526. For determining the forces in the members of a truss by graphic statics, the method of substitution will be required in the case of
527. A Rankine (oval) half-body PP is subjected to a two-dimen-sional flow (x, y coordinate directions from origin O) with uniform velocity V, resulting in typical streamlines as shown in the figure by dotted lines. The point A on the body surface is
528. A projectile is fired horizontally with a velocity of 6 m/s from a point of height h m above and 12 m away from an object. What is the value of h required so that projectile hits the object ?
529. Which of the following organisations keep a check on prices of essential commodities?
530. A car negotiates a curve on a slippery road at a constant speed of 10 m/s. If the coefficient of friction is 0.5, what is the minimum radius of the arc in which the car can turn ?
531. Grid lines on a mapsheet can be plotted mechanically by means of a
532. A municipal sewage has BOD5 of 200 mg/l. It is proposed to treat it and dispose off into a marine environment. For what minimum efficiency should the sewage treatment plant be designed ?
533. As the state of strain of an element of dense sand changes from plain strain to trivial condition, the effective angle of internal friction :
534. The force in member 1 of the truss shown in the given figure is
535. High alumina cement is produced by fusing together a mixture of
536. Which of the following relates to an economic grouping of developing countries formed in 1990?
537. Consider the following statements :
Ventilation of sewer lines is necessary to
1. avoid building up to sewer gases.
2. ensure atmospheric pressure in the waste water surface.
3. ensure the safety of sewer maintenance people.
4. provide oxidation facility to sewage.
Which of these statements are correct ?
538. For fish habitat in a river, the minimum dissolved oxygen required is
539. A clay soil specimen when tested in unconfined condition gave an unconfined compressive strength of 100 kN/m2. A specimen of the same clay with the same initial condition is subjected to a UU triaxial test under a cell pressure of 100 kN/m2. The axial stress (in kN/m2) at failure would be
540. A propped cantilever of span 4 m is fixed at A and propped at B. The beam carries a u.d.l. of 1 t/m over the entire span. The reaction at B is
541. The spacing of tile drains to relieve water-logged land is directly proportional to the
542. Four bolts share the load P as shown in the figure. The shearc strength of bolt is 30 kN and tension strength of bolt is 40 kN. Which one of the following is the value of P ?
543. The object of chain and cross-staff survey is to
1. locate the boundaries of an area.
2. plot the figure to a scale.
3. find the area of the plot.
4. find the reduced levels of the plot.
Which of the above statements is/are correct ?
544. A pipeline of 5 cm diameter is reduced abruptly to 2.5 cm diameter at a section to enable measurement of the water flowing through it. The loss of head at the contraction is 0.5 m. Given that, in metric units, 2 g = 4.43 and g = 3.132, the mean velocity in the reduced section will be
545. A clay layer, 5 m thick undergoes 50% consolidation in 5 years when subjected to an average pressure increase of 50 kN/m2. If the clay layer were 10 m thick, in what period would it undergo 50% consolidation for the same pressure ?
546. Which one of the following is the most preferred wood for high quality and durable furniture ?
547. For ornamental work, which type(s) of bricks is/ are preferred ?
1. Silica bricks
2. Silica lime bricks
3. Bricks produced in autoclaves
Select the correct answer using the code given below :
548. In case of footing on the surface of shallow depth is very dense sand, which one of the following types of failure is likely to occur?
549. For one cubic metre of brick masonry, the number of modular bricks needed is
550. To produce low heat cements, it is necessary to reduce the compound