इन्जिनियरिङ काउन्सिल (NEC) – Engineering Council (NEC) MCQ
इन्जिनियरिङ काउन्सिल (NEC) – लाइसेन्स परीक्षा
Engineering Council (NEC) · Nepal Professional License Exams · ५९७ प्रश्न
५९७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
इन्जिनियरिङ काउन्सिल (NEC): 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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In a rectangular open channel, when the specific energy is a minimum the critical depth equals:
सही उत्तर: क) Two-thirds of the specific energy
At critical flow in a rectangular channel the velocity head equals yc/2, so E = 1.5yc, i.e. yc = (2/3)E.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Francis turbine is best described as a:
सही उत्तर: ग) Reaction turbine suited to medium heads, with mixed (inward radial to axial) flow
The Francis turbine is a reaction turbine for medium heads; Pelton is impulse (high head) and Kaplan is axial reaction (low head).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When pipes are connected in parallel between two points, which quantity is the same for each pipe?
सही उत्तर: ख) Head loss
In parallel pipes the total discharge divides among the branches, but the head loss between the common junctions is the same for every branch.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The head loss at the sharp-edged entrance from a reservoir into a pipe is usually taken as:
सही उत्तर: घ) 0.5V²/2g
The entrance loss coefficient for a sharp-edged (square) entrance is about 0.5, giving 0.5V²/2g.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In pipe flow, the energy gradient line (total energy line) lies above the hydraulic gradient line by an amount equal to the:
सही उत्तर: क) Velocity head V²/2g
The HGL represents p/γ + z, while the EGL adds the velocity head V²/2g.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A pressure gauge reads 150 kPa where the local atmospheric pressure is 101.3 kPa. The absolute pressure is:
सही उत्तर: ग) 251.3 kPa
Absolute pressure = gauge pressure + atmospheric pressure = 150 + 101.3 = 251.3 kPa.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Newtonian fluid is one in which the shear stress is:
सही उत्तर: ख) Directly proportional to the rate of shear strain (velocity gradient)
Newton's law of viscosity τ = μ du/dy holds for Newtonian fluids such as water and air.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Swedish slip circle method is used for:
सही उत्तर: घ) Analysing the stability of slopes
The Swedish (method of slices) approach assumes a circular slip surface and compares resisting and disturbing moments to find the factor of safety of a slope.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a homogeneous earth dam, the top flow line of seepage (phreatic line) is approximately a:
सही उत्तर: क) Parabola
Kozeny and Casagrande showed the phreatic line is approximately a basic parabola, corrected at the upstream face.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the IS standard Proctor (light compaction) test, the rammer used has a mass of:
सही उत्तर: ख) 2.6 kg with a 310 mm drop
Light compaction uses a 2.6 kg rammer falling 310 mm; heavy (modified) compaction uses 4.89 kg falling 450 mm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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