Tag: examples of hydraulic press

Questions Related to examples of hydraulic press

Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.

  1. Cube of diameter

  2. Fourth power of diameter

  3. Square of diameter

  4. Diameter


Correct Option: B
Explanation:

Power required to drive a centrifugal pump is directly proportional to the fourth power of the diameter of its propeller.

$\therefore$  Power     $P \propto  D^4$

The greater the differences in the areas of the cylinders, the greater the           force output of the big cylinder for hydraulic jack. Fill in the gap

  1. Potential

  2. Kinetic

  3. Rotational

  4. Dynamic


Correct Option: A
Explanation:

According to the Pascal's law       $\dfrac{F _1}{A _1} = \dfrac{F _2}{A _2}$
$\implies$   Greater the difference in the areas of the cylinder , greater is the force potential output of the big cylinder for hydraulic jacks.

The center of pressure of surface subjected to fluid pressure is the point

  1. on the surface at which resultant pressure acts

  2. on the surface at which gravitational force acts

  3. equal to volume of liquid displaced

  4. none


Correct Option: B
Explanation:

The center of pressure of surface subjected to fluid pressure is the point on the surface at which gravitational force acts

Which of the following pump is preferred for flood control and irrigation applications?

  1. Centrifugal pumop

  2. Axial Flow pump

  3. Mixed flow pump

  4. Reciprocating pump


Correct Option: B
Explanation:

The axial pump is a pump in which fluid flows axially to the rotation of the propeller. In Axial flow, the fluid flows parallel to the axis of rotation, as in a turbine. Axial flow pump contains a propeller or centrifugal impeller in the casing. Axial Flow pump is preferred for flood control and irrigation applications.

Slip of a reciprocating pump is defined as

  1. Difference of theoretical discharge and actual discharge

  2. ratio of actual discharge to theoretical discharge

  3. ratio of theoretical discharge to actual discharge

  4. None


Correct Option: A
Explanation:

Slip of a reciprocating pump is defined as  Difference of theoretical discharge and actual discharge.


Hence, option A is correct.

jacks can be categorized based on which types of forces from below

  1. Mechanical and hydraulic

  2. Mechanical and kinetic

  3. Kinetic and potential

  4. Hydraulic and rotational


Correct Option: A
Explanation:

Jacks can be categorized based on mechanical and hydraulic forces.

The shaft in floor jack is vertical. Is the statement true or false

  1. True

  2. False


Correct Option: B
Explanation:

The shaft in the floor jack is horizontal. Hence option B is correct.

What does hydraulic jacks use to move oil through two cylinders?

  1. Pipe

  2. Wheel

  3. Pump Plunger

  4. Tube


Correct Option: C
Explanation:

Hydraulic jacks use pump plungers to move oil through two cylinders.

How many commonly used hydraulic jacks are available?

  1. 3

  2. 4

  3. 2

  4. 1


Correct Option: C
Explanation:

Two types of hydraulic jacks are commonly used- bottle jacks and floor jacks.

An enclosed fluid under pressure exerts that pressure throughout its volume and against any surface containing it. Is the statement true or false

  1. True

  2. False


Correct Option: B
Explanation:

It is true that an enclosed fluid under pressure exerts that pressure throughout its volume and against any surface containing it.