Which one of the following statements is correct?
A. DTH is a rotary drill
B. Jack Hammer is a percussive drill
C. DTH is a rotary- cum- percussive drill
D. Jack Hammer is a rotary- cum - percussive drill
Answer:B
Which one of the following statements is correct?
A. DTH is a rotary drill B. Jack Hammer is a percussive drill C. DTH is a rotary- cum- percussive drill D. Jack Hammer is a rotary- cum - percussive drill