सडक तथा यातायात इन्जिनियरिङ – Highway & Transportation MCQ
सडक तथा यातायात इन्जिनियरिङ – सिभिल इन्जिनियरिङ
Highway & Transportation · Civil Engineering · ४०७ प्रश्न
४०७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
सडक तथा यातायात इन्जिनियरिङ: 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 Double Bituminous Surface Treatment (DBST) consists of:
सही उत्तर: क) Two successive applications of bitumen spray each followed by a layer of chippings
DBST is a common low-cost wearing surface in Nepal: binder spray + chips, then a second binder spray + smaller chips, each rolled.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Otta seal, used on some low-volume roads in Nepal, is a surface treatment that uses:
सही उत्तर: ख) Relatively soft binder with graded natural aggregate, rolled and trafficked into a durable surface
Otta seal spreads a graded (often natural, locally available) aggregate over a fairly soft bitumen binder; rolling and traffic work the binder up through the aggregate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In water bound macadam (WBM) construction, the voids in the compacted coarse aggregate are filled with:
सही उत्तर: घ) Screenings and binding material with water, followed by rolling
WBM is built by rolling coarse aggregate, applying screenings and binding material, sprinkling water and rolling until a firm layer forms.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The concept of Equivalent Single Wheel Load (ESWL) is used to:
सही उत्तर: घ) Represent a dual-wheel assembly by a single wheel causing the same stress or deflection
ESWL is the load on a single wheel (same contact pressure) that produces the same maximum stress or deflection at a given depth as the dual wheels.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The stresses in a cement concrete pavement slab caused by the temperature difference between its top and bottom surfaces are called:
सही उत्तर: घ) Warping stresses
A temperature gradient makes the slab try to curl; restraint by its own weight produces warping stresses.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Contraction joints in cement concrete pavements are provided mainly to:
सही उत्तर: ग) Control cracking due to shrinkage and temperature fall
Contraction joints (sawn grooves) create planes of weakness so that shrinkage cracks form at predetermined locations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Westergaard's analysis of wheel load stresses in rigid pavements, the three critical load positions considered are:
सही उत्तर: क) Interior, edge and corner
Westergaard derived stress formulas for interior, edge and corner loading; IRC 58 checks edge and corner stresses in design.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a plate bearing test for rigid pavement design, a pressure of 0.7 kg/cm² produces the standard settlement of 0.125 cm. The modulus of subgrade reaction is:
सही उत्तर: घ) 5.6 kg/cm³
k = p/Δ = 0.7/0.125 = 5.6 kg/cm³ (pressure corresponding to 1.25 mm settlement).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a flexible pavement, the granular sub-base layer mainly serves to:
सही उत्तर: ख) Distribute load to the subgrade and provide drainage
The sub-base spreads stresses over the weaker subgrade, acts as a drainage layer and prevents intrusion of subgrade fines.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Vehicle Damage Factor (VDF) used in flexible pavement design is:
सही उत्तर: ख) The number of standard axles equivalent to one commercial vehicle
VDF converts the mixed commercial traffic into equivalent standard axle repetitions using the fourth power law.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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