For preliminary sizing of angle sections subjected to tension and connected with bolts along the length of the end connection, the rupture strength of the net section is given by
\(T_{dn}=\alpha \frac{A_{n}f_{u}}{\gamma m_{1}}\)Match the correct values of a with the number of bolts in the connection.
α Number of bolts
1.0.9 A.one
2.0.8 B.two
3.0.7 C.three
4.0.6 D.four or more
Moment of Inertia about U–U axis is _________ cm4.
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A propped cantilever AB carries a uniformly distributed load of Q/unit length. In this condition the moment reaction MA=\(\frac{Q\iota ^{2}}{8}\). A clockwise moment MB is applied at B to make the slope of the detection curve equal to zero.Then the ratio of MA to MB is _______
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An ascending gradient of 1 in 100 meters meets descending gradient of 1 in 50, the length of summit curve required to provide overtaking sight distance of 500 m will be–
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The design speed for a two lane road is 55 km/hr. When a design vehicle with a wheel base of 6m is negotiating a horizontal curve on the road, the off tracking is measured as 0.096 m. The required widening of the carriageway of the two–lane road on the curve is approximately ________ m.
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The future population of a town by the geometric increase method for the year 2017 will be ______ thousands
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A wheeled tractor hauling unit is working on firm earth.The total loaded weight distribution of this unit is Drive wheel : 25000 kg
Scraper wheels : 20000 kg
If the coefficient of traction for wheeled tractor on firmear this 0.4, the rimpull which the tractor can exert without slipping is _________ kg.
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Solution
Rimpull = Coeff. of traction × weight of drive wheel
= 0.4× 25000
⇒10,000 kg
Two pressure tanks are built one inside the other as shown.The bourden gauges A and B connected to inner and outer tank read 10.36 atm and 101.325 atm respectively. An aneroid barometer reads 10.36 m of water. Then the absolute pressure inside the inner tank will be _________ m of Hg.
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Solution
Bourden gauge → Gauge pressure relative to surroundings
Aneroid Barometer → Local atmospheric pressure
Absolute pressure in inner tank = Local atm pressure + Reading of B + Reading of A
⇒ 10.36 m of water + 101.325 atm + 10.36 atm
⇒ 1 atm+ 101.325 atm + 10.36 atm
⇒ 112.685 atm
⇒ 112.685 × 760 mm of Hg
⇒ 85.640 m of Hg
The thickness of the laminar boundary layer on a flat plate at a point A is 3 cm and at a point B, 2m downstream of A is 5 cm. What is the distance of A from the leading edge of the plates?
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Solution
For maximum pressure use in sudden expansion in a pipe,the optimum ratio between the diameter of the pipe before expansion and diameter of the pipe after expansion will be
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