Tag: pascal's law and its applications

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Multiple choice chemistry fluid pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.
Multiple choice physics fluid pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

Release valve is seen in :

  1. Hydraulic brakes

  2. Hydraulic jack

  3. Hydraulic press

  4. All
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

Multiple choice physics fluid pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

Pascal's law is used for the working of:

  1. Hydraulic brakes

  2. Hydraulic jack

  3. Hydraulic press

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

Multiple choice physics fluid pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

Hydraulic press works on the principle of Pascal's principle

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice physics fluid pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

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
Reveal answer Fill a bubble to check yourself
B Correct answer
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

Multiple choice physics pressure in fluids and atmospheric pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

The radii of the press plunger and the pump plunger are in the ratio 30 : 4. If an effort of 32 kgf acts on the pump plunger. Find the maximum effort the press plunger can overcome.

  1. 1600 kgf

  2. 1700 kgf

  3. 1800 kgf

  4. 1900 kgf
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$\dfrac {\text {Radius of the press plunger}}{\text {Radius of pump plunger}}=\dfrac {R}{r}$


$=\dfrac {30}{4}$

According to the principal of hydraulic machine,

$\dfrac {L}{E}=\dfrac {\pi R^2}{\pi r^2}$

$\Rightarrow \dfrac {L}{32 kgf}=(\dfrac {30}{4})^2$


$\Rightarrow \dfrac {L}{32}=\dfrac {900}{16}$

$\Rightarrow L=\dfrac {900\times 32}{16}=1800 kgf$