1. Which of the following statements is true about vertical speed indicator (VSI) and pressure? Select one: a.VSI readings are accurate at level flight since the case pressure matches the diaphragm pressure b.VSI readings are accurate during climb since the case pressure matches the diaphragm pressure c.VSI readings are accurate during descent since the case pressure matches the diaphragm pressure d.VSI readings are not sensitive to changes in case and diaphragm pressures 2. Consider a converging nozzle with a low velocity at the inlet and sonic velocity at the exit plane. Now the nozzle exit diameter is reduced by half while the nozzle inlet temperature and pressure are maintained the same. The nozzle exit velocity will Select one: a. go down to one-fourth b. double c. quadruple d. remain the same
1. Which of the following statements is true about vertical speed indicator (VSI) and pressure? Select one: a.VSI readings are accurate at level flight since the case pressure matches the diaphragm pressure b.VSI readings are accurate during climb since the case pressure matches the diaphragm pressure c.VSI readings are accurate during descent since the case pressure matches the diaphragm pressure d.VSI readings are not sensitive to changes in case and diaphragm pressures 2. Consider a converging nozzle with a low velocity at the inlet and sonic velocity at the exit plane. Now the nozzle exit diameter is reduced by half while the nozzle inlet temperature and pressure are maintained the same. The nozzle exit velocity will Select one: a. go down to one-fourth b. double c. quadruple d. remain the same
Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Jack Erjavec, Rob Thompson
Chapter55: Air-conditioning Diagnosis And Service
Section: Chapter Questions
Problem 10RQ: A very important part of a performance test on an A/C system is a pressure test. Pressure also is...
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1. Which of the following statements is true about vertical speed indicator (VSI) and pressure?
Select one:
a.VSI readings are accurate at level flight since the case pressure matches the diaphragm pressure
b.VSI readings are accurate during climb since the case pressure matches the diaphragm pressure
c.VSI readings are accurate during descent since the case pressure matches the diaphragm pressure
d.VSI readings are not sensitive to changes in case and diaphragm pressures
2. Consider a converging nozzle with a low velocity at the inlet and sonic velocity at the exit plane. Now the nozzle exit diameter is reduced by half while the nozzle inlet temperature and pressure are maintained the same. The nozzle exit velocity will
Select one:
a. go down to one-fourth
b. double
c. quadruple
d. remain the same
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