Which IS code provides the guidelines for design and construction of reinforced concrete?

• IS 800
• IS 875
• IS 456
• IS 3370

Answer explanation

IS 456:2000 is the standard Indian code for the design and construction of RCC structures.

What is the minimum grade of concrete recommended for RCC work in buildings?

• M10
• M15
• M20
• M25

Answer explanation

As per IS 456:2000, M20 is the minimum concrete grade for reinforced concrete in buildings.

In RCC, which component resists tensile forces?

• Cement
• Aggregate
• Concrete
• Steel reinforcement

Answer explanation

Steel reinforcement is provided in concrete because concrete is weak in tension.

The slump test is used to measure:

• Tensile strength
• Compaction
• Workability
• Segregation

Answer explanation

Slump test measures the consistency and workability of fresh concrete.

What is the main function of stirrups in RCC beams?

• Resist torsion
• Increase moment
• Resist shear
• Improve ductility

Answer explanation

Stirrups are transverse reinforcement used primarily to resist shear forces in beams.

What is the minimum nominal concrete cover to reinforcement for slabs as per IS 456:2000?

• 10 mm
• 15 mm
• 25 mm
• 30 mm

Answer explanation

IS 456 recommends a minimum cover of 15 mm for slabs to protect reinforcement.

What is the function of a gusset plate in steel trusses?

• Support decking
• Reduce weight
• Connect members
• Increase span

Answer explanation

Gusset plates are used at joints in trusses to connect multiple structural members.

Which rolled steel section is most efficient in resisting bending?

• T-section
• I-section
• Channel
• Angle

Answer explanation

I-sections are efficient in bending due to their high moment of inertia about the strong axis.

Which member in a roof truss typically acts in tension?

• Principal rafter
• Strut
• Purlin
• Tie

Answer explanation

Tie members are provided in roof trusses to resist tension.

Which steel joint is considered most rigid and efficient for dynamic loads?

• Riveted
• Bolted
• Welded
• Lap

Answer explanation

Welded joints provide high rigidity and strength, especially under dynamic or fatigue loading.