120. The wall constructed for the stability of a back filling portion of a road on the down hill side, is known as
A. retaining wall
B. breast wall
C. parapet wall
D. all the above.

---

121.  Retaining walls are generally constructed with dry rubble stones with 60 cm top width and
A. 1 2 front batter
B. 1 : 3 front batter
C. 1 4 front batter
D. 1 : 5 front batter.

---

122. In retaining and breast walls, weep holes are provided at
A. 50 cm vertical height and 50 cm centre to centre horizontally
B. 100 cm vertical height and 100 cm centre to centre horizontally
C. 100 cm vertical height and 120 cm centre to centre horizontally
D. 120 cm vertical height and 100 cm centre to centre horizontally.

---

123. Along a hill road, a side drain is provided on
A. outer side of a spur curve
B. outer side of a re-entrant curve
C. outer side of both (a) and (b)
D. inner side of both (a) and (b).

---

124. Parapet walls along hill roads, are provided
A. to retain the back filling
B. to prevent the hill from sliding
C. to prevent the wheels of the vehicle from coming on the retaining wall
D. Ilene of these.

---

125. Hill roads are
A. provided camber along spur curves
B. provided camber along valley curves
C. seldom provided a camber
D. None of these.

---

126.  Intermediate catch water drains are provided only, if
A. catchment area of the watershed above road is large
B. intensity of rainfall is heavy
C. single catch water drain is inadequate
D. all the above.

---