Chapter Exam

Chapter-8 Introduction to Robotics — Online MCQ Test

Q: Which of the following is an example of an actuator in a robot?

Answer: A. Motor or servo motor — Actuators are devices that convert electrical signals into physical motion; motors and servo motors are common examples.

INFORMATION TECHNOLOGY · Grade 7 · CBSE(NCERT)

Practice Chapter-8 Introduction to Robotics with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 7 INFORMATION TECHNOLOGY. This chapter covers: robots - actuators - sensors - microcontrollers - autonomous systems - robotic assembly. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-8 Introduction to Robotics — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 7 INFORMATION TECHNOLOGY — Chapter-8 Introduction to Robotics, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is a robot?

A. A machine that performs tasks automatically or under human control ✓
B. A computer program only
C. A device that can only move in straight lines
D. A tool used only in factories

Answer: A. A machine that performs tasks automatically or under human control
A robot is a programmable machine capable of performing tasks autonomously or with human guidance, combining mechanical and electronic components.

Which of the following is an example of an actuator in a robot?

A. Motor or servo motor ✓
B. Temperature sensor
C. Microcontroller
D. Camera lens

Answer: A. Motor or servo motor
Actuators are devices that convert electrical signals into physical motion; motors and servo motors are common examples.

How does a robot know when to stop moving forward if it encounters an obstacle?

A. The sensor detects the obstacle and sends a signal to the microcontroller, which stops the actuator ✓
B. The robot automatically stops after a fixed time
C. The robot stops only when it runs out of battery
D. The robot never stops moving forward

Answer: A. The sensor detects the obstacle and sends a signal to the microcontroller, which stops the actuator
The feedback loop involves sensors detecting obstacles, the microcontroller processing this information, and then controlling actuators to stop movement.

Compare these two robots: Robot A uses pre-programmed paths, Robot B uses sensors and adapts to obstacles. Which is autonomous?

A. Robot B, because it senses environment and makes real-time decisions ✓
B. Robot A, because it follows exact instructions
C. Both are equally autonomous
D. Neither can be considered autonomous

Answer: A. Robot B, because it senses environment and makes real-time decisions
Autonomous robots use sensors to perceive their environment and make adaptive decisions, rather than rigidly following pre-set paths regardless of conditions.

In space exploration, why are autonomous robots preferred over remote-controlled robots?

A. Signal delays make real-time remote control impractical; autonomous robots must sense and decide independently ✓
B. Autonomous robots never need maintenance
C. Remote control is impossible because of cost only
D. Autonomous robots can think like humans

Answer: A. Signal delays make real-time remote control impractical; autonomous robots must sense and decide independently
Communication delays from Earth to space vehicles are too long for real-time remote control; autonomous systems with onboard intelligence are essential.