सर्भेक्षण – Surveying MCQ
सर्भेक्षण – सिभिल इन्जिनियरिङ
Surveying · Civil Engineering · १,५६५ प्रश्न
१,५६५ प्रश्न उपलब्ध। मोड छान्नुहोस्:
सर्भेक्षण: 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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A transition curve is inserted between a straight and a circular curve mainly to:
सही उत्तर: ख) Introduce curvature and superelevation gradually
A transition curve gradually changes radius from infinity to R, allowing smooth introduction of centrifugal force and superelevation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Plane table surveying is a method in which:
सही उत्तर: क) Field observations and plotting are done simultaneously
In plane tabling, the map is plotted in the field as observations are made, so no field book is needed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Rankine's method of setting out a circular curve uses:
सही उत्तर: क) Tangential (deflection) angles with a theodolite and a chain or tape
Rankine's method sets out successive chords using deflection angles from the tangent measured with a theodolite plus chord lengths.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a simple circular curve of radius R and deflection angle Δ, the length of the long chord is:
सही उत्तर: क) 2R sin(Δ/2)
Long chord = 2R sin(Δ/2); R tan(Δ/2) is tangent length and R(1 − cos(Δ/2)) is mid-ordinate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The degree of a curve (arc definition) is the angle subtended at the centre by an arc of standard length. As the radius increases, the degree of curve:
सही उत्तर: ख) Decreases
Degree of curve is inversely proportional to radius; flatter curves (larger R) have smaller degree.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Transiting (plunging) a theodolite means:
सही उत्तर: ग) Rotating the telescope about its horizontal axis through 180° in the vertical plane
Transiting reverses the telescope end-for-end by turning it about the trunnion (horizontal) axis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The method of measuring several angles at a station successively by closing the horizon is called:
सही उत्तर: ग) Reiteration (direction) method
In the reiteration method, angles are measured in succession around the station and the horizon is closed for a check.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An echo sounder measures water depth by:
सही उत्तर: ग) Timing the return of a sound pulse from the bed
Depth = (velocity of sound in water × time for the echo) / 2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Depth measurements of water bodies in hydrographic surveying are called:
सही उत्तर: ख) Soundings
Soundings are measurements of water depth, made with a sounding rod, lead line or echo sounder.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A theodolite measures:
सही उत्तर: ख) Horizontal and vertical angles
A theodolite measures both horizontal and vertical angles and can also be used for ranging, levelling and tacheometry.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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