निर्माण सामग्री – Construction Materials MCQ
निर्माण सामग्री – सिभिल इन्जिनियरिङ
Construction Materials · Civil Engineering · १,००८ प्रश्न
१,००८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
निर्माण सामग्री: 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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A brick with one edge rounded, used for finishing corners or window sills, is called a:
सही उत्तर: घ) Bullnose brick
Bullnose bricks have a rounded edge and are used where sharp corners are to be avoided, as at quoins and sills.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Leaving dug-up brick earth exposed to the atmosphere for a few weeks to soften it and allow oxidation before tempering is called:
सही उत्तर: क) Weathering
Weathering exposes the earth to air and moisture so that lumps break down and impurities are oxidised before blending and tempering.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Before the compressive strength test of a brick, the frog is filled with mortar and the brick is first:
सही उत्तर: घ) Immersed in water for 24 hours
Bricks are tested in the saturated condition after 24 hours' immersion, with the frog filled flush with mortar to give a level bearing surface.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the dimension tolerance test of bricks, how many bricks are placed in contact in a row and measured together?
सही उत्तर: घ) 20
Twenty bricks are laid in a row (along length, then width and height) and the total measured, so that the average size and tolerance can be found.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the efflorescence test on bricks, if the white deposit covers more than 50% of the exposed area but there is no powdering or flaking, the efflorescence is classed as:
सही उत्तर: घ) Heavy
Efflorescence is graded nil, slight (up to 10%), moderate (10–50%), heavy (over 50% without powdering) and serious (heavy deposit with powdering or flaking).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cutback bitumen is:
सही उत्तर: घ) Bitumen whose viscosity is reduced by dissolving it in a volatile solvent such as kerosene
Cutbacks are fluid at lower temperatures; the solvent evaporates after laying, leaving the bitumen binder.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ring and ball apparatus is used to determine which property of bitumen?
सही उत्तर: ग) Softening point
In the ring and ball test, the temperature at which bitumen softens enough for a steel ball to sink through it is the softening point.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The penetration test on bitumen measures its consistency (hardness) as the depth a standard needle penetrates, expressed in units of:
सही उत्तर: क) 0.1 mm
A penetration value of 60 means the needle penetrated 6 mm, i.e. 60 units of 0.1 mm, under standard load, time and temperature.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the float glass process, molten glass is spread over a bath of:
सही उत्तर: ग) Molten tin
Molten glass floats on molten tin, forming a sheet with flat, parallel, polished surfaces.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Laminated safety glass consists of:
सही उत्तर: घ) Two or more glass sheets bonded with a plastic interlayer (e.g. PVB), which holds fragments together when broken
The plastic interlayer retains broken pieces, so laminated glass is used in windscreens and safety glazing.
💬 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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