Life of steel sleepers is

 

(A) 20 to 30 years

 

(B) 30 to 40 years

 

(C) 40 to 50 years

 

(D) 50 to 60 years

On Indian Railways, number of a crossing is defined as

(A) tangent of angle of crossing

(B) contangent of angle of crossing

(C) consine of angle of crossing

(D) sine of angle of crossing

Two important constituents in the composition of steel used for rail are

(A) carbon and sulphur

(B) carbon and manganese

(C) carbon and silicon

(D) manganese and phosphorous

Heel divergence is

(A) always greater than flangeway clearance

(B) sometimes greater than flangeway clearance

(C) equal to flangeway clearance

(D) always less than flangeway clearance

The sleeper that needs the least maintenance is

(A) concrete sleeper

(B) cast iron sleeper

(C) steel sleeper

(D) wooden sleeper

Which one of the following rails is called Vignole rail?

(A) bull headed

(B) flat footed

(C) double headed

(D) none of these

Tensile strength of steel used in rails should not be less than

(A) 500 MPa

(B) 700 MPa

(C) 800 MPa

(D) 850 MPa

In India, the permissible limit of rail wear is

(A) 2%

(B) 3%

(C) 5%

(D) 10%

Narrow gauge is adopted where

(A) expected revenue earning is low

(B) acquisition of land is difficult

(C) terrain is hilly

(D) number of river crossings are more

In railways a triangle is mainly provided for

(A) changing direction of engines through 180°

(B) diverting trains from the main line to branch line

(C) shunting wagons in yards

(D) crossing over between parallel tracks

Ordinary rails are made of

(A) mild steel

(B) high carbon steel

(C) wrought iron

(D) cast iron