1Volumetric efficiency is AThe ratio of actual delivery to t

1-Volumetric efficiency is

A-The ratio of actual delivery to theoretical delivery.

B-The ratio of hydraulic power output to mechanical power output.

C-The ratio of overall efficiency to volumetric efficiency.

D-None of the above.

2-What are three important considerations when sizing a cylinder?  (select all that apply)

A-Forse B-Cost C-Speed D-Rpd size E-Color

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1-The most common pressure control valve is?

2-What are the four most important considerations when selecting a pump?

3-As shown in the figure above, two cylinders can be designed to raise an automobile. If the person on the input cylinder weighs 150 lb, and the automobile is 3000 lb. The input piston has an area of 2 in^2, what would be the output piston\'s area? How far the stroke at the input cylinder should be if we need to raise the automobile 5 ft

Please do it all of them hear ((DO NOT WRITE IN A PAPER))

Solution

1) A

2) A-Force,C- Speed, D- Rpm

1) Variable throttle Pressure control valve

2) a) Amount of discharge to be delivered

b) Total Head to be operated( Manometric head)

c) Type of fluid in operation

d) Input power/work availability

3) As per Pascal\'s law, pressure everywhere in fluid is same. So

pressure on Left side = Pressure on Right side

(Input load/ area1) = (output load /area2)

(150/2) = (3000/A2)

Output piston area(A2) = 40 in^2

2nd case

Volume displaced on Left side = Volume displaced on Right side

(A1*L1) = (A2*L2)

(2*L1) = (40*5)

Stroke of the input cylinder needed(L1) = 100 ft