Subtense bar is an instrument used for _______________?
A. Levelling
B. Measurement of horizontal distances in plane areas
C. Measurement of horizontal distances in undulated areas
D. Measurement of angles
Overturning of vehicles on a curve can be avoided by using ________________?
A. Compound curve
B. Vertical curve
C. Reverse curve
D. Transition curve
Different grades are joined together by a ________________?
A. Compound curve
B. Transition curve
C. Reverse curve
D. Vertical curve