Drone Systems and Control Nptel Week 1 Answers
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Drone Systems and Control Nptel Week 1 Answers (July-Dec 2025)
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Question 1. What is a key advantage of fixed-wing drones over multirotor drones?
a) Vertical take-off
b) Longer flight duration
c) Stable hovering
d) Easier control for beginners
Question 2. In a hybrid VTOL drone, which mechanism allows it to switch from vertical lift to forward flight?
a) Tilt-rotor system
b) Balloon inflation system
c) Swashplate actuator
d) Magnetic rotor coupling
Answer: Answers will be updated soon
Question 3. In drone terminology, what is a “failsafe” feature?
a) A backup battery
b) An emergency parachute
c) A system that safely returns the drone home if signal is lost
d) A GPS booster for better navigation
These are Drone Systems and Control Nptel Week 1 Answers
Question 4. What is geofencing in drone operations?
a) A technique to protect propellers from damage
b) A method to prevent drones from flying into restricted zones
c) A system to guide drones using magnetic fields
d) A feature for stabilizing drone during windy conditions
Question 5. What provides lift to a multirotor drone like a quadcopter?
a) Fixed wings
b) Rotating blades (propellers)
c) Balloon mechanism
d) Gliding motion
Question 6. Why are counter-rotating propellers used in quadcopters?
a) To increase the speed
b) To reduce battery consumption
c) To cancel out rotational torque
d) To boost vertical thrust
These are Drone Systems and Control Nptel Week 1 Answers
Question 7. Which aerodynamic principle explains lift generation in drone propellers?
a) Newton’s First Law
b) Bernoulli’s Principle
c) Archimedes’ Principle
d) Hooke’s Law
Question 8. What happens when all propellers of a quadcopter rotate in the same direction?
a) The drone flies faster
b) The drone hovers more stably
c) The drone starts spinning uncontrollably
d) The drone saves power
These are Drone Systems and Control Nptel Week 1 Answers
Question 9. In drone flight dynamics, rotational motion about the drone’s longitudinal axis is referred to as:
a) Pitch
b) Roll
c) Yaw
d) Surge
Question 10. A quadcopter in a hover experiences no net translation because:
a) All thrust vectors cancel each other out
b) All propellers rotate in the same direction
c) The net force equals zero and torque equals zero
d) Its moment of inertia is infinite
Question 11. If a drone’s center of mass shifts due to payload, which aspect of its rigid body motion is most directly affected?
a) Linear acceleration only
b) Angular velocity distribution
c) Moment of inertia and dynamic stability
d) Rotor torque profile remains unchanged
Question 12. During a pitch maneuver (nose up), what type of motion is primarily occurring?
a) Translation in the X-direction
b) Rotation about the lateral axis
c) Rotation about the vertical axis
d) Translation in the Z-direction
These are Drone Systems and Control Nptel Week 1 Answers
Question 13. Which of the following actions would cause pure translation in a drone (no rotation)?
a) Increasing speed of diagonal rotors
b) Equal thrust increase in all four rotors
c) Spinning two opposite rotors faster
d) Tilting the drone via asymmetric thrust
Question 14. Why is the moment of inertia crucial in drone attitude control?
a) It determines the battery consumption
b) It controls air resistance
c) It affects torque required for rotational acceleration
d) It is used only for altitude holding
Question 15. A drone performs a coordinated turn (banked yaw with no lateral slip). Which type of motion best describes this?
a) Rigid body translation
b) Pure yaw
c) Coupled translation and rotation
d) Independent axis motion
These are Drone Systems and Control Nptel Week 1 Answers
