Tunnel Engineering

A. silt
B. sand
C. clay
D. gravel

A. Needle beam method
B. Army method
C. German method
D. Italian method

A. stone masonry
B. timber
C. cast iron
D. cement concrete

A. 6 mJ per second per m2 of face area
B. 6 m3 per minute per m2 of face area
C. 20 m3 per minute per m2 of face area
D. 6 m3 per hour per m2 of face area

A. wagon drill, churn drill, shot drill
B. wagon drill, shot drill, churn drill
C. shot drill, churn drill, wagon drill
D. churn drill, wagon drill, shot drill

A. only up holes
B. only down holes
C. horizontal or up holes
D. horizor„al, down or up holes

A. normal to face
B. inclined at 45° to the face
C. inclined at 15° to the face
D. inclined at 30° to the face