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481.

The column bases are mainly subjected to and designed for

A.	bending and compression	B.	compression and tension
C.	bearing and tension	D.	bearing and compression

482.

In case of rolled steel beams, the chear force is resisted by

A.	flanges only	B.	web only
C.	web and flanges together	D.	top flange only

483.

The minimum thickness of steel members exposed to weather and accessible for paintng is

A.	4 mm	B.	6 mm
C.	8 mm	D.	10 mm

484.

The minimum thickness of steel members exposed to weather and accessible for painting is

A.	6 mm	B.	8 mm
C.	10 mm	D.	12 mm

485.

For determination of allowable stress in axial compression, IS : 800-1962 has adopted

A.	Euler's formula	B.	Rankines formula
C.	Perry Robertson formula	D.	Secant formula

486.

The Euler's formula for columns is valid for

A.	zero slendemess ratio	B.	large slenderness ratio
C.	small slenderness ratio	D.	all slenderness ratios

487.

The turbular section of a column has

A.	negligible buckling strength	B.	low buckling strength
C.	high buckling strength

488.

Which of the following statement is incorrect?

A.	For columns, the solid round bar is less economical than the turbular section	B.	The radius of gyration for the tubular section in all directions remains the same
C.	A tubular section is most economical for the column free to buckle in any direction	D.	none of the above

489.

The stability of a structure is ensured if the restoring moment is

A.	equal to	B.	smaller than
C.	greater than

490.

In case of rivets, the countersunk heads are used to

A.	connect unequal sections	B.	connect structural members
C.	provide a fluish surface	D.	connect different materials