इन्जिनियरिङ सेवा सब-इन्जिनियर (पाँचौँ तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – सब-इन्जिनियर (पाँचौँ तह)
Sub-Engineer – 5th Level · Engineering Service
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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Using Manning's formula, the velocity in a channel with n = 0.02, hydraulic radius 1.0 m and bed slope 0.0004 is:
सही उत्तर: ख) 1.0 m/s
V = (1/n) R^(2/3) S^(1/2) = 50 × 1 × 0.02 = 1.0 m/s.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a homogeneous earth dam, the phreatic (seepage) line is approximately a:
सही उत्तर: घ) Parabola
Casagrande's method approximates the phreatic line in a homogeneous earth dam as a base parabola.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The φ-index in hydrology is:
सही उत्तर: ख) The average rate of infiltration above which rainfall volume equals runoff volume
The φ-index is the constant loss rate such that rainfall in excess of it equals the observed runoff.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The specific energy of flow in a channel with depth 1.5 m and mean velocity 3 m/s (g = 9.81 m/s²) is about:
सही उत्तर: क) 1.96 m
E = y + V²/2g = 1.5 + 9/19.62 ≈ 1.96 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A draft tube is used in reaction turbines mainly to:
सही उत्तर: क) Recover kinetic energy at the runner exit and allow the turbine to be set above tail water
The diverging draft tube converts exit kinetic energy into pressure energy and maintains a suction head.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When pipes are connected in parallel, which quantity is the same for each pipe?
सही उत्तर: घ) Head loss
Parallel pipes join the same two junctions, so the head loss across each is equal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The head loss due to sudden enlargement of a pipe from velocity V1 to velocity V2 is:
सही उत्तर: क) (V1 − V2)²/2g
Applying momentum and energy equations gives the Borda–Carnot loss (V1 − V2)²/2g.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a given discharge in an open channel, specific energy is minimum when the flow depth is:
सही उत्तर: ग) Critical depth
The minimum point of the specific energy curve occurs at critical depth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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To avoid tension at the heel of a gravity dam, the resultant force must pass through the:
सही उत्तर: ग) Middle third of the base
When the resultant falls within the middle third of the base, no tension develops.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a non-recording type rain gauge?
सही उत्तर: घ) Symon's rain gauge
Symon's gauge only collects rainfall that is measured manually, so it is non-recording.
💬 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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