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WorksheetsAUTOMATION USING HYDRAULIC SYSTEMS
Total questions: 15
Worksheet time: 12mins
Non-positive displacement pumps have a (a) clearance between rotating and stationary parts.
Flow rate of pump does ______ with head in the case of a positive displacement pump, while it ______ with head in the case of a non-positive displacement pump.
(a)
Mark True or False : Too low elevation head between the reservoir and the pump inlet causes cavitation.
True
False
Mark True or False : Efficiency is almost constant with the head in the case of non-positive displacement pumps.
True
False
A hydraulic motor is a device which converts fluid pressure into (a) .
Mark True or False : Hydraulic motors can be stalled for any length of time and their direction of rotation can be instantly reversed and their rotational speed can be infinitely varied.
True
False
Key parameters of Pump Design includes (Select all that apply)
Capacity
Power consumption
Head
All the Above
None of the above
Centrifugal pumps constitute more than --------- of the world production of pumps, due to their capacity to handle -----------.
85% , high flows
85% , low flows
75% , high flows
75% , low flows
Expand NPSH
Net Power Suction Head
Net Positive Stroke Head
Net Positive Suction Head
Net Power stroke Head
The six-layer media pack specifically designed for (Select all that apply)
Better efficiencies
Excellent stability
Higher pressure drops
Higher dirt holding capacities
All the above
Cavitation is formation of vapor cavities (bubbles or voids) in a liquid
True
False
In Cavitation, When the bubbles are subjected to a higher pressure, they implode and generate an
Intense shockwave
Intense impact
Intense Power
Baffle Serves
Permit Foreign substances
Allows air to escape
Provides Heat dissipation
All the above
None of the above
DESIGN ASPECTS OF INTENSIFIERS
Low operating pressure in the system
Full flow available at pump pressure
Use standard tubing, hoses and valves
No need for extra tubing or special parts
all the above
In Accumulator, the polytropic coefficient n varies from
1 - 1.2
1-1.3
1-1.4
1-1.5
