Robotics Week 2 NPTEL Assignment Answers 2025

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✅ Subject: Robotics
📅 Week: 2
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Robotics Week 2 Assignment Answers 2025

1. A robotic gripper is called an active gripper, if

a. it is equipped with sensor(s).
b. it is not equipped with sensor(s).
c. it is not equipped with an actuator.
d. it is not equipped with gripping fingers.

Answer : See Answers 

2. A soft gripper has the following type of contact between its finger(s) and an object:

a. Point contact
b. Area contact
c. Neither point nor area contact
d. Both the point and area contacts

Answer :

3. To grip thin steel plates, which one of the following grippers is recommended?

a. Gripper using swing-block mechanism
b. Gripper with cam actuation
c. Gripper with rotary actuation
d. Vacuum gripper

Answer :

4. Magnetic gripper will be able to grip the

a. objects made of various steels except stainless steel.
b. objects made of stainless steel only.
c. objects made of neither ordinary steels nor stainless steel.
d. objects made of both ordinary steels and stainless steel.

Answer :

5. To solve the task related to robotic insertion of a peg into the hole, which one of the following grippers can be used?

a. Passive gripper
b. Magnetic gripper
c. Vacuum gripper
d. Adhesive gripper

Answer : See Answers 

6. Which one of the following statements is true?

a. Resolution, Accuracy and Repeatability of a robot are the same thing.
b. Resolution and Accuracy of a robot are the same thing but Repeatability is different from the others.
c. Accuracy and Repeatability of a robot are the same thing but Resolution is different from the others.
d. Resolution, Accuracy and Repeatability of a robot are not exactly the same thing.

Answer :

7. Robot Simulator is

a. a simulation package developed based of software.
b. a physical robot, which is kinematically equivalent to the main robot to be taught.
c. used for off-line teaching.
d. nothing but a teach-pendant

Answer :

8. To carry out economic analysis, rate of return on investment is calculated as the

a. ratio of capital investment to net savings after the payment of tax.
b. ratio of net savings after the payment of tax to capital investment.
c. summation of net savings after the payment of tax and capital investment.
d. multiplication of net savings after the payment of tax and capital investment.

Answer :

9. To represent orientation/rotation of a 3-D object in 3-D space, we need

a. 3×3 matrix
b. 4×4 matrix
c. 5×5 matrix
d. 6×6 matrix

Answer :

10. Techno-economical life of a robot is defined as the

a. summation of its technical life and economical life.
b. multiplication of its technical life and economical life.
c. Union of its technical life and economical life.
d. Intersection of its technical life and economical life.

Answer : See Answers 

NPTEL Robotics Week 2 Assignment Answers 2024

1. Which one of the following statements is FALSE? Resolution of a Robot

a. is similar to the least count of a measuring device.
b. is the smallest allowable position increment of a robot
c. is a positive quantity only.
d. may take the negative value also.

✅ Answer: d
📘 Explanation:
Resolution is the smallest change in position a robot can detect or move to, similar to least count. It is always a positive quantity and cannot be negative. So option d is false.

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2. Which one of the following statements is FALSE?

a. Accuracy of a Robot may take either positive or negative value.
b. Repeatability of a Robot may take either positive or negative value.
c. Accuracy of a Robot is exactly the same with its Repeatability.
d. Accuracy of a Robot is not exactly the same with its Precision.

✅ Answer: c
📘 Explanation:
Accuracy and repeatability are different characteristics. A robot can be repeatable (consistently hitting the same point) but not accurate (not hitting the target point). So option c is false.

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3. Telesurgery uses

a. one free-flying Robot.
b. one micro-capsule multi-legged Robot.
c. two Robots, one is called the Master and the other one is Slave.
d. none of the above.

✅ Answer: c
📘 Explanation:
In telesurgery, the surgeon controls the Master robot, and the actual operation is done by the Slave robot. This allows remote surgeries.

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4. Robot Simulator

a. is a Simulation package used for Manual Teaching.
b. is a Physical Robot used for Manual Teaching.
c. is a Simulation package used for Lead-through Teaching.
d. is a Physical Robot used for Lead-through Teaching.

✅ Answer: d
📘 Explanation:
In Lead-through teaching, the operator physically guides the robot. A physical robot is needed for this, not a simulator.

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5. To carry out Economic Analysis of a Robot, which one of the following statements is FALSE?

a. Depreciation of a Robot is defined as its falling value with age.
b. Pay-back period of a Robot is preferred to be less than its Techno-economic Life.
c. Rate of Return on Investment is preferred to be more than the Rate of Bank Interest.
d. Rate of Return on Investment is preferred to be less than the Rate of Bank Interest.

✅ Answer: d
📘 Explanation:
You want your investment (robot) to give higher returns than what you would earn from the bank interest. Hence, d is false.

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6. Let us assume that Technical Life of a Robot is 20 years, and its Economic Life is 15 years. Its Techno-Economic Life will become equal to

a. 20+15=35 Years.
b. 20-15=5 Years
c. 15 Years
d. 20 Years

✅ Answer: c
📘 Explanation:
Techno-Economic Life = Minimum of (Technical Life, Economic Life)
So, Techno-Economic Life = min(20, 15) = 15 years.

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7. To grasp stainless steel plate using a Robot, which one of the following grippers could not be used at all?

a. Magnetic Gripper.
b. Vacuum Gripper.
c. Gripper with Cam actuation.
d. Gripper with Swing-Block Mechanism.

✅ Answer: a
📘 Explanation:
Stainless steel is non-magnetic, so magnetic grippers won’t work. All other options are mechanical or vacuum-based, and can grasp such material.

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8. Remotely Operated Vehicle (ROV) and Autonomous Underwater Vehicle (AUV) used for under-water applications, should have

a. Centralized Control only.
b. De-Centralized Control only.
c. Centralized and De-Centralized Controls, respectively.
d. De-Centralized and Centralized Controls, respectively.

✅ Answer: c
📘 Explanation:
ROV is remotely operated → needs centralized control.
AUV is autonomous → needs de-centralized control (local decision-making).

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9. Robot is

a. a computer-controlled automatic machine used for piece production.
b. a computer-controlled automatic machine used for batch production.
c. a computer-controlled automatic machine used for mass production.
d. none of the above.

✅ Answer: b
📘 Explanation:
Robots are best suited for batch production due to their flexibility and programmability. Mass production is often handled by fixed automation.

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10. To insert a Peg into the Hole, which one of the following grippers would be recommended?

a. Vacuum Gripper
b. Magnetic Gripper
c. Gripper with Cam actuation
d. Passive Gripper

✅ Answer: d
📘 Explanation:
Passive grippers can compensate for small misalignments, making them ideal for peg-in-hole operations where precise alignment is tricky.