less than 0.25

between 0.25 and 0.7

between 0.7 and 1.5

greater than 1.5

ultimate stress

yield stress

proof stress

none of the above

less than 1

equal to 1

greater than 1

less than 1 in beams but greater than 1 in channels

wood work

iron work

both wood work and iron work

none of the above

Both A and R are true and, R is the correct explanation of A.

Both A and R are true but R is not the correct explanation of A

A is true but R is false

A is false but R is true