Compared to mild steel, cast iron has (1) high compressive strength (2) high tensile strength (3) low compressive strength (4) low tensile strength The correct answer is_________________?

Compared to mild steel, cast iron has (1) high compressive strength (2) high tensile strength (3) low compressive strength (4) low tensile strength The correct answer is_________________?

A. (1) and (2)
B. (2) and (3)
C. (3) and (4)
D. (1)and(4)

In a colar beam roof_______________?

In a colar beam roof_______________?

A. there is no horizontal tie beam
B. there is a horizontal tie at the feet of rafters only
C. there is a horizontal tie at almost the middle of rafters only
D. there are two horizontal ties, one at the feet and other at the middle of the rafters