.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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