इन्जिनियरिङ सेवा असिस्टेन्ट सब-इन्जिनियर (चौथो तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – असिस्टेन्ट सब-इन्जिनियर (चौथो तह)
Assistant Sub-Engineer – 4th Level · Engineering Service
१,९४० 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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To counteract the dip of the magnetic needle in a compass, a small sliding weight is placed on the needle. It is called a:
सही उत्तर: घ) Rider
The rider is a small brass or silver coil on the needle that can be moved to balance the dip so that the needle stays horizontal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a compass traverse, the observed bearings are: AB 50°00', BA 230°00', BC 120°00', CB 302°00', CD 80°00'. Stations A and B are free from local attraction. The corrected bearing of CD is:
सही उत्तर: घ) 78°00'
BC (taken at B) is correct, so CB should be 300°00'; the observed 302°00' shows a +2° error at C. All bearings taken at C need −2°, so CD = 78°00'.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a prismatic compass, the graduated ring:
सही उत्तर: ख) Is attached to the magnetic needle and rotates with it
In the prismatic compass the ring is fixed to the needle, so it stays oriented to magnetic north while readings are taken through the prism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In chain surveying, which of the following is an obstacle to both chaining and ranging?
सही उत्तर: घ) A building
A building blocks both measurement and line of sight; a pond or river obstructs only chaining, and a hillock obstructs only ranging.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The French cross staff, an octagonal brass tube with slits on its faces, is used to set out:
सही उत्तर: क) Lines at 45° and 90° to a chain line
The slits on alternate faces of the French cross staff allow offsets at 45° as well as 90° to the chain line.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 30 m steel tape of cross-section 3 mm² (E = 2 × 10⁵ N/mm²) is used with a pull 50 N greater than the standard pull. The pull correction is:
सही उत्तर: ख) +2.5 mm
Cp = (P − P0)L/(AE) = 50 × 30/(3 × 2 × 10⁵) = 0.0025 m = 2.5 mm, additive since extra pull stretches the tape.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 30 m tape weighing 20 N in total is suspended between end supports under a pull of 100 N. Using Cs = W²L/(24P²), the sag correction is:
सही उत्तर: घ) 0.05 m (subtractive)
Cs = (20² × 30)/(24 × 100²) = 12000/240000 = 0.05 m; sag makes the measured length too long, so the correction is subtractive.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In viscosity-graded paving bitumen designated VG-30, the number 30 relates to:
सही उत्तर: ग) Its approximate absolute viscosity at 60°C (about 3000 poise)
VG grades are based on absolute viscosity at 60°C; VG-30 has a viscosity of about 2400–3600 poise.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bitumen can be distinguished from tar because bitumen is completely soluble in:
सही उत्तर: ख) Carbon disulphide
Bitumen is defined as a hydrocarbon material fully soluble in carbon disulphide; tar is only partly soluble.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The flash point test of bitumen is important mainly for:
सही उत्तर: ग) Safety during heating, since it is the temperature at which vapours momentarily ignite
Bitumen must not be heated above its flash point during mixing to avoid fire hazard.
💬 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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