This set of Hydraulic Machines online quiz focuses on “Hydraulic Intensifier and Hydraulic Ram”.
1. A __________ is a hydraulic machine for converting hydraulic power at low pressure into a reduced volume at higher pressure.
a) Hydraulic Ram
b) Hydraulic crane
c) Hydraulic Intensifier
d) Hydraulic accumulator
Explanation: A hydraulic intensifier is a hydraulic machine for converting hydraulic power at low pressure into a reduced volume at higher pressure. The working volume of the intensifier is limited by the stroke of the piston. This in turn limits the amount of work that may be done by one stroke of the intensifier.
2. If the diameters of the two pistons used in the arrangement are different, the _______ in each cylinder will vary.
a) Hydraulic velocities
b) Hydraulic acceleration
c) Hydraulic pressure
d) Hydraulic force
Explanation: If the diameters of the two pistons used in the arrangement are different, the hydraulic pressure in each cylinder will vary. The hydraulic pressure in both the cylinders will change in the same ratio as their areas. The smaller piston will give rise to a higher pressure.
3. The working volume of the intensifier is restricted by the stroke of the ________
Explanation: The working volume of the intensifier is restricted by the stroke of the piston. As a result of this the amount of work that may be done by one stroke of the intensifier is controlled. These are not reciprocating machines.
4. Intensifiers are employed as a part of machines such as ________
a) Hydraulic presses
b) Hydraulic Crane
c) Hydraulic accumulator
d) Hydraulic Ram
Explanation: Intensifiers are employed as part of machines such as hydraulic presses. Here, a higher pressure is required. Also,a suitable supply is made sure to be already available.
5. Small intensifiers usually have a ________ in their basic system.
a) Stepped piston
b) Stepped cylinder
d) Stepped presses
Explanation: Small intensifiers have been constructed with a stepped piston. It is usually a double-ended piston. It consists of two unique diameters where each end works in a different cylinder.
6. Most commonly used hydraulic intensifier for water jet cutting is _________
a) Inline hydraulic intensifier
b) Parallel hydraulic intensifier
c) Pressed hydraulic intensifier
d) Casting hydraulic intensifier
Explanation: Most commonly used hydraulic intensifier for water jet cutting is inline hydraulic intensifier. It is more reliable. Also, it causes the efficiency to be improved.
7. When the intensifier is placed outside its jack, it produces higher ________
Explanation: When the intensifier is placed outside its jack, it produces higher pressure. As a result, a smaller cylinder can be used to lift the same force. They are often employed with a powerful hydraulic jack.
8. A ________ is a cyclic water pump that derives its power from hydroelectric sources.
a) Hydraulic crane
b) Hydraulic Ram
c) Hydraulic Accumulator
d) Hydraulic presses
Explanation: A hydraulic ram is a cyclic water pump that derives its power from hydroelectric sources. It is also known as hydram. It takes in water at a particular pressure and flowrate and delivers it at higher pressure and flowrate.
9. A hydraulic ram uses the _______ effect to develop pressure.
a) Water hammer
b) Pascal’s law
Explanation: A hydraulic ram uses the water hammer effect to develop pressure. This effect permits a portion of the input water to power a pump. This pump is then lifted to a point higher than where the water originally started.
10. Hydraulic Ram is used in areas where there is a source of ________ power.
Explanation: Hydraulic Ram is used in areas where there is a source of hydroelectric power. There should also be a necessity for pumping water to a destination higher in height than the source. it doesn’t need any any outside source of power than the kinetic energy of flowing water.
11. The typical efficiency of a hydraulic ram is ____
Explanation: The typical efficiency of a hydraulic ram is 60%. This, however , is not the same as volumetric efficiency. Volumetric efficiency relates the volume of water delivered to total water taken from the source.
12. _______ aids in cushioning the shock of the hydraulic pressure during the working of the hydraulic ram
a) Pressure vessel
b) air bags
c) inlet valve
d) Drive pipe
Explanation: Pressure vessel aids in cushioning the shock of the hydraulic pressure during the working of the hydraulic ram. It contains air cushions. It also helps in making the pumping efficiency better.
13. ___________ restricts the dissolution of the pressurized air into the water.
a) Elastic diaphragm
b) Pressure vessel
c) Inlet pipe
d) Waste valve
Explanation: Elastic diaphragm restricts the dissolution of the pressurized air into the water. It is similar in design to an expansion tank. It causes the separation of the air from the water.
14. One of the main reasons why the cycling stops in the hydraulic ram is due to poor adjustment of ________
a) pressure vessel
c) waste valve
d) water hammer
Explanation: One of the main reasons why the cycling stops in the hydraulic ram is due to poor adjustment of waste valve. This is a common operational problem. This might cause a lag in the proper delivery of water.
15. An alternate option to the hydraulic ram is _________
a) water-powered pump
b) Oscillating pump
c) Inlet pressure pump
d) Water vessel pump
Explanation: An alternate option to the hydraulic ram is the water-powered pump. It is used when a large flow rate at a high head ratio is needed. A water-powered pump unit is a hydraulic turbine connected to a water pump.
Sanfoundry Global Education & Learning Series – Hydraulic Machines.
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