1. When the plastic limit is equal to or greater than the liquid limit, then plasticity index is ___.

[A] Negative

[B] Zero

[C] One

[D] More than one

Answer: Option B


2. The soil transported by running water is called ____.

[A] Aeolian soil

[B] Alluvial soil

[C] Marine soil

[D] Lacustrine soil

Answer: Option B


3. A soil having particles of nearly the same size known as ____.

[A] Well graded 

[B] Poorly graded

[C] Gap graded 

[D] Uniformly graded

Answer: Option D


4. Which are the corrections applied to the hydrometer readings?

(i) Meniscus correction

(ii) Temperature correction

(iii) Density correction

(iv) Dispersing agent correction

[A] (i) and (ii)

[B] (i), (ii) and (iii)

[C] (i), (ii), (iii) and (iv)

[D] (i), (ii) and (iv)

Answer: Option D


1. Meniscus correction: 

The hydrometer readings increase downward on the stem. 

Meniscus correction (Cm) is always positive (+ve).

2. Temperature correction: 

Temperature more than calibration temperature, Observed Reading is Less, Correction = +ve 

Temperature less than calibration temperature, Observed Reading is More, Correction = -ve

3. Dispersing agent correction: 

The addition of the dispersing agent increases the density of the suspension. 

Correction (Cd) is applied which is always negative (-ve).


5. According to IS Classification system, the soils can be classified into

[A] 18 Groups

[B] 15 Groups

[C] 3 Groups

[D] 7 Groups

Answer: Option A



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