Absolute pressure >Gauge pressure> vacuum pressure >actual pressure> positive pressure >negative pressure> suction pressure>unitech108

Fluid mechanics

Reference of pressure measurement 


My book:-https://imojo.in/unitech108
  1. Absolute pressure/ actual pressure
  •  The pressure of the system measured from zero level/ perfect vacuum/ absolute zero pressure is called absolute pressure 
  • absolute pressure measured by the "Android meter"
2. Gauge pressure 

  • positive guage pressure=The net pressure of system above the atmospheric pressure is cal toled positive gauge pressure 
  • Negative guage pressure /suction pressure/ vacuum pressure= the net pressure of system below the atmospheric pressure is called suction pressure 
Note 
  • guage pressure is measured by the manometer device 
  • negative reading not possible in absolute system 
  • atmospheric pressure in space reading will be zero 
  • reaction between absolute pressure atmospheric pressure and gauge pressure 
P(absolute)=P(atmosphere)+P(gauge)
Q.determine the cause pressure for 14.3 of H2O

Comments

Post a Comment

please do not enter any spam link in the comment box

Popular posts from this blog

what is the capillary rise and fall>phenomenon of capillary tube>formula>fluid mechanics>episode-16

Image
FLUID MECHANICS Capillarity MY BOOK:- https://imojo.in/unitech108 It's the phenomenon of rise and fall of the liquid surface in small tube (diameter is less than 10mm) relative to adjacent level of liquid when tube is immersed vertically downward The rise of liquid is known capillary rise and the fall of liquid is known as capillary depression   $ads={1} Phenomenon Minicus=down Convexity=down Concavity=up Adhesion>cohession Wetting liquid θ<90° Minicus=up Convexity=up Concavity=down Adhesion<cohession Non Wetting liquid θ>90° $ads={2} Note For water (pure) and clean glass combination θ≈0° For clean glass and AgNO ₃ solution θ≈90° For clean glass and Mercury (hg) θ≈128°, θ≈125° to 140° capillary rise /depression is given by H=4Tcosθ/¶gd where,T=surface tension θ=contact angle d=diameter of tube ¶=density of liquid H=capillary rise/depression left sidebar contact form x
recent posts

Geography Quiz/12th Bihar Board Exam/VVI Question for SSC GD, Group D, Railway

Image
📎📎 Youtube 📎📎 Geography Quiz-01/12th Bihar Board Exam/VVI Question for SSC GD, Group D, Railway प्रश्न 1.नव निश्चयवाद के प्रवर्तक कौन हैं A.रैटजेल B.टेलर✔ C.हंबोल्ट D.ब्लॉश प्रश्न 2.संभववाद शब्द का प्रयोग सर्वप्रथम किस फ्रांसीसी विद्वान ने किया था A.विडाल डी लॉ ब्लाश✔ B.लुसियन फैबरे C.फ्रांसीसी बेकन D.जीन ब्रून्स प्रश्न 3 भूगोल का जनक माना जाता है यूनान को✔ एशिया को अफ्रीका को इनमें से कोई नहीं प्रश्न 4 निम्नलिखित में से कौन एक महाद्वीप में जनसंख्या वृद्धि सर्वाधिक है एशिया✔ अफ्रीका दक्षिण अमेरिका  उत्तरी अमेरिका प्रश्न 5 निम्नलिखित में किस देश का लिंग अनुपात विश्व में सर्वाधिक है संयुक्त अरब अमीरात फ्रांस जापान लेटविया✔ प्रश्न 6 भारत में 1 हेक्टेयर कृषि भूमि पर कितने व्यक्ति आश्रित है 5✔ 15 12 0.4 प्रश्न 7 निम्न जनसंख्या वाला महादेश कौन है दक्षिण अमेरिका  ओसियन ✔ अफ्रीका  एशिया  प्रश्न 8 प्रौढ़ आयु वर्ग से क्या तात्पर्य है 15 से 59 बर्ष ✔ 10 से 40 बर्ष 20 से 60 बर्ष 5 से 35 बर्ष प्रश्न 9 निम्नलिखित में से कौन सा आयु वर्ग नहीं है 0–14 बर्ष 15–59 बर्ष 6...
recent posts

Railway group D syllabus 2019 (level 1)&exam pattern details in english

Image
RRB GROUP D LEVEL-1 2019  RRC Group D Level-1 Syllabus 2019:  The Railway Recruitment Board (RRBs) has released the  RRC Group D Level-1 2019 notification to recruit 1,03,769 vacancies for the posts of Track Maintainer Grade-IV, Helper/Assistant, Assistant Pointsman, Level-I posts in Indian Railways . A total of around 1.3 lakh vacancies have been announced by RRB this year. With the release of Railway Recruitment Board (RRBs) also published the latest exam pattern and syllabus for RRC Group D Level-I 2019 exam. The questions will be based on following mentioned RRC Group D syllabus exam pattern. Thus, we're providing you with RRC Group D topic-wise syllabus along with exam pattern. To ace RRC Group D Level-1 2019 Exam, it is necessary to know the Exam pattern and detailed syllabus of RRC Group D exam. This will help you to prepare judiciously for RRC Group D Level-1 2019 Exam. Let’s understand the RRC Group D Level-1 2019 Exam Pattern & Syllabus. The RRC G...
recent posts