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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Bakelite, a thermosetting plastic used for electrical fittings, is a:
सही उत्तर: ग) Phenol formaldehyde resin
Bakelite is a phenol-formaldehyde resin that sets permanently on heating and is a good electrical insulator.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Thermoplastic materials such as PVC and polyethylene:
सही उत्तर: ग) Soften on heating and harden on cooling repeatedly
Thermoplastics can be reheated and reshaped many times, unlike thermosetting plastics which set permanently.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Glass that has one surface roughened by sandblasting or etching, so that light passes through but vision is obscured, is called:
सही उत्तर: क) Frosted (ground) glass
Frosted or ground glass diffuses light, giving privacy in bathrooms and offices.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Wired glass is used in windows and skylights mainly because:
सही उत्तर: क) The embedded wire mesh holds broken pieces together, especially in fire
Wire mesh embedded during rolling keeps fragments in place when the glass cracks, giving fire and safety resistance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Whitewash used on walls is prepared from:
सही उत्तर: ग) Slaked lime mixed with water, with a little gum or glue
Whitewash is fat lime slaked and mixed with water, often with gum, rice paste or salt to improve adhesion.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Spirit varnish dries mainly by:
सही उत्तर: घ) Evaporation of the spirit solvent
Spirit varnishes are resins dissolved in alcohol; when the spirit evaporates a thin resin film remains.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cement paint, used on exterior masonry, has as its base:
सही उत्तर: ख) White cement
Cement paint is a powder of white cement with pigments and additives, mixed with water and applied on damp masonry.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Enamel paint gives a hard glossy finish because its vehicle consists mainly of:
सही उत्तर: ख) Varnish
Enamel paint is made by mixing pigment with varnish, which forms a hard, glossy, impervious film.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Emulsion paints are:
सही उत्तर: घ) Water-based paints in which a binder such as PVA or acrylic is dispersed in water
Emulsion paints use synthetic resin emulsions in water, so they dry quickly, have little odour and can be thinned with water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Chalking' of paint means:
सही उत्तर: क) Formation of a fine powder on the painted surface due to weathering of the binder
Weathering breaks down the binder at the surface, leaving loose pigment that rubs off as powder.
💬 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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