Actuator and Output Devices MCQ’s

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This set of Mechatronics Multiple Choice Questions & Answers (MCQs) focuses on “Actuator and Output Devices”.

1. Who invented hydraulic press?
a) Norbert wiener
b) Joseph Bramah
c) Charles young
d) Charles wheatstone

2. What is the push provided by a hydraulic fluid used in fluid based actuator, if a steel ball of radius 3cm is immersed in it, Given that the fluid has a density of 1200kg/m3, Take g=10m/s2?
a) 1.695N
b) 3.2N
c) 2.26N
d) 1.356N

3. Which is not an output device?
a) Seven Segment display
b) Liquid crystal display
c) Lithium battery indicator
d) Lithium battery

4. What is the push provided by water used in fluid based actuator, if a wooden ball of radius 3cm is immersed in it, Given that the water has a density of 1000kg/m3, wood has a density of 900kg/m3, Take g=10m/s2?
a) 1.695N
b) 3.2N
c) 2.26N
d) 1.13N

5. Archimedes principle depends on the density of the immersed object.
a) True
b) False

6. Where will the push provided by a fluid of hydraulic piston will be more? (Consider the pistons are cylindrical and have same height)
a) Wooden piston of density 900 Kg/m3 and radius 6 cm
b) Iron piston of density 7850 Kg/m3 and radius 5 cm
c) Copper piston of density 8940 Kg/m3 and radius 5 cm
d) Glass piston of density 2580 Kg/m3 and radius 3 cm

7. The ON and OFF time of a buzzer can be controlled using PLC control system.
a) True
b) False

8. What is the push provided by a hydraulic fluid used in fluid based actuator, if a steel ball of radius 3cm is immersed in it, Given that the fluid has a density of 2000kg/m3, Take g=10m/s2?
a) 5N
b) 3.2N
c) 2.26N
d) 4N

9. How many LED’s (Light Emitting Diodes) are present in 7 segment display?
a) 6
b) 7
c) 8
d) 9

10. What is the push provided by a fluid used in fluid based actuator, if a plastic ball of radius 4cm is immersed in it, Given that the fluid has a density of 1100kg/m3, plastic has a density of 800kg/m3, Take g= 10m/s2?
a) 1.695N
b) 2.9469N
c) 2.26N
d) 1.13N

11. How many columns of pixel matrix are present in 16*2 display?
a) 10
b) 12
c) 2
d) 16

12. Generator is a rotary actuator.
a) True
b) False

13. Motor is a rotary actuator.
a) True
b) False

14. How many pixels are there in 16*2 displays?
a) 1000
b) 1200
c) 1120
d) 1100

15. What is the push provided by a hydraulic fluid used in fluid based actuator, if a steel ball of radius 3cm is immersed in it, Given that the fluid has a density of 1500kg/m3, Take g=10m/s2?
a) 1.695N
b) 3.2N
c) 2.26N
d) 4N

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