आईओई इन्जिनियरिङ प्रवेश (त्रिवि) BE / B.Arch प्रवेश परीक्षा तयारी
आईओई इन्जिनियरिङ प्रवेश (त्रिवि) – BE / B.Arch प्रवेश परीक्षा
IOE BE / B.Arch Entrance · IOE Entrance (TU)
३,८४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
BE/B.Arch प्रवेश: 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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The moment of inertia of a thin uniform rod of mass M and length L about an axis through its centre making an angle θ with the rod is:
सही उत्तर: ग) (ML²/12) sin²θ
Each element at distance x from the centre is at perpendicular distance x sin θ from the axis, so I = ∫(x sin θ)² dm = (ML²/12) sin²θ.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A solid cylinder rolls without slipping down a rough incline. The force of static friction on it acts:
सही उत्तर: घ) up the incline
Gravity tends to make the contact point slide down; friction acts up the slope and provides the torque that makes the body spin up while rolling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The angular impulse acting on a rotating body is equal to the change in its:
सही उत्तर: घ) angular momentum
Angular impulse = ∫τ dt = ΔL, just as linear impulse equals change in linear momentum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A pump raises 10 kg of water per second through a height of 20 m and delivers it with a speed of 10 m/s. The power of the pump is (g = 10 m/s²):
सही उत्तर: ख) 2500 W
Power = (dm/dt)(gh + v²/2) = 10 × (200 + 50) = 2500 W.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A box lies on the floor of a truck that accelerates at 2 m/s². The minimum coefficient of static friction needed for the box not to slide is (g = 10 m/s²):
सही उत्तर: ग) 0.2
Friction must provide the box's acceleration: μmg ≥ ma, so μ ≥ a/g = 2/10 = 0.2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The slope of the momentum–time graph of a body gives the:
सही उत्तर: ख) net force acting on it
By Newton's second law, F = dp/dt, so the slope of a p–t graph is the net force.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a projectile launched with speed u up a plane inclined at angle α to the horizontal, the maximum range along the plane is:
सही उत्तर: ग) u²/(g(1 + sin α))
Range up the incline is maximised when the launch direction bisects the angle between the incline and the vertical, giving R_max = u²/(g(1 + sin α)).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A ball is dropped from a window of a train moving with uniform velocity on a straight track. Neglecting air resistance, to an observer standing on the ground the path of the ball is:
सही उत्तर: घ) a parabola
The ball keeps the train's horizontal velocity while falling freely, so a ground observer sees projectile (parabolic) motion; an observer in the train sees a vertical line.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The distance travelled by a uniformly accelerated body in the n-th second of its motion is given by:
सही उत्तर: ख) u + (a/2)(2n − 1)
sₙ = sₙ − sₙ₋₁ = [un + ½an²] − [u(n − 1) + ½a(n − 1)²] = u + (a/2)(2n − 1).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The number of significant figures in 6.0230 × 10²³ is:
सही उत्तर: क) 5
In scientific notation only the digits of the coefficient count; 6.0230 has five significant figures (the trailing zero after the decimal point counts).
💬 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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