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Worksheetsnptel drone week 1
Total questions: 40
Worksheet time: 20mins
What is a key advantage of fixed-wing drones over multirotor drones?
Vertical take-off
Longer flight duration
Stable hovering
Easier control for beginners
In a hybrid VTOL drone, which mechanism allows it to switch from vertical lift to forward flight?
Tilt-rotor system
Balloon inflation system
Swashplate actuator
Magnetic rotor coupling
In drone terminology, what is a “failsafe” feature?
A backup battery
An emergency parachute
A system that safely returns the drone home if signal is lost
A GPS booster for better navigation
What is geofencing in drone operations?
A technique to protect propellers from damage
A method to prevent drones from flying into restricted zones
A system to guide drones using magnetic fields
A feature for stabilizing drones during windy conditions
What provides lift to a multirotor drone like a quadcopter?
Fixed wings
Rotating blades (propellers)
Balloon mechanism
Gliding motion
Why are counter-rotating propellers used in quadcopters?
To increase the speed
To reduce battery consumption
To cancel out rotational torque
To boost vertical thrust
Which aerodynamic principle explains lift generation in drone propellers?
Newton’s First Law
Bernoulli’s Principle
Archimedes’ Principle
Hooke’s Law
What happens when all propellers of a quadcopter rotate in the same direction?
The drone flies faster
The drone hovers more stably
The drone starts spinning uncontrollably
The drone saves power
In drone flight dynamics, rotational motion about the drone's longitudinal axis is referred to as:
Pitch
Roll
Yaw
Surge
A quadcopter in a hover experiences no net translation because:
All thrust vectors cancel each other out
All propellers rotate in the same direction
The net force equals zero and torque equals zero
Its moment of inertia is infinite
If a drone’s center of mass shifts due to payload, which aspect of its rigid body motion is most directly affected?
Linear acceleration only
Angular velocity distribution
Moment of inertia and dynamic stability
Rotor torque profile remains unchanged
During a pitch maneuver (nose up), what type of motion is primarily occurring?
Translation in the X-direction
Rotation about the lateral axis
Rotation about the vertical axis
Translation in the Z-direction
Which of the following actions would cause pure translation in a drone (no rotation)?
Increasing speed of diagonal rotors
Equal thrust increase in all four rotors
Spinning two opposite rotors faster
Tilting the drone via asymmetric thrust
Why is the moment of inertia crucial in drone attitude control?
It determines the battery consumption
It controls air resistance
It affects torque required for rotational acceleration
It is used only for altitude holding
A drone performs a coordinated turn (banked yaw with no lateral slip). Which type of motion best describes this?
Rigid body translation
Pure yaw
Coupled translation and rotation
Independent axis motion
Which part of a drone converts electrical energy into mechanical thrust?
Flight controller
Electronic Speed Controller
BLDC motor
GPS module
What is the main function of the flight controller in a UAV?
Generate lift
Stabilize and control the drone
Supply power to the ESC
Store flight footage
The key parameter that affects the drone’s endurance is:
Propeller pitch
Battery capacity
Motor Kv rating
Airframe color
The lift generated by drone propellers depends on:
Propeller speed and air density
ESC firmware version
Type of GPS module
Battery connector
Which sensor measures angular velocity for drone stabilization?
Barometer
Gyroscope
Magnetometer
GPS
The accelerometer in a drone helps to detect:
Rotational motion
Linear acceleration
GPS position
Motor temperature
Which of the following is a limitation of multirotor drones?
Low maneuverability
Shorter flight duration
Low control precision
Heavy payload capacity
What type of drone uses flapping-wing motion similar to birds?
Rotary-wing
Fixed-wing
Ornithopter
VTOL
The aerodynamic drag on a drone increases with:
Decrease in airspeed
Increase in airspeed
Constant altitude
Low thrust
In drone dynamics, yaw is rotation about the:
Longitudinal axis
Vertical axis
Lateral axis
Roll axis
The pitch motion of a quadcopter is controlled by changing the speed of:
All four rotors equally
Front and rear rotors
Left and right rotors
Diagonal rotors
The roll motion in a quadcopter is generated by varying thrust between:
Front and rear rotors
Left and right rotors
All rotors equally
Only rear rotors
What is the typical operating frequency for GPS modules in drones?
1.575 GHz
2.4 GHz
900 MHz
433 MHz
Which component controls the rotational speed of a BLDC motor?
Battery
ESC
Flight controller
Receiver
The torque of a BLDC motor increases with:
Higher current
Lower voltage
Higher frequency
Reduced propeller diameter
What is the main role of the Electronic Speed Controller (ESC)?
Convert DC to AC for BLDC motors
Stabilize the flight attitude
Measure propeller thrust
Control camera movement
Which type of battery is most commonly used in UAVs?
NiMH
LiPo
Lead-acid
NiCd
The C-rating of a LiPo battery represents:
Total capacity
Maximum safe discharge rate
Number of cells
Battery weight
A drone’s flight time can be increased by:
Increasing payload
Reducing weight and improving propeller efficiency
Using smaller ESCs
Reducing motor RPM
During take-off, the thrust generated must be:
Equal to the drone’s weight
Greater than the drone’s weight
Less than the drone’s weight
Half of the drone’s drag
The PID controller in a flight control system adjusts:
Rotor blade pitch
Motor speed to maintain stability
Battery voltage
Camera angle
The “D” term in a PID controller is used to:
Measure steady-state error
Predict future error
Eliminate offset
Increase proportional gain
The GPS module in a drone helps in:
Attitude estimation
Position and navigation
Power management
Communication between ESCs
Which sensor helps the drone maintain altitude by measuring air pressure?
Magnetometer
Barometer
Gyroscope
Thermometer
In a quadcopter, what ensures stability during hover?
Equal thrust from all motors
Higher thrust from front motors
Increased yaw rate
Reduced roll
