MCQ
521. Two important constituents in the composition of steel used for rail are--
Carbon and silicon
Manganese and phosphorous
Carbon and manganese
Carbon and Sulphur
522. Type of switch rails generally adopted for modern track, is--
Straight switch
Curved switch
Loose heel switch
Bent switch
523. The main function of a fish plate is--
To join the two rails together
To join rails with the sleeper
To allow rail to expand and contract freely
None of the above
524. On Indian Railways, number of a crossing is defined as--
Sine of angle of crossing
Cosine of angle of crossing
Tangent of angle of crossing
Contingent of angle of crossing
525. Consider the following statements about concrete sleepers. 1. They improve the track modulus. 2. They have good scrap value. 3. They render transportation easy. 4. They maintain the gauge quite satisfactorily. Of these statements--
1 and 2 are correct
2 and 3 are correct
3 and 4 are correct
1 and 4 are correct
526. Which of the following types of sleepers is preferred on joints?
CST-9 sleeper
Steel trough sleeper
Wooden sleeper
Concrete sleeper
527. If n is length of a rail in metres, the number of sleepers per rail length generally varies from--
n to (n+2)
(n+2) to (n+4)
(n+3) to (n+6)
(n+4) to (n+5)
528. Total effective bearing area of both the bowls of a pot sleeper, is-
Slightly more than that of a wooden sleeper
Slightly less than that of a wooden sleeper
Equal to that of a wooden sleeper
None of these
529. Pick up the incorrect statement from the following-
Sleepers hold the rails at proper gauge on straights
Sleepers provide stability to the permanent way
Sleepers act as an elastic cushion between rails and ballast
None of these
530. Normally maximum cant permissible in Meter Gauge is--
75 mm
90 mm
140 mm
165 mm
531. Clay soil-t particle size silt-এর চেয়ে-
বড়
ছোট
সমান
কোনোটিই নয়
532. Void ration (e) এবং Porosity (n) এর সম্পর্ক কিরূপ?
n= 1 +e/1-e
n = 1+n/1-n
n = e/1 – e
n = n/1-n
533. For providing the required tilt of rails, adazing of wooden sleepers, is done for--
Bull headed rails
Double headed rails
Flat footed rails
Any type of rails
534. Angle of internal friction 30° হলে coefficient of active earth pressure ?
3
1/3
1
1/2
535. Pandrol clips cannot be used with--
Wooden sleepers
Concrete sleepers
CST-9 sleepers
Steel trough sleepers
536. Coefficient of curvature -
D30^2/ D20xD10
D10^2/ 060×D30
D20/D60×D20
D30^2/ D60×D10
537. Constant head premeameter দিয়ে কোন ধরনের soil-এ permeability নির্ণয় করা হয়।
course sand
fine sand
sit
clay
538. The purpose of providing fillet in a rail section is to--
Increase the lateral strength
Increase the vertical stiffness
Avoid the stress concentration
Reduce the wear
539. Pick up the correct statement from the following:--
An extra width of 7.5 cm ballast is provided on outside a curve if track is laid with short welded rails
An extra width of 7.5 cm ballast is provided on outside a curve sharper than 3° on B.G. and M.G. tracks
An extra width of 15 cm ballast is provided on each shoulder if the track is laid with welded rails
All the above
540. Flange-way clearance is the distance--
Between the adjoining faces of the running rail and the check rail near the crossing
Between the gauge faces of the stock rail and the tongue rail
Through which the tongue rail moves laterally at the toe of the switch
None of the above