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The menual of a car instructs the owner to inflate the tyres to pressure of 200 kPa. (a) What is the recommended gauge pressure ? (b) What is the recommended absolute pressure ? (c ) If after the required inflation of the tyres, the car is driven to a mountain peak. where the atmospheric pressrre is 10 % below that at sea level, what will be the tyre gauge read ? Atmospehric pressure=1.01 xx 10^5Pa.

Answer» <html><body><p></p>Solution :(a) Pressure Instructed by manual = `P_(g) = <a href="https://interviewquestions.tuteehub.com/tag/200-288914" style="font-weight:bold;" target="_blank" title="Click to know more about 200">200</a> K P_(a)` <br/> (b) Absolute Pressure = `101 k P_(a) + 200 k P_(a) = 301 k P_(a)` <br/> At <a href="https://interviewquestions.tuteehub.com/tag/mountain-565001" style="font-weight:bold;" target="_blank" title="Click to know more about MOUNTAIN">MOUNTAIN</a> <a href="https://interviewquestions.tuteehub.com/tag/peak-1149480" style="font-weight:bold;" target="_blank" title="Click to know more about PEAK">PEAK</a> Pa′ is 10% less <br/> `P_(a)=<a href="https://interviewquestions.tuteehub.com/tag/90-341351" style="font-weight:bold;" target="_blank" title="Click to know more about 90">90</a> kP_(a)`<br/> If we <a href="https://interviewquestions.tuteehub.com/tag/assume-384429" style="font-weight:bold;" target="_blank" title="Click to know more about ASSUME">ASSUME</a> absolute pressure in tyre does not change during driving then <br/> `P_(g) = P – P_(a)′ = 301 – 30 = 211 k P_(a)` <br/> So the tyre will read 211 k `P_(a)`, pressure.</body></html>


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