Building Defects

Which of the following is not the causes of cracks in concrete?

• Improper structural and foundation design

• Improper mix design

• Installing wire mesh in concrete slab

• Improper materials

Steel is a combination of iron and carbon?

• True

• False

Concrete is a combination of the following mix. Which one is not?

• Course aggregate

• fine aggregatesl

• Acid

• Portland cement

• Water

Which of the following is not a defect in concrete?

• Colour variation

• crazing cracks

• settlement

• spalling

• effloresces

Cracks are not classified into structural and non structural cracks?

• True

• False

When a hairline cracks is detected in RC structure do one consider that cracks serious for considerations?

• Yes

• No

Which of the following is not a monitoring method for cracks?

• Visual inspection is not a monitoring method for cracks.
• Acoustic emission monitoring
• Dye penetrant inspection
• Ultrasonic testing

Which of the following is not considered the cause of honeycombing in concreting?

• Less cover to reinforcements

• congestion of bars

• Improper vibration

• use of form oil in formwork

• presence of bigger aggregate in concrete

What is maximum pouring height of concrete?

• 1.5m

• 0.5m

• 1m

• 2m

• 2.5m

Which of the following is not considered the causes of settlement in buildings and structures?

• Soft ground condition like marine clay

• uncompacted underlying soil structure

• Injection of grout into the underlying soil to support settlement

• slope failure- cut and fill

• non suspended slab on the platform