CTEVT डिप्लोमा इन्जिनियरिङ डिप्लोमा इन सिभिल/कम्प्युटर/इलेक्ट्रिकल प्रवेश तयारी
CTEVT डिप्लोमा इन्जिनियरिङ – डिप्लोमा इन सिभिल/कम्प्युटर/इलेक्ट्रिकल प्रवेश
CTEVT Diploma Entrance · CTEVT Diploma in Engineering
१,५७१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CTEVT डिप्लोमा इन्जिनियरिङ प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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The main constituent of natural gas (and biogas) is:
सही उत्तर: क) Methane
Methane (CH₄) is the major component of natural gas and biogas. LPG used in cooking cylinders is mainly butane and propane.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The hardest naturally occurring substance is:
सही उत्तर: ग) Diamond
Diamond is an allotrope of carbon in which each carbon atom is bonded to four others in a rigid 3-D network. Graphite, another allotrope of carbon, is soft and slippery.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Rusting of iron requires the presence of:
सही उत्तर: क) Both oxygen and water
Iron rusts to hydrated iron(III) oxide only when both air (oxygen) and moisture are present. Iron kept in dry air or in boiled, oil-covered water does not rust.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of coating iron with a layer of zinc to prevent rusting is called:
सही उत्तर: घ) Galvanization
Galvanization protects iron because zinc is more reactive and corrodes in preference to iron. Vulcanization is the hardening of rubber with sulphur.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The most abundant gas in the Earth's atmosphere is:
सही उत्तर: ग) Nitrogen
Nitrogen makes up about 78% of air by volume, while oxygen makes up about 21%. Carbon dioxide is only about 0.04%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The gas that turns lime water milky is:
सही उत्तर: ख) Carbon dioxide
CO₂ reacts with lime water Ca(OH)₂ to form insoluble calcium carbonate, making it milky. Hydrogen is tested by a 'pop' sound with a burning splint.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The gas evolved when a metal like zinc reacts with dilute hydrochloric acid is:
सही उत्तर: क) Hydrogen
Zn + 2HCl → ZnCl₂ + H₂; active metals displace hydrogen from dilute acids. Carbon dioxide is released when acids react with carbonates.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction between an acid and a base to form salt and water is called:
सही उत्तर: घ) Neutralization
Acid + base → salt + water is a neutralization reaction, for example HCl + NaOH → NaCl + H₂O. Antacids neutralize excess stomach acid this way.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Acids turn blue litmus paper:
सही उत्तर: ग) Red
Acids turn blue litmus red, while bases turn red litmus blue. Phenolphthalein stays colourless in acids and turns pink in bases.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A solution with pH less than 7 is:
सही उत्तर: ख) Acidic
On the pH scale, values below 7 are acidic, 7 is neutral and above 7 is basic. Pure water at 25 °C has pH 7.
💬 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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