) The external diameter of cast iron or steel shaft in a screw pile varies from:
A. 150-300 mm
B. 0-150 mm
C. 450-600 mm
D. 300-450 mm
Answer:A
) The external diameter of cast iron or steel shaft in a screw pile varies from:
A. 150-300 mm B. 0-150 mm C. 450-600 mm D. 300-450 mm