Mechatronics & Automation

JKSSB Sub-Inspector (Telecommunication) · IoT, Embedded Systems & Mechatronics · 15 practice questions with answers and explanations: 10 Easy, 5 Medium, 0 Hard.

Sample questions

Sample Easy question 1

An open-loop control system:

  1. Always uses feedback
  2. Cannot be automated
  3. Uses alone sensors
  4. Does not use feedback from the output
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Answer: D. A basic toaster timer is an open-loop system.

Sample Easy question 2

Which actuators are best for producing very large forces in heavy machinery?

  1. Pneumatic actuators
  2. Small relays
  3. Piezo buzzers
  4. Hydraulic actuators
Show answer

Answer: D. Incompressible oil lets hydraulic actuators deliver very high force.

Sample Easy question 3

What does 'degrees of freedom' (DOF) mean for a robot arm?

  1. The number of its power supplies
  2. The number of its programs
  3. The number of its sensors
  4. The number of independent motions its joints can make
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Answer: D. A typical industrial robot arm has six degrees of freedom.

Sample Medium question 4

Which actuators use compressed air to produce motion?

  1. Piezoelectric actuators
  2. Hydraulic actuators
  3. Pneumatic actuators
  4. Thermal actuators
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Answer: C. Pneumatic systems use air, while hydraulic systems use oil.

Sample Medium question 5

What do the letters in a PID controller stand for?

  1. Pressure, Intensity, Damping
  2. Proportional, Integral, Derivative
  3. Primary, Internal, Direct
  4. Power, Input, Drive
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Answer: B. A PID controller combines three terms based on the error.

Sample Medium question 6

Which programming language style is most commonly used to program PLCs?

  1. HTML
  2. Assembly alone
  3. Prolog
  4. Ladder logic
Show answer

Answer: D. Ladder diagrams resemble relay wiring diagrams.

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