इन्जिनियरिङ सेवा सिभिल इन्जिनियर (सातौँ तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – सिभिल इन्जिनियर (सातौँ तह)
Civil Engineer – 7th Level · Engineering Service
१,५०३ 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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Prestressed concrete requires the use of:
सही उत्तर: ख) High-tensile steel and high-strength concrete
High-tensile steel is needed so that prestress remains effective after losses; high-strength concrete resists the high compressive stresses.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Steam curing is mainly used for:
सही उत्तर: घ) Precast concrete products, to gain strength quickly
Steam curing accelerates strength gain so that moulds can be reused quickly in precast factories.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ponding is a method of curing best suited for:
सही उत्तर: घ) Horizontal surfaces such as slabs and floors
In ponding, small bunds of mortar or clay retain a layer of water over horizontal slabs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lignosulphonates are commonly used in concrete as:
सही उत्तर: ग) Plasticisers (water-reducing admixtures)
Lignosulphonate-based admixtures are conventional water reducers/plasticisers.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Silica fume, used as a mineral admixture in high-strength concrete, is:
सही उत्तर: घ) An extremely fine by-product of silicon and ferrosilicon alloy production
Silica fume consists of very fine amorphous silica particles; it is a highly reactive pozzolan that densifies concrete.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 'maturity' of concrete, used to estimate strength development, is expressed as the:
सही उत्तर: ग) Sum of the products of curing time and temperature (above a datum temperature)
Maturity = Σ(time × temperature above a datum, about −11°C), commonly in °C-hours.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Powers' gel/space ratio theory relates the strength of concrete to the:
सही उत्तर: ग) Ratio of the volume of hydrated cement gel to the space available for it
Powers showed that strength depends on the gel/space ratio, i.e. how much of the available space is filled with hydration products.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If extra water is added at site to a concrete mix to make it more workable without adding cement, the result is:
सही उत्तर: क) Lower strength and durability of the hardened concrete
Extra water raises the water-cement ratio, which reduces strength and increases permeability and shrinkage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Over-vibration of a fairly wet concrete mix tends to cause:
सही उत्तर: क) Segregation and excessive bleeding
Prolonged vibration makes heavy aggregates sink and water and fines rise, causing segregation and bleeding.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The vibrator that is inserted directly into fresh concrete to compact it is called a/an:
सही उत्तर: ख) Needle (immersion) vibrator
An immersion or needle vibrator is dipped into the concrete; surface and form vibrators act from outside.
💬 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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