इन्जिनियरिङ सेवा असिस्टेन्ट सब-इन्जिनियर (चौथो तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – असिस्टेन्ट सब-इन्जिनियर (चौथो तह)
Assistant Sub-Engineer – 4th Level · Engineering Service
१,९४० प्रश्न उपलब्ध। मोड छान्नुहोस्:
प्राविधिक पत्र: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ५ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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A chemical commonly used for anti-termite treatment of soil under building foundations is:
सही उत्तर: ग) Chlorpyrifos
Soil under and around foundations is treated with termiticides such as chlorpyrifos emulsion to form a chemical barrier.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Burnett's process of timber preservation uses a solution of:
सही उत्तर: क) Zinc chloride
Burnett's process impregnates timber with zinc chloride solution, which is toxic to fungi and insects.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bamboo, widely used for scaffolding and rural construction in Nepal, is botanically:
सही उत्तर: क) An endogenous grass
Bamboo is a giant grass with endogenous growth, showing no annual rings, and is strong and flexible for its weight.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Trees that grow by adding new layers outward each year, forming annual rings, are called:
सही उत्तर: क) Exogenous trees
Exogenous trees increase in girth by adding rings outward and supply most engineering timber; endogenous trees like bamboo and palm grow inward/lengthwise.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main advantage of kiln seasoning of timber over air seasoning is that it:
सही उत्तर: क) Is quick and allows controlled moisture content
In a kiln, temperature and humidity are controlled, so timber can be dried quickly and uniformly to the desired moisture content.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Water seasoning of timber involves:
सही उत्तर: ख) Immersing logs in running water for some weeks to wash out the sap, then air drying
Running water removes sap from the wood, after which the timber is air dried; this reduces subsequent decay and insect attack.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Foxiness in timber is indicated by:
सही उत्तर: ख) Red or yellow tinge in the wood due to decay from poor ventilation during storage or over-maturity
Foxiness is an early sign of decay, shown by reddish or yellowish spots, often from storage in poorly ventilated conditions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Rind galls' in timber are:
सही उत्तर: ग) Curved swellings formed where branches were improperly cut off and the wound later grew over
Rind galls develop as the tree grows over wounds left by broken or badly cut branches, producing weak spots.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Twisted fibres (wandering heart) in timber are mainly caused by:
सही उत्तर: ख) Twisting of the young tree by strong prevailing winds
Wind constantly twisting the young tree makes the fibres spiral, so the timber cannot be sawn without cutting across the fibres.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Upsets' in timber are defects caused by:
सही उत्तर: क) Crushing of fibres across the grain due to improper felling or shock in the growing tree
Upsets (rupture) result from fibres being crushed, often by careless felling or impact, weakening the timber.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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