NPTEL Advanced Robotics Week 1 Assignment Answers 2025
1. The writer who used the word ‘robotics’ was
- Al-Jazari
- Satoshi Shegemi
- Ichiro Kato
- Isaac Asimov
Answer :- d
2. Industry 4.0 deals with
- Cyber Physical Systems that interconnect machines and machines
- Development of AI
- Cyber Physical Systems that interconnect machines, humans and AI.
- Brain computer interfacing
Answer :- c
3. To be called a robot a system should do some or all of the following:
- Interact with the environment
- Re programmable
- Move around, sense the environment and display intelligent behaviour
- Follow human’s instructions
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4. The Degree of Freedom of the prismatic and spherical joints are respectively
- 1 and 3
- 3 and 1
- 1 and 2
- 2 and 1
Answer :-
5. A cylinder is kept on a table on its base. How many degrees of freedom are required by a robot to pick up the cylinder and keep it at another place on the table on its base (flat surface of cylinder is parallel to table surface)?
- 2
- 3
- 4
- 5
Answer :-
6. The work volume of a cartesian robot having four prismatic joints of unequal length is a:
- Sphere
- Cube
- Cuboid
- Ellipsoid
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7. The position of a point is represented by three coordinates (x,y,z) while orientation of a rigid body is represented by a
- a position vector and an angle
- a position vector
- 4 x 4 matrix
- 3 x 3 matrix
Answer :-
8. Determinant of a rotation matrix is equal to
- -1
- 1
- 0.5
- 0
Answer :-
9. A frame ‘B’ is rotated by 60o about Z axis of a fixed frame ‘A’. If the coordinate of a point ‘P’ in ‘B’ is given by BP =(1, 1, 1), find its coordinate in frame ‘A’, AP = ?
- (0.36, 1.36, 1)
- (-0.36, -1.36, 1)
- (0.36, -1.36, 1)
- (-0.36, 1.36, 1)
Answer :-
10. A frame ‘B’ is rotated by 60o about X axis of a fixed frame ‘A’ and translated by (1,1,1) units in x,y,z direction of ‘A’. If the coordinate of a point BP=(2, 2, 2) find AP?
- (3, 0.26, 3.73)
- (3, -0.26, 3.73)
- (3, 0.26, -3.73)
- (-3, 0.26, 3.73)
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NPTEL Advanced Robotics Week 2 Assignment Answers 2025
1. As per the DH notation the axis of rotation or translation of a robot joint is the
- X axis
- Y axis
- Z axis
- All three of these are possible
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2. The parameter in the DH table for link angle is
- θ
- a
- α
- d
Answer :-
3. In the three DOF (3R) planer manipulator shown below, the second row
of the DH table is given by
- 0, 0, 0, θ1
- 0, 0, θ1, 0
- 0, 0, θ2, 0
- l1, 0, 0, θ2
Answer :-
4. For the manipulator shown in Q3, the third row of the DH table is given
by
- l2, 0, 0, θ3
- l2, 0, 0, θ2
- l1, 0, 0, θ1
- l1, 0, 0, θ2
Answer :-
5. In the 3DOF (2RP) manipulator shown below, the first row of the DH table
is (origin of axes 0,1,2 may be taken at the same point)
- 0, 90, d2, 0
- 0, −90, d2, 0
- 0, 0, 0, θ1
- 0, 90, 0, θ1
Answer :-
6. For the manipulator shown in Q3, the coordinates of the origin of frame 2
is given by
- l1 cos θ1, l1 sin θ1, 0
- l1 cos θ1 + l2 cos θ2, l1 sin θ1 + l2 sin θ2, 0
- l1 cos θ1 + l2 cos (θ1 + θ2), l1 sin θ1 + l2 sin (θ1 + θ2), 0
- l1 cos θ1 +l2 cos (θ1 + θ2)+l3 cos (θ1 + θ2 + θ3), l1 sin θ1 +l2 sin (θ1 + θ2)+
l3 sin (θ1 + θ2 + θ3), 0
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7. For the manipulator shown in Q3, the coordinates of the origin of frame 1
is given by
- l1 cos θ1 + l2 cos θ2 + l3 cos θ3, l1 sin θ1 + l2 sin θ2 + l3 sin θ3, 0
- l1 cos θ1 + l2 cos θ2, l1 sin θ1 + l2 sin θ2, 0
- 0, 0, 0
- l1 cos θ1, l1 sin θ1, 0
Answer :-
8. For the SCARA robot shown below, the second row of the DH table is given by (the origin of frame 0 and 1 may be taken at the same point)
- L2, 0, 0, θ2
- L1, 0, 0, θ2
- L2, 0, d3, 0
- L1, 0, 0, θ1 + θ2
Answer :-
9. For the SCARA robot shown in Q8, the third row of the DH table is given
by
- L2, 0, 0, θ2
- L4, 0, 0, θ2
- L4, 0, d3, 0
- L2, 0, d3, 0
Answer :-
10. For the SCARA robot shown in Q8, the fourth row of the DH table is
given by
- 0, 180o, L4, θ4
- 0, 0o, L4, θ4
- L4, 180o, 0, θ4
- L4, 0o, 0, θ4
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