Instrumentation Transducers

Displacement to Pressure Transducers

Question 1
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents the correct relation between pressure and displacement in flapper nozzle system?
Direct proportionality
Inverse proportionality
Equal
None of the mentioned
Explanation:
In flapper nozzle system, as the displacement between flapper and nozzle increases, pressure decreases.
Question 2
Marks : +2 | -2
Pass Ratio : 50%
Which of the following uses displacement to pressure conversion?
Flapper nozzle system
Gyroscope
Viscometer
None of the mentioned
Explanation:
Flapper nozzle system is an example of displacement to pressure conversion system, in which displacement between flapper and nozzle is proportional to the pressure of outflow.
Question 3
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents normal value for Pout/Pin?
Less than 0.2
Between 0.2 and 0.75
Between 0.75 and 1
Greater than 1
Explanation:
Practically ratio of output pressure and input pressure has a value between 0.2 and 0.75.
Question 4
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents condition for a volume of chamber?
As large as possible
Limited to 5 cc
AS small as possible
No limit
Explanation:
Volume of the chamber is limited to 5cc for reducing the time constant.
Question 5
Marks : +2 | -2
Pass Ratio : 50%
Range of displacement of flapper required to change output pressure over the useful range is known as ___________
Cut-off displacement
Throttling range
Threshold value
Break value
Explanation:
Value of the throttling range should be as low as 0.1mm.
Question 6
Marks : +2 | -2
Pass Ratio : 50%
Which of the following is correct for flapper nozzle system?
Used in hydraulic system only
Used in pneumatic system only
Used in both hydraulic and pneumatic system
None of the mentioned
Explanation:
Flapper nozzle system can be used in both hydraulic and pneumatic systems.
Question 7
Marks : +2 | -2
Pass Ratio : 50%
Which of the condition is applicable for flapper nozzle system?
Measuring air should be free from dust
Measuring air must be of constant pressure
Measuring air should be of free from dust and of constant pressure
None of the mentioned
Explanation:
For passing air through flapper nozzle system, it should be of constant pressure and free from any dust particles.
Question 8
Marks : +2 | -2
Pass Ratio : 50%
Displacement to pressure systems are used for measuring ___________
Displacement
Velocity
Acceleration
Force
Explanation:
In displacement to pressure conversion system, Pressure corresponding to displacement is measured.
Question 9
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents ideal flapper nozzle system?
Ratio of output and input pressure 0.75 at displacement = 0
Ratio of output and input pressure 1 at displacement = 0
Ratio of output and input pressure 0.5 at displacement = 0
Ratio of output and input pressure 0 at displacement = 0
Explanation:
Ideally pressure of inflow and outflow are equal at zero displacement, that is the ratio of output and input pressure will be 1.
Question 10
Marks : +2 | -2
Pass Ratio : 50%
At which point of displacement pressure chara has maximum slope?
0.14(di/dt)2
(di/dt)
0.5(di/dt)2
None of the mentioned
Explanation:
At displacement of 0.14(di/dt)2, displacement to pressure characteristic is found to have maximum slope.