निर्माण सामग्री – Construction Materials MCQ

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

681. Bamboo, widely used for scaffolding and rural construction in Nepal, is botanically:

     कAn endogenous grass खA hardwood with distinct annual rings गAn exogenous conifer घA softwood with resin canals
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

682. Trees that grow by adding new layers outward each year, forming annual rings, are called:

     कExogenous trees खHerbaceous trees गEndogenous trees घMonocot trees
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

683. The main advantage of kiln seasoning of timber over air seasoning is that it:

     कIs quick and allows controlled moisture content खIncreases the weight of timber गRequires no equipment घCosts nothing
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

684. Water seasoning of timber involves:

     कSpraying water on timber in a kiln खImmersing logs in running water for some weeks to wash out the sap, then air drying गKeeping timber in still sea water for years घBoiling the timber in water for several hours
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

685. Foxiness in timber is indicated by:

     कSplits at the ends of planks खRed or yellow tinge in the wood due to decay from poor ventilation during storage or over-maturity गLarge dead knots घWhite spots caused by insects
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

686. 'Rind galls' in timber are:

     कCracks along the annual rings खTunnels made by marine borers गCurved swellings formed where branches were improperly cut off and the wound later grew over घDark spots caused by fungi
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

687. Twisted fibres (wandering heart) in timber are mainly caused by:

     कExcessive sap in the wood खTwisting of the young tree by strong prevailing winds गAttack of dry rot fungus घOver-seasoning in a kiln
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

688. 'Upsets' in timber are defects caused by:

     कCrushing of fibres across the grain due to improper felling or shock in the growing tree खFungal attack in damp conditions गInsects boring tunnels घRapid drying of the surface
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

689. A wane in sawn timber is a defect in which:

     कA ring-shaped crack appears खThe fibres are crushed by external force गThe timber is attacked by termites घPart of the original rounded surface (bark) remains on the edge of the piece
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

690. CGI sheets, widely used for roofing in Nepal, are:

     कColoured gypsum interlocking sheets खCompressed glass-fibre insulation sheets गCement glass insulated sheets घCorrugated galvanised iron (steel) sheets
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।