REPL EXAM CASA EXAM 300 ACTUAL
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALE LATEST UPDATE
This comprehensive 300-question bank covers all essential content for the
CASA RePL (Remote Pilot Licence) examination. Questions address
aerodynamics, air law, meteorology, navigation, radio procedures, RPA
systems, human factors, and operational safety. Topics include Part 101
CASR regulations, cloud classifications, aerodrome operations, flight
planning, emergency procedures, aircraft performance, and RePL
certification requirements. Each question includes a correct answer and
detailed rationale explaining the regulatory, operational, and scientific
principles underlying safe RPA operations in Australian airspace. The
question bank progresses from foundational concepts to advanced operational
scenarios, ensuring thorough preparation without repetition of concepts or
scenarios.
1. Your spotter announces there is a helicopter approaching your position from 3
O'clock. Which direction can you expect the helicopter to appear?
A) North
B) East
C) South
D) West
Answer: B
Rationale: In aviation clock code, 12 o'clock is directly ahead, 3 o'clock is to the
right (east if facing north), 6 o'clock is behind, and 9 o'clock is to the left. A
helicopter at 3 o'clock will appear from the east .
2. Your aircraft is travelling on a heading of 090 degrees. However, there is a
strong wind pushing it off track from the north. Would the Track be greater or less
than 090 degrees?
A) Greater
B) Less
C) Equal
,D) Cannot be determined
Answer: A
Rationale: A heading of 090 degrees means the aircraft is pointing east. Wind from
the north pushes the aircraft southward, increasing the track angle beyond 090
degrees toward the southeast .
3. On a forecast you read that Clouds at a location are OVC. What is the OKTAS
at this location?
A) 1-2 OKTAS
B) 3-4 OKTAS
C) 5-6 OKTAS
D) 7-8 OKTAS
Answer: D
Rationale: OVC (Overcast) indicates 8 oktas of cloud cover, representing the entire
sky being covered by cloud. SKC is 0 oktas, FEW is 1-2, SCT is 3-4, BKN is 5-7,
and OVC is 8 oktas .
4. What does the term "AGL" stand for in aviation, and how is it measured?
A) Above Ground Level, measured relative to the local terrain directly beneath the
aircraft
B) Above Geographic Limit, measured from the highest obstacle in the region
C) Altitude Government Limit, measured from the pilot's takeoff point
D) Average Ground Line, measured as a mean sea level average
Answer: A
Rationale: AGL stands for Above Ground Level and represents the actual height of
the aircraft above the surface directly beneath it, which changes as the terrain
elevation changes .
5. If a Remote Pilot is operating at 350 feet AMSL over terrain that is 150 feet
above sea level, what is the aircraft's height AGL?
A) 500 feet AGL
B) 200 feet AGL
C) 350 feet AGL
D) 150 feet AGL
Answer: B
Rationale: Height AGL is calculated by subtracting the terrain elevation (150 feet)
from the altitude Above Mean Sea Level (350 feet AMSL), resulting in 200 feet
AGL .
,6. What unit of measurement is standard in aviation for expressing horizontal
aircraft speed?
A) Kilometers per hour (km/h)
B) Miles per hour (mph)
C) Knots (kt)
D) Meters per second (m/s)
Answer: C
Rationale: In aviation, the standard unit of speed is the knot (kt), which is
equivalent to one nautical mile per hour .
7. One nautical mile is mathematically equivalent to which of the following
measures?
A) Exactly 1.500 kilometers
B) One minute of latitude along any meridian
C) One degree of longitude at the equator
D) Exactly 5,280 feet
Answer: B
Rationale: One nautical mile is defined as one minute of latitude (1/60th of a
degree) along any meridian, which equates to approximately 1.852 kilometers .
8. How are the forces of lift and weight related during a stable, unaccelerated level
flight?
A) Lift is greater than weight to maintain altitude
B) Lift is equal to weight
C) Lift is less than weight due to thrust assistance
D) Lift and weight act in the same direction
Answer: B
Rationale: For an aircraft to maintain a stable, unaccelerated level flight, the
upward force of lift must exactly equal the downward force of weight .
9. Which aerodynamic force directly opposes the forward motion of an aircraft
through the air?
A) Gravity
B) Thrust
C) Drag
D) Torque
Answer: C
Rationale: Drag is the aerodynamic force that resists the forward motion of an
aircraft and acts parallel and opposite to the relative airflow .
, 10. According to Bernoulli's principle, how does the velocity of air moving over
the curved upper surface of a wing affect local pressure?
A) Air velocity increases, causing local pressure to decrease
B) Air velocity decreases, causing local pressure to increase
C) Air velocity increases, causing local pressure to increase
D) Air velocity remains constant while pressure drops
Answer: A
Rationale: Bernoulli's principle states that as the speed of a moving fluid (or air)
increases, the pressure within that fluid decreases, creating lower pressure over the
upper camber of the airfoil .
11. What is Newton's Third Law of Motion, and how does it relate to rotor blades?
A) Objects in motion stay in motion; it explains why rotors keep spinning when
powered off
B) For every action there is an equal and opposite reaction; rotors push air down,
air pushes rotors up
C) Force equals mass times acceleration; it determines rotor thrust output
D) Energy cannot be created or destroyed; it explains battery drain
Answer: B
Rationale: Newton's Third Law states that for every action there is an equal and
opposite reaction. Rotor blades generate lift by accelerating air downward, and the
air pushes back upward on the blades .
12. The four forces acting on an RPAS are:
A) Lift, Drag, Torque and Thrust
B) Lift, Weight, Thrust and Drag
C) Torque, Weight, Thrust and Drag
D) Lift, Torque, Thrust and Drag
Answer: B
Rationale: The four forces acting on any aircraft in flight are Lift (upward), Weight
(downward), Thrust (forward), and Drag (backward). Torque is a rotational force,
not one of the four primary forces .
13. An RPAS will ascend by:
A) Increase the load on all motors simultaneously
B) Decrease the load on all motors simultaneously
C) Increase the load on the clockwise spinning motors
D) Increase the load on the counterclockwise spinning motors
Answer: A
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALE LATEST UPDATE
This comprehensive 300-question bank covers all essential content for the
CASA RePL (Remote Pilot Licence) examination. Questions address
aerodynamics, air law, meteorology, navigation, radio procedures, RPA
systems, human factors, and operational safety. Topics include Part 101
CASR regulations, cloud classifications, aerodrome operations, flight
planning, emergency procedures, aircraft performance, and RePL
certification requirements. Each question includes a correct answer and
detailed rationale explaining the regulatory, operational, and scientific
principles underlying safe RPA operations in Australian airspace. The
question bank progresses from foundational concepts to advanced operational
scenarios, ensuring thorough preparation without repetition of concepts or
scenarios.
1. Your spotter announces there is a helicopter approaching your position from 3
O'clock. Which direction can you expect the helicopter to appear?
A) North
B) East
C) South
D) West
Answer: B
Rationale: In aviation clock code, 12 o'clock is directly ahead, 3 o'clock is to the
right (east if facing north), 6 o'clock is behind, and 9 o'clock is to the left. A
helicopter at 3 o'clock will appear from the east .
2. Your aircraft is travelling on a heading of 090 degrees. However, there is a
strong wind pushing it off track from the north. Would the Track be greater or less
than 090 degrees?
A) Greater
B) Less
C) Equal
,D) Cannot be determined
Answer: A
Rationale: A heading of 090 degrees means the aircraft is pointing east. Wind from
the north pushes the aircraft southward, increasing the track angle beyond 090
degrees toward the southeast .
3. On a forecast you read that Clouds at a location are OVC. What is the OKTAS
at this location?
A) 1-2 OKTAS
B) 3-4 OKTAS
C) 5-6 OKTAS
D) 7-8 OKTAS
Answer: D
Rationale: OVC (Overcast) indicates 8 oktas of cloud cover, representing the entire
sky being covered by cloud. SKC is 0 oktas, FEW is 1-2, SCT is 3-4, BKN is 5-7,
and OVC is 8 oktas .
4. What does the term "AGL" stand for in aviation, and how is it measured?
A) Above Ground Level, measured relative to the local terrain directly beneath the
aircraft
B) Above Geographic Limit, measured from the highest obstacle in the region
C) Altitude Government Limit, measured from the pilot's takeoff point
D) Average Ground Line, measured as a mean sea level average
Answer: A
Rationale: AGL stands for Above Ground Level and represents the actual height of
the aircraft above the surface directly beneath it, which changes as the terrain
elevation changes .
5. If a Remote Pilot is operating at 350 feet AMSL over terrain that is 150 feet
above sea level, what is the aircraft's height AGL?
A) 500 feet AGL
B) 200 feet AGL
C) 350 feet AGL
D) 150 feet AGL
Answer: B
Rationale: Height AGL is calculated by subtracting the terrain elevation (150 feet)
from the altitude Above Mean Sea Level (350 feet AMSL), resulting in 200 feet
AGL .
,6. What unit of measurement is standard in aviation for expressing horizontal
aircraft speed?
A) Kilometers per hour (km/h)
B) Miles per hour (mph)
C) Knots (kt)
D) Meters per second (m/s)
Answer: C
Rationale: In aviation, the standard unit of speed is the knot (kt), which is
equivalent to one nautical mile per hour .
7. One nautical mile is mathematically equivalent to which of the following
measures?
A) Exactly 1.500 kilometers
B) One minute of latitude along any meridian
C) One degree of longitude at the equator
D) Exactly 5,280 feet
Answer: B
Rationale: One nautical mile is defined as one minute of latitude (1/60th of a
degree) along any meridian, which equates to approximately 1.852 kilometers .
8. How are the forces of lift and weight related during a stable, unaccelerated level
flight?
A) Lift is greater than weight to maintain altitude
B) Lift is equal to weight
C) Lift is less than weight due to thrust assistance
D) Lift and weight act in the same direction
Answer: B
Rationale: For an aircraft to maintain a stable, unaccelerated level flight, the
upward force of lift must exactly equal the downward force of weight .
9. Which aerodynamic force directly opposes the forward motion of an aircraft
through the air?
A) Gravity
B) Thrust
C) Drag
D) Torque
Answer: C
Rationale: Drag is the aerodynamic force that resists the forward motion of an
aircraft and acts parallel and opposite to the relative airflow .
, 10. According to Bernoulli's principle, how does the velocity of air moving over
the curved upper surface of a wing affect local pressure?
A) Air velocity increases, causing local pressure to decrease
B) Air velocity decreases, causing local pressure to increase
C) Air velocity increases, causing local pressure to increase
D) Air velocity remains constant while pressure drops
Answer: A
Rationale: Bernoulli's principle states that as the speed of a moving fluid (or air)
increases, the pressure within that fluid decreases, creating lower pressure over the
upper camber of the airfoil .
11. What is Newton's Third Law of Motion, and how does it relate to rotor blades?
A) Objects in motion stay in motion; it explains why rotors keep spinning when
powered off
B) For every action there is an equal and opposite reaction; rotors push air down,
air pushes rotors up
C) Force equals mass times acceleration; it determines rotor thrust output
D) Energy cannot be created or destroyed; it explains battery drain
Answer: B
Rationale: Newton's Third Law states that for every action there is an equal and
opposite reaction. Rotor blades generate lift by accelerating air downward, and the
air pushes back upward on the blades .
12. The four forces acting on an RPAS are:
A) Lift, Drag, Torque and Thrust
B) Lift, Weight, Thrust and Drag
C) Torque, Weight, Thrust and Drag
D) Lift, Torque, Thrust and Drag
Answer: B
Rationale: The four forces acting on any aircraft in flight are Lift (upward), Weight
(downward), Thrust (forward), and Drag (backward). Torque is a rotational force,
not one of the four primary forces .
13. An RPAS will ascend by:
A) Increase the load on all motors simultaneously
B) Decrease the load on all motors simultaneously
C) Increase the load on the clockwise spinning motors
D) Increase the load on the counterclockwise spinning motors
Answer: A
