D71 MASTER THE DAY

Which failure mode is NOT associated with tension members?

• Gross section yielding
• Net section rupture
• Buckling
• Block shear

Answer explanation

Buckling is a compression member failure mode, not tension members.

Which of the following is a light form of tension member used in purlin systems?

• Sag rod
• Double channel
• Plate girder
• Box girder

Answer explanation

Sag rods are slender tension members supporting purlins.

A column with both ends fixed has an effective length equal to:

• 0.5 L
• L
• 2 L
• √2 L

Answer explanation

For both ends fixed, effective length is 0.5L.

Which section is least efficient for compression members?

• Circular tube
• I-section
• Single angle
• Box section

Answer explanation

Single angle is less efficient due to unsymmetrical shape.

Which part of a beam resists shear force primarily?

• Web
• Flanges
• Cover plates
• Stiffeners

Answer explanation

The web of an I-beam resists most of the shear force.

Which type of beam is used when the depth is restricted but high strength is required?

• Compound beam
• Simple beam
• Lintel
• Joist

Answer explanation

Compound beams provide greater strength where depth is limited.

A structural member subjected to torsion is termed as:

• Beam
• Column
• Torsion member
• Tie

Answer explanation

Members carrying torsional loads are torsion members.

Which type of bracing resists twisting of beams?

• Lateral bracing
• Torsional bracing
• Diagonal tie
• Base plate

Answer explanation

Torsional bracing like diaphragms resist twist of beams.

Which compression member is specifically a built-up steel column for heavy loads?

• Post
• Tie
• Stanchion
• Strut

Answer explanation

Stanchions are heavy built-up steel columns.

The term 'girder' refers to:

• Any major beam in a structure
• A small joist
• A roof purlin
• A timber post

Answer explanation

Girder is a general term for a large primary beam.