# Railway Engineering Questions and Answers – Compound Curve and Reverse Curve

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This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Compound Curve and Reverse Curve”.

1. How is a compound curve formed?
a) By a circular curve and straight line
b) By 2 circular curves of same radii
c) By 2 circular curves of different radii
d) By more than 2 curves

Explanation: A compound curve is formed when two circular curves having different radii are combined. They have a common transition curve between them.

2. Length of transition curve connecting two circular curves can be calculated by L=0.008(Ca1-Ca2)xV.
a) True
b) False

Explanation: For calculating the Length of transition curve connecting two circular curves, firstly L=0.008(Ca1–Ca2)xV and L = (Cd1 – Cd2) x V are calculated. The greater among these is taken as the length of curve.

3. Which curve is formed by the combination of 2 circular curves with opposite curvatures?
a) Compound curve
b) Reverse curve
c) Double circular curve
d) Transition curve

Explanation: Compound curve has both the circular curves with same direction of curvature. In Reverse curve two circular curves with opposite curvatures are combined with a common transition curve.
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4. In case of high speed A and B routes minimum length of 30m should be kept between the 2 curves constituting a reverse curve.
a) True
b) False

Explanation: For high speed A and B routes minimum 50m should be kept between the two curves constituting a reverse curve. For high speed MG route it can be 30m.

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