सिभिल इन्जिनियरिङ

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

2991. Corrosion of reinforcement causes cracking and spalling of concrete cover mainly because:

      कRust increases the strength of steel खRust dissolves the cement paste गRust makes the steel contract घThe rust formed occupies a much larger volume than the original steel
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2992. Hardening of steel is done by heating it above the critical temperature and then:

      कCooling it in still air खCooling it very slowly in the furnace गCooling it rapidly by quenching in water or oil घKeeping it at that temperature for several days
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2993. A TMT reinforcing bar, as a result of quenching followed by self-tempering, has:

      कA uniform soft structure throughout खA hard tempered martensite outer rim and a soft, ductile ferrite-pearlite core गA hard core and a soft outer surface घA twisted surface produced by cold working
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2994. CRS bars used as reinforcement in aggressive environments are:

      कCorrosion resistant steel bars खCold rolled stainless bars only गCarbon reinforced strands घConcrete rebar spacers
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2995. The suffix 'D' in reinforcement grades such as Fe 500D indicates bars with:

      कLower yield strength than Fe 500 खLarger diameter गDeformed ribs only घHigher ductility, with greater elongation and stricter limits on sulphur and phosphorus
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2996. As per IS 1786, the minimum ultimate tensile strength of Fe 415 reinforcing bars is:

      क250 N/mm² ख415 N/mm² ग485 N/mm² घ700 N/mm²
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2997. The steel-making furnace that uses mainly steel scrap as its charge, melted by electricity, is the:

      कBlast furnace खElectric arc furnace गCupola furnace घLime kiln
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2998. Timber is weakest when loaded in:

      कTension perpendicular to the grain खTension parallel to the grain गCompression parallel to the grain घBending along the grain
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2999. Glulam (glued laminated timber) consists of:

      कTimber reinforced with steel bars खThin veneers glued with grains at right angles गWood fibres pressed into sheets घSeveral layers of dimension lumber glued together with grains parallel to form large structural members
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

3000. Charring the lower ends of wooden posts before embedding them in the ground is done to:

      कMake them easier to paint खIncrease their tensile strength गProtect them from decay and insects by forming a carbonised layer घReduce their weight
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।