2.  75mm

3.  80mm

4.  All the above

1.  Cement

2.  Water

4.  Admixture

1.  Chemically inert

2.  Sufficiently strong

3.  Sufficiently hard and durable

1.  Sand

2.  Gravel

3.  Crushed rock

1.  Furnace clinker

2.  Coke breeze

3.  Saw dust

1.  Cyclopean aggregate

3.  Fine aggregate

4.  Aall-in-aggregate

1.  0.0075mm

3.  0.75mm

4.  0.95m

1.  Irregular

2.  Angular

4.  Flaky

1.  Irregular

3.  Rounded

4.  Flaky

1.  The maximum size of coarse aggregate should not exceed one fourth of the minimum dimension of the plain concrete member.

2.  The maximum size of coarse aggregate should not exceed one fifty of the minimum dimension of the reinforced concrete member

3.  The aggregates of 40mm, 20mm and 10mm sizes are commonly used for concrete works