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.

Q: What is the primary function of a sensor in a robot?

Answer: A. To detect and measure environmental conditions — Sensors collect data from the environment such as light, temperature, distance, and obstacles, enabling the robot to respond appropriately.

Q: What is a microcontroller?

Answer: A. A small computer that controls robot functions — A microcontroller is a compact programmable device that processes sensor inputs and controls actuators to manage robot behavior.

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.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

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.

What is the primary function of a sensor in a robot?

A. To detect and measure environmental conditions ✓
B. To provide power to the robot
C. To move the robot parts
D. To display information on a screen

Answer: A. To detect and measure environmental conditions
Sensors collect data from the environment such as light, temperature, distance, and obstacles, enabling the robot to respond appropriately.

What is a microcontroller?

A. A small computer that controls robot functions ✓
B. A type of sensor
C. A mechanical part of a robot
D. A power supply unit

Answer: A. A small computer that controls robot functions
A microcontroller is a compact programmable device that processes sensor inputs and controls actuators to manage robot behavior.

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.

In a robotic assembly line, what is the role of the microcontroller?

A. It processes sensor data and makes decisions to control the robot's actions ✓
B. It provides physical strength to lift heavy objects
C. It detects the position of objects only
D. It supplies power to all robot components

Answer: A. It processes sensor data and makes decisions to control the robot's actions
The microcontroller acts as the robot's 'brain', interpreting sensor inputs and commanding actuators to perform assembly tasks.

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 a robotic assembly line, if a microcontroller malfunctions but all sensors and actuators work fine, what would happen?

A. The robot cannot coordinate sensor inputs to control actuators; assembly tasks would fail ✓
B. The sensors would control the actuators directly without any problem
C. The actuators would work but move very slowly
D. The robot would continue normal operation without any changes

Answer: A. The robot cannot coordinate sensor inputs to control actuators; assembly tasks would fail
The microcontroller is the robot's 'brain' that interprets sensor data and commands actuators; without it, there is no coordination or decision-making.

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.

A student designs a robot with advanced sensors but poor microcontroller logic. What will be the primary limitation?

A. Excellent sensor data will be wasted due to poor decision-making algorithms; the robot cannot utilize its sensing capabilities effectively ✓
B. Expensive sensors guarantee perfect robot performance
C. The microcontroller quality is irrelevant if sensors are good
D. Poor logic improves sensor accuracy

Answer: A. Excellent sensor data will be wasted due to poor decision-making algorithms; the robot cannot utilize its sensing capabilities effectively
Sensors are only valuable if the microcontroller intelligently processes their data; poor algorithms mean good sensor data leads to poor decisions and actions.

← Previous Chapter

Chapter-7 Emerging Technologies (AI & IoT)