**921. Piezometers are used to measure**

A. pressure in water channels, pipes etc.

B. difference in pressure at two points

C. atmospheric pressure**D. very low pressure.**

**922. Manometers are used to measure****A. pressure in water channels, pipes etc.**

B. difference in pressure at two points

C. atmospheric pressure

D. very low pressure.

**923. Differential manometers are used to measure**

A. pressure in water channels, pipes, etc.**B. difference in pressure at two points**

C. atmospheric pressure

D. very low pressure.

**924. To measure very low pressure, we use**

A. barometers

B. piezometers**C. manometers**

D. differential manometers.

**925. Maximum size of clay particles, is :****A. 0.002 mm**

B. 0.04 mm

C. 0.06 mm

D. 0.08 mm

**926. The water content of soil is defined as the ratio of**

A. volume of water to volume of given soil

B. volume of water to volume of voids in soil

C. weight of water to weight of air in voids**D. weight of water to weight of solids of given mass of soil.**

**927. Water content of a soil sample is the difference of the weight of the given sample at the given temperature and the weight determined after drying it for 24 hours at temperature ranging from**

A. 80? to 90?C

B. 90? to 95?C

C. 95? to 100?C**D. 105? to 110?C.**

**928. Buoyant unit weight equals the saturated density**

A. multiplied by unit weight of water

B. divided by unit weight of)water

C. plus unit weight of water**D. minus unit weight of water.**

**929. According to the Indian Standards the specific gravity is the ratio of the unit weight of soil solids to that of water at a temperature of**

A. 17?C

B. 23?C**C. 27?C**

D. 30?.

**930. The ratio of the volume of voids to the volume of soil solids in a given soil mass, is known**

A. porosity

B. specific gravity**C. void ratio**

D. water content.

**NOTEIF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.THANK YOU**