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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Khosla's theory for the design of weirs on permeable foundations improved on Bligh's creep theory mainly by:
सही उत्तर: ख) Considering the exit gradient and actual seepage flow pattern, not creep length alone
Khosla used potential flow (method of independent variables) to compute uplift and showed that a safe exit gradient governs piping, not merely creep length.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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To avoid tension at the heel of a gravity dam, the resultant of all forces at the base must pass:
सही उत्तर: ग) Within the middle third of the base
If the resultant lies within the middle third, the base pressure is compressive throughout (no tension).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Muskingum method is used in hydrology for:
सही उत्तर: ग) Routing a flood hydrograph through a river reach
Muskingum routing uses prism and wedge storage (S = K[xI + (1 − x)O]) to route floods along channels.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A flood has a return period of 10 years. The probability that it will occur at least once in the next 2 years is:
सही उत्तर: क) 0.19
P = 1 − (1 − 1/T)ⁿ = 1 − (0.9)² = 1 − 0.81 = 0.19.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A double mass curve analysis of rainfall data is used to:
सही उत्तर: घ) Check and adjust the consistency of a rain gauge record
Cumulative rainfall at a station is plotted against cumulative mean of surrounding stations; a break in slope reveals inconsistency, which is then corrected.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Thiessen polygon method in hydrology is used to compute the:
सही उत्तर: ख) Mean areal rainfall over a catchment from point rain gauge data
Each gauge is given a weight equal to the area of its Thiessen polygon, and the weighted average gives mean rainfall over the basin.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The water surface profile formed upstream of a dam or weir in a mild-slope channel, where the depth exceeds the normal depth, is the:
सही उत्तर: घ) M1 (backwater) profile
On a mild slope with y > yn > yc, the gradually varied flow profile is M1, the familiar backwater curve behind dams.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Weber number represents the ratio of inertia force to:
सही उत्तर: ख) Surface tension force
Weber number relates inertia to surface tension; Reynolds uses viscous, Froude gravity and Mach elastic forces.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Buckingham's π theorem, a physical problem involving n variables with m fundamental dimensions can be expressed in terms of how many dimensionless groups?
सही उत्तर: ग) n − m
Buckingham's theorem gives (n − m) independent dimensionless π terms.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Chezy's formula for the mean velocity of uniform flow in an open channel is:
सही उत्तर: घ) V = C √(RS)
Chezy's formula is V = C√(RS), where C is Chezy's coefficient, R the hydraulic radius and S the bed slope.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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