0

Railway Engineering Mcqs

Q:

Find the steepest gradient on a 3 degree curve for a BG line with ruling gradient of 1 in 200.

A) 1 in 200 B) 1 in 432
C) 1 in 284 D) 1 in 263
 
Answer & Explanation Answer: D) 1 in 263

Explanation: Ruling gradient = 1 in 200 = 0.5%
Compensation = 0.04 x 3 = 0.12%
Compensated gradient = 0.5-0.12 = 0.38%
= 1 in 263.

View Answer Discuss

425
Q:

At what angle should a railway line cross a road?

A) 90° B) 30°
C) 60° D) 45°
 
Answer & Explanation Answer: A) 90°

Explanation: A railway line should always cross a road at 90° angle, i.e. they should be perpendicular to each other. This is done so that the passing train is clearly visible to the road passengers, thus avoiding accidents.

View Answer Discuss

382
Q:

Which of the following is not a requirement of a good ballast?

A) Tough B) Wear resistant
C) Rounded D) Cheap
 
Answer & Explanation Answer: C) Rounded

Explanation: Ballast should not be rounded. It should generally be cubical having sharp edges. This is regarding the shear strength provided by the Ballast.

View Answer Discuss

304
Q:

What is the limit for inward tilt at rail seat?

A) 1 in 15 to 1 in 25 B) 1 in 20 to 1 in 25
C) 1 in 15 to 1 in 20 D) 1 in 10 to 1 in 30
 
Answer & Explanation Answer: A) 1 in 15 to 1 in 25

Explanation: The limit for inward tilt at rail seat is from 1 in 15 to 1 in 25. The sleepers are termed defective otherwise.

View Answer Discuss

292
Q:

What is the objective of Final location survey?

A) To study the contour maps B) To prepare working details
C) To make accurate cost estimates D) To prepare working details and make accurate cost estimates
 
Answer & Explanation Answer: D) To prepare working details and make accurate cost estimates

Explanation: The Final location survey is done to prepare the working details for site work and to make accurate cost estimates if required. Studying of Contour maps is a part of the Reconnaissance survey.

View Answer Discuss

246
Q:

Which of the following equipment is not a part of Modern Surveying Instruments and techniques?

A) Infrared Beam B) Laser beam
C) Chain and Tape D) Computers
 
Answer & Explanation Answer: C) Chain and Tape

Explanation: Chain and Tape were previously used for measurement. With advancement of technologies they are considered to be out dated.

View Answer Discuss

230
Q:

What is the next step taken after the preliminary investigation of the rail line?

A) Laying of rail lines B) Formation of ballast
C) Surveying D) Testing of rail
 
Answer & Explanation Answer: C) Surveying

Explanation: After preliminary investigation it is important to know the gradients of the path on which rails are to be laid. The alignment, curves need to be calculated. For this purpose surveying is done after Preliminary investigation.

View Answer Discuss

225
Q:

The scrap value of concrete is _____

A) None B) High
C) Low D) Higher than wooden
 
Answer & Explanation Answer: A) None

Explanation: Concrete sleepers once used do not give any scrap value. Concrete once set hard cannot be remoulded into another shape. Thus these sleepers cannot be reused for any productive work.

View Answer Discuss

199