D70 QUIZ OF THE DAY

Which type of steel structure provides column-free large spaces such as in auditoriums?

• RCC frame structure
• Steel roof truss
• Timber truss
• Masonry vault

Answer explanation

Steel roof trusses are designed to cover large spans without intermediate columns, ideal for auditoriums and warehouses.

Which IS code is used for cold-rolled steel sheet sections?

• IS 2062
• IS 1079
• IS 808
• IS 800

Answer explanation

IS 1079:1968 specifies cold-rolled steel sheets used in cold-formed sections.

Which structural property of steel is approximately 0.769 × 10⁵ N/mm²?

• Modulus of elasticity
• Poisson’s ratio
• Modulus of rigidity
• Thermal expansion coefficient

Answer explanation

The modulus of rigidity (shear modulus) of structural steel is about 0.769 × 10⁵ N/mm².

Which IS code is used as a handbook for structural engineers?

• SP:6(1)
• IS 800
• IS 808
• IS 2062

Answer explanation

SP:6(1) is the Handbook for Structural Engineers widely used in design practices.

Which cold-formed steel section is commonly used as bracing?

• Flat steel straps
• I-section
• Channel section
• Z-section

Answer explanation

Flat steel straps are used as bracing in cold-formed steel housing and wall systems.

Which of the following is a limitation of steel structures?

• Possibility of future expansion
• Susceptibility to fatigue and stress concentration
• Recyclability
• High scrap value

Answer explanation

Steel members are prone to fatigue and stress concentration under repeated loading.

Which structural steel grade is commonly used according to IS 2062?

• Fe 250
• E-250 (Fe 410)
• Fe 500
• Fe 600

Answer explanation

The commonly used grade for structural steel as per IS 2062 is E-250 (Fe 410).

Which of the following is an example of built-up steel section?

• Rolled I-section
• Compound stanchion
• ISMC channel
• Angle section

Answer explanation

Built-up or compound stanchions are examples of built-up steel sections.

In cold-formed steel, what is the minimum yield strength value?

• 232 N/mm²
• 250 N/mm²
• 390 N/mm²
• 410 N/mm²

Answer explanation

Cold-formed steels have a minimum yield strength of 232 N/mm².

Which type of steel member is defined as a large deep beam with an open web?

• Purlin
• Truss
• Beam
• Column

Answer explanation

Trusses are large deep beams with open web structures formed with triangular arrangements.