D70 MASTER THE DAY

Which IS code provides general construction guidelines in steel structures?

• IS 456:2000
• IS 800:2007
• IS 875:1987
• IS 1893:2016

Answer explanation

IS 800:2007 provides guidelines for general construction in steel, covering design and practices.

The unit mass of structural steel is approximately:

• 7850 kg/m³
• 2500 kg/m³
• 8900 kg/m³
• 7200 kg/m³

Answer explanation

The unit mass (density) of structural steel is 7850 kg/m³, commonly used in structural analysis and design.

Which property of steel ensures resistance during earthquakes?

• Elasticity
• Toughness
• Ductility
• Hardness

Answer explanation

Ductility allows steel to deform without sudden failure, making it highly resistant during earthquakes.

Which IS code specifies dimensions for hot rolled steel sections?

• IS 808:1989
• IS 875:1987
• IS 2062:2011
• IS 1786:2008

Answer explanation

IS 808:1989 covers the dimensions for hot rolled steel sections like I, C, and angle sections.

Which of the following is NOT an advantage of steel structures?

• High strength for lesser weight
• Faster construction
• High scrap value
• Susceptible to corrosion

Answer explanation

Corrosion is a limitation of steel structures, requiring protective coatings or maintenance.

Which section is denoted as ISMB?

• I-Section
• C-Section
• Angle Section
• T-Section

Answer explanation

ISMB refers to Indian Standard Medium Weight Beams, commonly known as I-sections.

Which type of beam-to-beam connection uses angles on either side of the web?

• Seated connection
• Framed connection
• Butt connection
• Welded connection

Answer explanation

Framed connections use angles on either side of the web of the beam to connect with the main beam.

The typical value of modulus of elasticity (E) for structural steel is:

• 1.0 x 10⁵ N/mm²
• 2.0 x 10⁵ N/mm²
• 2.5 x 10⁵ N/mm²
• 3.0 x 10⁵ N/mm²

Answer explanation

Structural steel has a modulus of elasticity E = 2.0 x 10⁵ N/mm².

Which component of roof truss is generally in tension?

• Top chord
• Bottom chord
• Rafters
• Struts

Answer explanation

In roof trusses, the bottom chord resists outward thrust and is normally in tension.

Cold formed steel sections are manufactured by:

• Casting at high temperature
• Forging in hot state
• Forming thin sheets at room temperature
• Extrusion

Answer explanation

Cold formed steel sections are made by forming thin sheets at room temperature through rollers.