16) The fineness of cement is tested by

• (a) air-permeability method
• (b) Le-chatelier method
• (c) Vicat’s apparatus
• (d) all of the above

17) The soundness of cement is tested by

• (a) air permeability method
• (b) Le-chatelier method
• (c) Vicat’s apparatus
• (d) all of the above

18) The diameter of the Vicat plunger is 10 mm and its length varies from

• (a) 20 mm to 30 mm
• (b) 30 mm to 40 mm
• (c) 40 mm to 50 mm
• (d) 50 mm to 60 mm

19) Vicat’s apparatus is used to determine the

• (a) initial setting time of cement
• (b) final setting time of cement
• (c) normal consistency of cement
• (d) all of the above

20) A good Portland cement when tested for fineness, the percentage of residue left after sieving in 90 micron IS sieve should not exceed 10 percent.

• (a) True
• (b) False