1. Inductive proximity sensors can be effective only when the objects are
of _____ materials. (A) Ferro magnetic
(B) Diamagnetic
(C) Paramagnetic
(D) All of the above
Ans= D
2. ‘Any radiation of appropriate wavelength fall on the depletion layer of
p-n junction develops a potential difference between the junction’ is
working principle of
(A) Hall Effect sensor
(B) Proximity sensor
(C) Light sensor
(D) All of the above
Ans=C
3. Function of transducer is to convert
A. Electrical signal into non electrical quantity
B. Non electrical quantity into electrical signal
C. Electrical signal into mechanical quantity
D. All of these
Ans= B
4. Strain gauge is a
A. Active device and converts mechanical displacement into a change of
resistance
B. Passive device and converts electrical displacement into a change of
resistance
C. Passive device and converts mechanical displacement into a change of
resistance
D. Active device and converts electrical displacement into a change of
resistance
Ans= C
5. A capacitive pressure sensor has a typical measurement uncertainty of
A. ± 0.2%
B. ± 0.4%
C. ± 0.1%
D. ± 0.8%
Ans= A
6. For the measurement of high pressure with high accuracy the device
used is
A. Manganin wire pressure
B. Ionization gauge
C. Dead weight gauge
D. Bourdon tubes
Ans=A
7. In fibre-optic level sensors, the amount of light loss depends on
A. The proportion of cable that is submerged in the liquid
B. Amount of light which is reflected back
C. The proportion of cable that is not in the liquid
D. Amount of light which is not reflected back
Ans=A
8. The basic difference between square wave and pulse generator is their
A. Waveforms shape
B. Duty cycles
C. Frequency range
D. Cost
Ans= B
9. Touch screen of mobile phone uses:
1. AFR Sensor
2. Pellistor
3. Viscometer
4. Tactile sensors
Ans=4
10. DHT22 sensor is used to sense:
1. Obstacles
2. Resistance
3. Position
4. Humidity
Ans=4
11. Following is (are) true for Hall Effect sensors. A. They can operate as switches of high frequency
B. They cost less than electromechanical switches
C. They are free from contact bounce problem
D. All of the above
Ans= D
12. Sensitivity of a sensor can be depicted by
A. Nyquist plot
B. Pole- zero plot
C. Bode plot
D. None of the mentioned
Ans= C
13. Why are electromechanical relays more popular than solid State relay
1. They are reliable
2. Less costly
3. Both 1 and 2
4. None of theabove
Ans= 3
14. In pneumatic system,AND gate is also known as
1. Check valve
2. Shuttle valve
3. Daul pressure valve
4. None of the above
Ans= 3
15. Which of the following logic valve is known as shuttle valve
1. OR gate
2. AND gate
3. NOR gate
4. NAND
Ans-= 1
16. Overlapping of signals in pneumatic system can be avoided by using
1. Rolling level valve
2. Idle roller level valve
3. Both 1 and 2
4. None of the above
Ans= c
17. How is proximity switch differentiated from limit switch
1. Proximity switch is activated when moving parts have physical contact
with it
2. Proximity switch is activated when non moving parts have physical
contact
3. Proximity switch is activated when moving parts are close to it
4. None of the above
Ans= 3
18. In electro pneumatic circuit
1. Spool is shifted by signal air
2. Spool is shifted by control air
3. Spool is shifted by electromotive force
4. All the above
Ans= 3
19.The process of using known data to estimate values at unknown
locations is called
a) Acquisition
b) Interpolation
c) Pixelation
d) None of the Mentioned
Ans= b
20. _____________ is the effect caused by the use of an insufficient
number of intensity levels in smooth areas of a digital image. a) Gaussian smooth
b) Contouring
c) False Contouring
d) Interpolation
Ans=C
BEST OF LUCK
No comments:
Post a Comment