A pipe with a cross sectional area of 5x10 m' is delivering oil at a rate of 1x10 m/s at a pressure of 700 kPa. This pipe connects by a gradually expanding pipe to a main of cross sectional area of 3x10 m which runs 2 m above it. Calculate the pressure in the main, neglecting losses to friction. The oil has a density of 890 kg/m.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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A pipe with a cross sectional area of 5x10 m is delivering oil at a rate of Ix10 m/s at a
pressure of 700 kPa. This pipe connects by a gradually expanding pipe to a main of cross
sectional area of 3x10 m which runs 2 m above it. Calculate the pressure in the main,
neglecting losses to friction. The oil has a density of 890 kg/m.
(1)
Answer each of the following for an electropneumatic circuit that operates a single acting
cylinder with direct control.
(i)
Sketch the pneumatic and clectrical circuit that uses the logic OR operation to extend
the cylinder.
(ii)
Sketch the pneumatic and cleetrical circuit that uses the logic AND operation to extend
the cylinder.
(2.5
ks)
Air at a pressure of 6 bar gauge pressure has a volume of 3m'. The volume of the air is
allowed to increase to 5m' at constant temperature. What is the air gauge pressure at the new
volume? The atmospheric pressure is 101.85kN/m.
(h)
For a vertically mounted hydraulic actuator with an overrunning load, what is the major
disadvantage of using a counter balance valve to prevent a weight from falling uncontrollably
and how can it be overcome?
Air
Transcribed Image Text:Read 14 83% A pipe with a cross sectional area of 5x10 m is delivering oil at a rate of Ix10 m/s at a pressure of 700 kPa. This pipe connects by a gradually expanding pipe to a main of cross sectional area of 3x10 m which runs 2 m above it. Calculate the pressure in the main, neglecting losses to friction. The oil has a density of 890 kg/m. (1) Answer each of the following for an electropneumatic circuit that operates a single acting cylinder with direct control. (i) Sketch the pneumatic and clectrical circuit that uses the logic OR operation to extend the cylinder. (ii) Sketch the pneumatic and cleetrical circuit that uses the logic AND operation to extend the cylinder. (2.5 ks) Air at a pressure of 6 bar gauge pressure has a volume of 3m'. The volume of the air is allowed to increase to 5m' at constant temperature. What is the air gauge pressure at the new volume? The atmospheric pressure is 101.85kN/m. (h) For a vertically mounted hydraulic actuator with an overrunning load, what is the major disadvantage of using a counter balance valve to prevent a weight from falling uncontrollably and how can it be overcome? Air
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