निर्माण सामग्री – Construction Materials MCQ

निर्माण सामग्री: प्रश्न र उत्तर

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सही: ० / ०

471. Cold twisted deformed (CTD) bars obtain their higher yield strength mainly through:

     कStrain hardening caused by twisting the bars at room temperature खQuenching in water गAddition of chromium घAnnealing
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

472. 'Cupping' in a sawn timber board is:

     कA curvature along the length of the board खA spiral distortion गBending of the edge in its own plane घA curvature across the width of the board
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

473. In seasoning defects of timber, 'checks' differ from 'splits' in that checks:

     कExtend right through the piece from one face to the other खOccur only in hardwoods गAre longitudinal separations of fibres that do not extend through the whole thickness घAre caused by fungi
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

474. 'Blue stain' (sap stain) in timber is:

     कA discolouration of sapwood caused by fungi, with little loss of strength खA defect caused by termite attack गA crack caused by frost घA chemical used for preserving timber
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

475. When timber dries below its fibre saturation point, its shrinkage is:

     कGreatest along the grain (longitudinal) खGreatest in the tangential direction, less radially and negligible longitudinally गEqual in all directions घGreatest in the radial direction
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

476. During the burning of bricks, the stage at which the clay particles fuse together, giving the bricks strength and hardness, is called:

     कDehydration खOxidation गWeathering घVitrification
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

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     टिप्पणी जाँचपछि मात्र देखिन्छ।

477. In Portland slag cement as per Indian Standards, the proportion of granulated blast furnace slag permitted is:

     क25% to 70% ख5% to 10% ग80% to 95% घ10% to 25%
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

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     टिप्पणी जाँचपछि मात्र देखिन्छ।

478. In cement manufacture, the cooled clinker is finally:

     कBurnt again with coal खGround with a small quantity of gypsum in a ball (tube) mill गMixed with water and stored as slurry घWashed to remove lime
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

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     टिप्पणी जाँचपछि मात्र देखिन्छ।

479. Wire-cut bricks are produced by:

     कExtruding a continuous column of stiff clay through a die and cutting it into bricks with wires खHand moulding in sanded moulds गPressing dry clay powder at high pressure घCasting liquid clay in moulds
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

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     टिप्पणी जाँचपछि मात्र देखिन्छ।

480. Glazier's putty, used to fix glass panes in wooden frames, is a mixture of:

     कCement and sand खLime and surkhi गPlaster of Paris and water घWhiting (powdered chalk) and linseed oil
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।