EXIT-ENTRANCE QUIZ - PRE TEST

Timber is known as a sustainable material. Using timber, a lot of benefits can be acquired to society and the environment EXCEPT

• Timber building can be reused in another project

• Tree released CO₂ and absorbed O₂

• Harvesting trees keeps the carbon imprisoned in the wood.

• Timber buildings will require less energy to heat or cool

All the products below are engineered timber, EXCEPT

• Dowel laminated timber

• Glued laminated timber

• Parallel strand Lumber

• Structural sawn lumber

Below is modification factor involved in bending stress design EXCEPT

• Duration of loading, K₁

• Depth factor, K₆

• Notched member, K₄

• Form factor, K₅

What is the permissible bending stress for 38mm x 150mm timber joists if the bending grade stresses parallel to grain given as 14.2 N/mm². The duration of loading for these timber joists is long-term loading.

• 11.65 N/mm²

• 15.62 N/mm²

• 15.26 N/mm²

• 14.62 N/mm²

What is the effective length for 3.5meter height column with end of fixed-pinned condition?

• 2.45 m

• 7.00 m

• 3.50 m

• 2.98 m

What is a mode of failure for the short column?

• Buckling only

• Shearing and crushing

• Shearing and buckling

• Crushing and buckling

What is the applied tensile stress if the tensile force for the tie structure is 15kN and the net area is 3800mm²?

• 395.0 N/mm²

• 39.50 N/mm²

• 3.95 N/mm²

• 39.55 N/mm²

Which one is NOT TRUE about Permissible Stress Design Approach?

• Timber members are designed such that applied stresses do not exceed the permissible stresses given in MS 544

• Stresses must remain within elastic limits

• Safety factors based on partial safety for loads and materials

• It applies a factor of safety (FOS) to the material's ultimate strength

What is grade stresses?

• The stresses which can safely be sustained by a structure component under the particular condition of service and loading

• The stress which can be safely be permanent sustained by timber of a particular grade such as select, standard or common

• The stress that can safely be permanent sustained by timber containing no strength reducing characteristics

What is permissible stresses?

• The stresses which can safely be sustained by a structure component under the particular condition of service and loading

• The stress which can be safely be permanent sustained by timber of a particular grade such as select, standard or common

• The stress that can safely be permanent sustained by timber containing no strength reducing characteristics