इन्जिनियरिङ सेवा सिभिल इन्जिनियर (सातौँ तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – सिभिल इन्जिनियर (सातौँ तह)
Civil Engineer – 7th 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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In a slump test, the concrete settles to a height of 230 mm after the 300 mm high cone is lifted. The slump is:
सही उत्तर: ग) 70 mm
Slump = height of cone − height of slumped concrete = 300 − 230 = 70 mm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Laminated veneer lumber (LVL) differs from plywood in that, in LVL, the grain of the veneers is:
सही उत्तर: ख) Mostly parallel to the length of the member
LVL veneers are laid mainly parallel, making it strong along its length for beams and headers; plywood uses crossed plies.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The weldability of structural steel generally decreases as its:
सही उत्तर: क) Carbon content (carbon equivalent) increases
Higher carbon equivalent makes the heat-affected zone harder and more prone to cracking, reducing weldability.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Gabions, widely used in Nepal for river training and retaining walls, are:
सही उत्तर: घ) Galvanised steel wire-mesh boxes filled with stones
Gabion boxes of galvanised (or PVC-coated) wire mesh filled with stones form flexible, permeable structures.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Calcium nitrite is added to concrete mainly as a:
सही उत्तर: ग) Corrosion inhibitor for the reinforcement
Calcium nitrite stabilises the passive film on steel, reducing chloride-induced corrosion.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Polycarboxylate ether (PCE) admixtures are a type of:
सही उत्तर: ख) High-range water reducer (superplasticiser)
PCE superplasticisers disperse cement particles by electrostatic and steric repulsion, allowing large water reductions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The flakiness index of coarse aggregate is determined by passing the particles through the slots of a:
सही उत्तर: क) Thickness gauge
The thickness gauge has slots of width 0.6 times the mean size; particles passing are flaky. The length gauge is used for elongation index.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As the maximum size of aggregate in a concrete mix is reduced, the total surface area of the aggregate:
सही उत्तर: घ) Increases, so more water and cement paste are needed to coat it
Smaller particles have a larger specific surface, increasing water and paste demand for the same workability.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In mass concrete such as dams, cracking due to the heat of hydration is controlled by measures such as:
सही उत्तर: ग) Using low-heat or blended cement, pre-cooling ingredients and placing in thin lifts
Reducing heat generation and the peak temperature limits the temperature difference that causes thermal cracking.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Retempering' of concrete, i.e. remixing it with additional water after it has begun to stiffen, is generally:
सही उत्तर: ख) Not permitted, as it lowers strength and durability
Adding water after initial stiffening raises the water-cement ratio and disturbs early hydration, so it is not allowed.
💬 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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