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31.

For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?                        
A. oven drying method B. sand bath method
C. alcohol method D. calcium carbide method



32.

Highway Research Board (HRB) classification of soils is based on                        
A. particle size composition B. plasticity characteristics
C. both particle size composition and plasticity characteristics D. none of the above



33.

If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is                        
A. 90 B. 45
C. 22.5 D. 0




34.

If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is                        
A. 40% B. 60%
C. 80% D. 100%



35.

If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then                        
A. the liquid limit of soil always increases B. the liquid limit of soil always decreases
C. the liquid limit of soil may increase D. the liquid limit of soil may decrease



36.

If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in                        
A. liquid state B. plastic state
C. semi-solid state D. solid state



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