42501. For holding a rail in position, no chairs are used for
42502. Distance between the inner rail and check rail provided on sharp curve, is
42503. Coal ash (or cinder) is used in initial stages of a new construction of railway for
42504. Pot sleepers are in the form of
42505. In railways a triangle is mainly provided for
42506. A kink is made in stock rails, ahead of the toe of switch at a distance of
42507. Rails are bent to correct curvature if the degree of curve, is more than
42508. In India the rails are manufactured by
42509. Rail section first designed on Indian railways, was
42510. A scissors cross-over consists of
42511. To prevent percolation of water into formation, moorum is used as a blanket for
42512. Distance between inner faces of the flanges, is kept
42513. Wooden sleepers used on the girders of bridges, are generally made of
42514. If D is distance between centres of two parallel track of gauge G, then, total length of cross-over (from the point of commencement to the point of termination) with an intermediate straight portion and N crossing, is given by
42515. If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is
42516. Overall depth of a dog spike, is
42517. Best wood for wooden sleepers is
42518. The rail section which is not used on Indian metre gauge tracks, is
42519. Dimensions of a plate girder, are :
42520. Rail joint supported on a single sleeper, is known
42521. Maximum wheel base distance provided on Indian B.G. tracks, is
42522. The tread of wheels is provided an outward slope of
42523. On a straight railway track, absolute levels at point A on two rails are 100.550 m and 100.530 m and the absolute levels at point B 100 m apart are 100.585 m and 100.515 m respectively, the value of twist of rails per metre run, is
42524. Bearing plates are used to fix
42525. A welded rail joint is generally
42526. Safe speed (V) on a curve of radius 970 metres provided with two transition curves on Board Gauge track, is
42527. Two pipe systems can be said to be equivalent,when the following quantities are same:
42528. If α is switch angle and R is radius of the turnout, the length of the tongue rail, is
42529. The quantity of stone ballast required per metre tangent length, is
42530. The type of switch generally used for B.G. and M.G. tracks, is
42531. For flat bottom sleepers, maximum size of ballast, is
42532. Coning of wheels
42533. The sleepers which satisfy the requirements of an ideal sleeper, are
42534. Arrangement made to divert the trains from one track to another, is known as
42535. At a rail joint, the ends of adjoining rails, are connected with a pair of fish plates and
42536. Width of the top portion of a flat footed, rail, is
42537. For providing the required tilt of rails, adazing of wooden sleepers, is done for
42538. The life of a wooden sleeper depends upon
42539. The spread between the point and splice rails at a distance of 4.25 rn is 50 cm. The size of the crossing is
42540. Minimum packing space provided between two sleepers, is between
42541. The overall length of a turn out is the distance between the end of stock rail and
42542. According to Railway Board, no diamond crossing should be flatter than
42543. Coning of wheels is provided
42544. A scissors cross over consists of one diamond and
42545. For pipes,transition flow occurs when Reynolds number is:
42546. Heel divergency, the distance between the running faces of stock rail and gauge face of tongue rail, as recommended for Indian B.G. tracks, is
42547. Type of switch rails generally adopted for modern track, is
42548. If sleeper density is M + 7 for 13 m rails, the minimum depth of ballast under wooden sleepers (25 cm x 13 cm), is
42549. By interchanging gibs and cotters of a pot sleeper, gauge may be slackened by
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