Day 35-Oct 24-worksheet-Btech-Concrete technology part 1

Fineness modulus is defined as:

• Ratio of fine to coarse aggregate

• Average particle weight

• Index representing mean particle size

• Volume ratio of particles

Maximum size of aggregate used for RCC work is:

• 10 mm

• 20 mm

• 30 mm

• 40 mm

Weigh batching is preferred over volume batching because:

• Fastest method

• Prevents segregation

• Avoids bulking error

• Ensures uniform colour

Vibratory rollers in compaction are mainly used for:

• RCC slabs

• Electric poles

• Dams

• Pavement and mass concrete layers

The test most suitable for very dry concrete is:

• Slump test

• Flow test

• Vee-Bee consistometer test

• Kelly ball test

“Bulking of sand occurs due to adsorption of water on particle surface.”

• True

• False

The pH of water used in concrete shall not be less than __________.

The process of measurement of ingredients of concrete is called __________.

The slump value is the difference in height between mould and __________.

Self compacting concrete has————-slump value

• 650 mm

• 200 mm

• 450 mm

• 150 mm