MCQ
401. সাধারণত কংক্রিটের কাঠামোর শতকরা কত ভাগ পূরক পদার্থ দ্বারা পূরণ করা হয়?
৬০-৬৫ভাগ
৭০-৭৫ ভাগ
৮০-৮৫ ভাগ
৯০-৯৫ ভাগ
402. Coefficient of curvature -
D30^2/ D20xD10
D10^2/ 060×D30
D20/D60×D20
D30^2/ D60×D10
403. Angle of internal friction 30° হলে coefficient of active earth pressure ?
3
1/3
1
1/2
404. Flat mild steel bearing plates are used--
For points and crossings in the lead portion
With wooden sleepers at locations where creep is likely to be developed
On all joints and curves
all the above
405. 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
406. Which of the following types of sleepers is preferred on joints?
CST-9 sleeper
Steel trough sleeper
Wooden sleeper
Concrete sleeper
407. Creep is the--
Longitudinal movement of rail
Lateral movement of rail
Vertical movement of rail
Difference in level of two rails
408. 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
409. Effective size কোনটি ?
D 10
D 30
D 60
D 90
410. Two important constituents in the composition of steel used for rail are--
Carbon and silicon
Manganese and phosphorous
Carbon and manganese
Carbon and Sulphur
411. একটি Soil নমুনার Voids volume Solids volume হলে porosity কত?
0.5
1.0
2.0
412. Composite sleeper index is the index of--
Hardness and strength
Strength and toughness
Toughness and wear resistance
Wear resistance and hardness
413. Water content 15%, sp, gravity -2.5 void ratio 0.5, Degree of Saturation -?
75%
4.50%
60%
80%
414. The type of spike used for fixing chairs of bull headed rails to wooden sleepers is--
Dog spike
Rail screw
Elastic spike
Round spike
415. Liquid limit নির্ণয়ে কোনটি ব্যবহৃত হয়?
Pyconmeter
Vicat Apparatus
Casagraande apparatus
Proctor apparatus
416. মোটাদানার পুরক পদার্থ সাধারণত কত নং চালুনী দ্বারা অতিক্রম করে না?
৪ নং চালুনি
৬ নং চালুনি
৮ নং চালুনি
১৬ নং চালুনি
417. 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
418. Staggered joints are generally provided--
On curves
On straight track
When two different rail sections are required to be joined
None of the above
419. Due to battering action of wheels over the end of the rails, the rails get bent down and are deflected at ends. These rails are called--
Roaring rails
Hogged rails
Corrugated rails
Buckled rails
420. 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