Organizer : Department of Mechanical Engineering, Sankar Polytechnic College(Autonomous), Sankar Nagar
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________is a device used to lift any liquid from a lower level to a higher level.*
5 points
Pump
Compressor
Turbine
Engine
In pump, the mechanical energy is converted into pressure energy (Hydraulic energy).*
5 points
True
False
The positive displacement pumps are mainly used for ___________*
5 points
transfer the fluids
pressure system
increase the velocity
None of these
The non-positive displacement pumps are mainly used to ___________*
5 points
transfer the fluids
pressure system
increase the velocity
None of these
Reciprocating pump is a __________*
5 points
Positive displacement pump
Non-Positive displacement pump
Negative displacement pump
None of these
When the liquid pressure is acting on only one face of the piston then the pump is known as a ________ reciprocating pump.*
5 points
Double acting
Single acting
Multiple acting
None of these
When the liquid pressure is acting on both face of the piston then the pump is known as a ________ reciprocating pump.*
5 points
Double acting
Single acting
Multiple acting
None of these
In reciprocating pump, the reciprocating motion of the piston or plunger is obtained by the __________*
5 points
Gear mechanism
Lever mechanism
Quick return mechanism
Crank and Connecting rod mechanism
The reciprocating pump is run by an electric motor or an engine.*
5 points
True
False
During the suction stroke of the reciprocating pump,_________*
5 points
Vacuum is created
liquid is compressed
Pressure is constant
Velocity is constant
In single acting reciprocating pump, the theoretical discharge (Q)(in cubic metre per second) is equal to______*
5 points
3ALN/60
2ALN/60
ALN/60
4ALN/60
In double acting reciprocating pump, the theoretical discharge (Q)(in cubic metre per second) is equal to______*
5 points
3ALN/60
2ALN/60
ALN/60
4ALN/60
The difference between the _____________is known as Slip.*
5 points
theoretical discharge & Actual discharge
theoretical velocity & actual velocity
theoretical work done & actual work done
None of the these
In reciprocating pump, the piston is reciprocating inside the cylinder with a _____________*
5 points
Rectilinear motion
Circular motion
Spherical motion
Simple harmonic motion
In a reciprocating pump, the pressure head variation due to the acceleration and retardation of the piston is called as___________*
5 points
Pressure head
Velocity head
Datum head
Acceleration head
In reciprocating pump, Total lift=_____________*
5 points
Suction head – Delivery head
Delivery head – Suction head
Suction head + Delivery head
Suction head x Delivery head
In a reciprocating pump, If the vacuum pressure exceeds ______ m of water, the water commences to vapourise and cavities of dissolved gases and vapours are formed.*
5 points
6.5
7.5
5.5
4.5
________are fitted to the suction and delivery pipes, very close to the cylinder, to reduce the acceleration head.*
5 points
Couplings
Rivets
Air compressor
Air Vessels
Which of the following is advantage of a reciprocating pump over centrifugal pump?*
5 points
Priming is not necessary.
Starting torque is less.
Suitable for working against high head and fluctuating discharge.
All of these
Which of the following is disadvantage of a reciprocating pump over centrifugal pump?*
5 points
Complicated construction
Initial cost is high.
Discharge is pulsating.
All of these.