Tag: fluid pressure

Questions Related to fluid pressure

The powdered ore is agitated with water or washed with running stream of water. The heavy ore particles and lighter impurities are separated. This method of concentration is known as:

  1. metallurgy

  2. leaching

  3. gravity separation

  4. forth floatation process


Correct Option: C
Explanation:
  • Hydraulic washing is based on the difference between specific gravities of the ore and the gangue particles. 
  • It is, therefore, a type of gravity separation. In one such process, an upward stream of running water is used to wash the powdered ore. 
  • The lighter gangue particles are washed away and the heavier ore particles are left behind.

Release valve is seen in :

  1. Hydraulic brakes

  2. Hydraulic jack

  3. Hydraulic press

  4. All


Correct Option: C
Explanation:

In the construction of hydraulic press,release valve and press foot valves are there.hydraulic press consist of a pump tube connected with a press tube. The lower end of the pump tube is connected with a smaller tube which is further connected with an underground water tank. At the junction of the pump tube and the smaller tube is fitted a "pump foot valve" which opens in the upward direction only.

Which of the following consists of a master cylinder filled with a thick oil :

  1. Hydraulic brakes

  2. Hydraulic jack

  3. Hydraulic press

  4. All


Correct Option: A
Explanation:

A hydraulic brake essentially consist of a master cylinder which is filled with a thick oil,commonly called brake oil.

Pascal's law is used for the working of:

  1. Hydraulic brakes

  2. Hydraulic jack

  3. Hydraulic press

  4. All


Correct Option: D
Explanation:

Pascal's law is used on all the three.according to pascal's law, whenever any pressure is applied to any party of the boundary of a confined fluid,it is transmitted equally in all directions irrespective of the area on which it acts,and always acts at right angles to the surface of containing vessel.

Which of the following is used for punching holes in metals:

  1. Hydraulic brakes

  2. Hydraulic jack

  3. Hydraulic press

  4. All


Correct Option: C
Explanation:

Hydraulic press are used for compressing the straw and cotton bales.it is also used for punching holes in metals.

The material used for brake drum is

  1. Alluminum alloy

  2. Cast steel

  3. Pressed steel

  4. Cast Iron


Correct Option: D
Explanation:

The material used for brake drum is Cast Iron.


Hence, option D is correct.

The hydraulic press is used in the extraction of oil from oil-seeds.

  1. True

  2. False


Correct Option: A
Explanation:

Hydraulic press is used  for various purposes including extraction of oil from oil seeds . 

so  given statement is true
hence option (A) is correct

Hydraulic press works on the principle of Pascal's principle

  1. True

  2. False


Correct Option: A
Explanation:

Pascal law states that any increment in pressure applied to the enclosed fluid is transmitted undiminished at each pt of the fluid and the walls of the container.

and  hydraulic press works on the principle of pascal law 
so option (A) is correct.

Lifting automobiles in service stations is based on the principle of ________.

  1. Apparent pressure 

  2. Hydraulic pressure

  3. Atmospheric pressure

  4. none of the above


Correct Option: B
Explanation:

Lifting automobiles in service stations is based on the principle of Hydraulic pressure .

hydraulic press is based on the pascal law .
so option (B) is correct

Sand and sawdust can be separated by _________.

  1. gravity separation

  2. calcination

  3. magnetic separation

  4. none of these


Correct Option: A
Explanation:

Sand and saw dust can be separated by gravity separation method. The process can be used for separating insoluble substances which are heavier than liquid by allowing them to settle down on their own due to gravity.