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 flash point test of bitumen is important mainly for:
सही उत्तर: ग) Safety during heating, since it is the temperature at which vapours momentarily ignite
Bitumen must not be heated above its flash point during mixing to avoid fire hazard.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ductility test of bitumen measures:
सही उत्तर: घ) The distance in cm a standard briquette stretches before breaking
Ductility is the elongation of a standard bitumen briquette pulled at a specified speed and temperature before it breaks.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A bitumen emulsion is:
सही उत्तर: ख) Bitumen dispersed as fine droplets in water with an emulsifying agent
Emulsions allow bitumen to be applied cold and on damp surfaces; the water evaporates or the emulsion breaks, leaving bitumen.
💬 टिप्पणी / गल्ती रिपोर्ट (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)
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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