Question Discussion & Solution

Concept:

• Water Harvesting: Water harvesting is a practice to conserve water by collecting rainwater in an organized way.
  • The rainwater is not allowed to flow and get wasted but collected in tanks.
  • The main purpose however is not the collection but the enhancement of groundwater level.  
  • The collected water through tubes is made to recharge groundwater.
  • Maintenance of groundwater is long term sustainable structure for water conservation.

Here the logic is the methods which consumes water:

Explanation:

Kneading:

• Kneading is a process in the making of dough by mixing water and flour.
• Example: Kneading dough for roti. 
• Consumes water

Swimming also need water to do so.

Washing clothes is also a process that consumes.

While combing hair, no need of water.

int add (int a, int b=12) // formal argument
{
return a + b;
}
main()
{ 
int c;
c = add (10, 20);
printf("c = %d", c);
}

In this Program Add function is following the call by value mechanism so that value cannot be called outside the function So the answer will be a+b = 10+ 20 = 30 

Therefore Option B is correct

All are divisible by 10 except 25.

Least possible diagram is:

I. Some car are Maruti. → True

II. No Ciaz is a Maruti. → False

Concept:

• Viscosity: It is a property of a fluid to oppose relative motion between its layer.
  • The coefficient of viscosity is “η“ and dimension is [ ML^-1T^-1].
• Kinetic Viscosity: It is a measure to the inherent resistance of the of a fluid to flow when no external force is acted expect gravity.
  • Kinetic Viscosity = coefficient of viscosity / fluid mass density
  • V = η / ρ

Explanation:

• Dimensional formula of viscosity is [ ML^-1T^-1].