1. If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is

1. 1. less than specific gravity of soil

   
   
   

   2. equal to specific gravity of soil

   
   
   

   3. greater than specific gravity of soil

   
   
   

   4. independent of specific gravity of soil

   
   
   

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1. View Hint View Answer Discuss in Forum

   S = 100% (fully saturated)
   

   e =	wn
   	Sr

   
   

   ∴ e =	100G	= G
   	100

   Correct Option: B

   S = 100% (fully saturated)
   

   e =	wn
   	Sr

   
   

   ∴ e =	100G	= G
   	100

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2. Which of the following statements is NOT correct?

1. 1. Loose sand exhibits contractive behaviour upon shearing

   
   
   

   2. Dense sand when under untrained condition, may lead to generation of negative pore pressure

   
   
   

   3. Black cotton soil exhibits expansive behaviour

   
   
   

   4. Liquefaction is the phenomenon where cohesion less soil near the downstream side of dams or sheet-piles loses its shear strength due to high upward hydraulic gradient

   
   
   

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1. View Hint View Answer Discuss in Forum

   Liquefaction is due to cyclic load and not due to high hydraulic gradient.

   Correct Option: D

   Liquefaction is due to cyclic load and not due to high hydraulic gradient.

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3. Which of the following statements is TRUE for the relation between discharge velocity and seepage velocity?

1. 1. Seepage velocity is always smaller than discharge velocity

   
   
   

   2. Seepage velocity can never be smaller than discharge velocity

   
   
   

   3. Seepage velocity is equal to the discharge velocity

   
   
   

   4. No relation between seepage velocity and discharge velocity can be established

   
   
   

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1. View Hint View Answer Discuss in Forum

   Seepage velocity,
   

   Vs =	V
   	n

   
   n(porosity) is always less than 1
   ∴ V_s > V (always)

   Correct Option: B

   Seepage velocity,
   

   Vs =	V
   	n

   
   n(porosity) is always less than 1
   ∴ V_s > V (always)

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4. The clay mineral primarily governing the swelling behaviour of Black Cotton soil is

1. 1. Halloysite

   
   
   

   2. Illite

   
   
   

   3. Kaolinite

   
   
   

   4. Montmorillonite

   
   
   

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1. View Hint View Answer Discuss in Forum

   Montmorillonite

   Correct Option: D

   Montmorillonite

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5. The relationship between porosity (η) specific yield (S_y) and specific retention (S_r) of an unconfined aquifer is:

1. 1. S_y + S_r = η

   
   
   

   2. S_y +η = S_r

   
   
   

   3. S_r + η = S_r

   
   
   

   4. S_y + S_r + η = 1

   
   
   

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1. View Hint View Answer Discuss in Forum

   Porosity (η), specific yield (S_y), specific retention (S_r) are related as;
   S_y + S_r = η

   Correct Option: A

   Porosity (η), specific yield (S_y), specific retention (S_r) are related as;
   S_y + S_r = η

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