The diagram shows a safety valve which releases steam when the pressure rises above a pre-determined value. The mass of the rod and the valve cover are negligible.
The diagram shows a safety valve which releases steam when the pressure rises above a pre-determined value. The mass of the rod and the valve cover are negligible.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter28: Special Refrigeration Applications
Section: Chapter Questions
Problem 2RQ
Related questions
Question
Show all working explaining detailly each step.
Answer A45 b(i), (ii) & (iii)
![A45 (a) State the conditions for equilibrium for a
body which is acted upon by a system of
coplanar forces.
(b) The diagram shows a safety valve which
releases steam when the pressure rises
above a pre-determined value. The mass
of the rod and the valve cover are
negligible.
5.0 cm
50 cm
Fivot"
Valve
Rod
cover
5.0kg
Steam
preusure
vessel
(i) Sketch a diagram showing the forces
acting on the rod when there is
normal atmospheric pressure in the
steam vessel.
(ii) Determine the magnitude of the
force at the valve which just opens
the valve.
(ii) The outlet has a cross-sectional area
of 2.0 cm. Using the force calcu-
lated in (b)(ii) determine the excess
pressure above atmospheric pres-
sure in the vessel when the valye
just opens. Give your answer in
pascals (Pa).
[АЕВ, "90]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5a6d9c67-6f13-49d2-ac4d-2d996f90a88b%2F0708e991-76ef-43ec-986a-c773a8ab0372%2Fhspnpfr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A45 (a) State the conditions for equilibrium for a
body which is acted upon by a system of
coplanar forces.
(b) The diagram shows a safety valve which
releases steam when the pressure rises
above a pre-determined value. The mass
of the rod and the valve cover are
negligible.
5.0 cm
50 cm
Fivot"
Valve
Rod
cover
5.0kg
Steam
preusure
vessel
(i) Sketch a diagram showing the forces
acting on the rod when there is
normal atmospheric pressure in the
steam vessel.
(ii) Determine the magnitude of the
force at the valve which just opens
the valve.
(ii) The outlet has a cross-sectional area
of 2.0 cm. Using the force calcu-
lated in (b)(ii) determine the excess
pressure above atmospheric pres-
sure in the vessel when the valye
just opens. Give your answer in
pascals (Pa).
[АЕВ, "90]
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