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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Cork, used for thermal and sound insulation, is obtained from:
सही उत्तर: ग) The outer bark of the cork oak tree
Cork is the light, cellular bark of the cork oak, valued for low conductivity and resilience.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Elastomeric bearings for bridges are commonly made of:
सही उत्तर: ख) Neoprene (synthetic rubber) with steel laminates
Laminated neoprene pads accommodate rotation and horizontal movement through shear deformation of the rubber.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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PTFE (Teflon) is used in sliding bearings of bridges mainly because it:
सही उत्तर: क) Has a very low coefficient of friction
PTFE sliding against polished stainless steel allows horizontal movement of the deck with very little friction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Zinc chromate primer is commonly used on:
सही उत्तर: घ) Steel and aluminium surfaces, to inhibit corrosion
Zinc chromate is a corrosion-inhibiting pigment used in primers for ferrous and non-ferrous metals.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a three-coat paint system, the main function of the undercoat is to:
सही उत्तर: ग) Provide a smooth, uniform, opaque base of suitable colour for the finishing coat
The priming coat seals and bonds, the undercoat builds body and hiding power, and the finishing coat gives the final appearance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Toughened (tempered) glass is produced by:
सही उत्तर: ख) Heating the glass to near its softening point and then rapidly cooling its surfaces with air jets
Rapid surface cooling puts the surfaces in compression and the core in tension, giving several times the strength of annealed glass.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An insulating glass unit (double glazing) consists of:
सही उत्तर: क) Two or more glass panes separated by a sealed space filled with dry air or gas
The sealed air or gas gap reduces heat and sound transmission through windows.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Aluminium sections for doors and windows are produced mainly by:
सही उत्तर: घ) Extrusion through a die
Heated aluminium billets are forced through shaped dies, producing long sections of complex profile.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Sherardising' of small steel articles such as bolts and nuts is a process of:
सही उत्तर: ग) Coating with zinc by heating the articles in contact with zinc dust
In sherardising, articles are heated with zinc dust in a closed drum, forming a zinc-iron alloy coating.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The bend and rebend test on reinforcement bars is carried out mainly to check their:
सही उत्तर: ख) Ductility
Bars are bent and then straightened back; absence of cracks shows adequate ductility.
💬 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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