Helicopter Operations MCQs

What is the primary function of the collective pitch control in a helicopter? a) To control the yaw of the helicopter b) To adjust the rotor blade pitch and affect lift c) To control the helicopter’s speed d) To regulate fuel flow Answer: b) To adjust the rotor blade pitch and affect lift Which control is used to adjust the helicopter’s forward and backward movement? a) Collective pitch control b) Cyclic pitch control c) Tail rotor control d) Throttle Answer: b) Cyclic pitch control In a helicopter, what is the purpose of the tail rotor? a) To provide thrust b) To control yaw and counteract torque c) To increase lift d) To adjust altitude Answer: b) To control yaw and counteract torque What is the effect of increasing the collective pitch on a helicopter’s rotor blades? a) It increases lift and causes the helicopter to climb b) It decreases lift and causes the helicopter to descend c) It causes the helicopter to move sideways d) It has no effect on the helicopter’s lift Answer: a) It increases lift and causes the helicopter to climb What does the term “hover” mean in helicopter operations? a) To maintain a fixed altitude and position b) To move forward at a constant speed c) To rotate around the vertical axis d) To descend rapidly Answer: a) To maintain a fixed altitude and position Which component of a helicopter provides the primary lift force? a) Tail rotor b) Main rotor c) Stabilizer bar d) Landing gear Answer: b) Main rotor What is the function of the cyclic control in a helicopter? a) To control the pitch of the rotor blades and change the direction of flight b) To adjust the altitude by changing rotor blade pitch c) To regulate the fuel flow to the engine d) To control the helicopter’s yaw Answer: a) To control the pitch of the rotor blades and change the direction of flight Which of the following is a typical helicopter operation mode used for takeoff and landing? a) Forward flight b) Autorotation c) Hover d) Cruise Answer: c) Hover What is the purpose of the governor in a helicopter engine? a) To maintain constant rotor RPM b) To control the helicopter’s altitude c) To adjust the pitch of the rotor blades d) To manage fuel consumption Answer: a) To maintain constant rotor RPM What does “autorotation” refer to in helicopter flight? a) The process of rotating the helicopter’s main rotor blades without engine power b) The automatic adjustment of blade pitch c) The helicopter’s ability to perform aerobatic maneuvers d) The process of starting the helicopter’s engine Answer: a) The process of rotating the helicopter’s main rotor blades without engine power Which instrument provides information about the helicopter’s altitude? a) Airspeed indicator b) Altimeter c) Vertical speed indicator d) Heading indicator Answer: b) Altimeter What is the main purpose of a helicopter’s stabilizer bar? a) To reduce rotor blade vibration and enhance stability b) To control the helicopter’s yaw c) To increase rotor blade pitch d) To provide additional lift Answer: a) To reduce rotor blade vibration and enhance stability In helicopter operations, what does the term “translational lift” refer to? a) The increase in lift as the helicopter moves forward due to a more efficient airflow b) The lift generated during hover c) The lift created by the tail rotor d) The lift produced when ascending vertically Answer: a) The increase in lift as the helicopter moves forward due to a more efficient airflow What is the effect of increasing the throttle in a helicopter? a) It increases engine power and rotor RPM b) It decreases rotor RPM c) It adjusts the pitch of the rotor blades d) It controls the helicopter’s yaw Answer: a) It increases engine power and rotor RPM What is “ground effect” in helicopter operations? a) The phenomenon where the helicopter experiences increased lift close to the ground due to reduced airflow turbulence b) The effect of wind on the helicopter’s flight path c) The impact of engine temperature on performance d) The influence of the helicopter’s weight on its maneuverability Answer: a) The phenomenon where the helicopter experiences increased lift close to the ground due to reduced airflow turbulence Which control input is primarily responsible for changing the helicopter’s direction of flight? a) Collective pitch b) Cyclic pitch c) Throttle d) Tail rotor control Answer: b) Cyclic pitch In helicopter flight, what does the term “hovering” imply about the helicopter’s position? a) The helicopter is stationary relative to the ground b) The helicopter is moving forward at a constant speed c) The helicopter is descending rapidly d) The helicopter is rotating around its vertical axis Answer: a) The helicopter is stationary relative to the ground What is the primary purpose of a helicopter’s rotor blade pitch control? a) To adjust the angle of attack of the blades to control lift and thrust b) To control the helicopter’s speed c) To regulate engine RPM d) To manage the fuel mixture Answer: a) To adjust the angle of attack of the blades to control lift and thrust Which type of helicopter rotor system uses a single main rotor with a tail rotor to counteract torque? a) Tandem rotor system b) Coaxial rotor system c) Single rotor system d) Intermeshing rotor system Answer: c) Single rotor system In helicopter operations, what is meant by the term “yaw”? a) The rotation of the helicopter around its vertical axis b) The movement of the helicopter up and down c) The forward and backward movement of the helicopter d) The tilt of the rotor blades Answer: a) The rotation of the helicopter around its vertical axis What is the purpose of the “anti-torque” system in a helicopter? a) To counteract the rotational force (torque) produced by the main rotor b) To increase the helicopter’s speed c) To adjust the helicopter’s altitude d) To stabilize the helicopter in hover Answer: a) To counteract the rotational force (torque) produced by the main rotor Which type of helicopter rotor system features two rotors mounted one above the other on the same axis? a) Tandem rotor system b) Coaxial rotor system c) Single rotor system d) Intermeshing rotor system Answer: b) Coaxial rotor system What is the primary advantage of a tandem rotor helicopter configuration? a) Enhanced lifting capacity and stability b) Increased fuel efficiency c) Reduced noise levels d) Greater maneuverability Answer: a) Enhanced lifting capacity and stability Which instrument in a helicopter provides information about the rate of climb or descent? a) Altimeter b) Vertical speed indicator c) Airspeed indicator d) Attitude indicator Answer: b) Vertical speed indicator What is the function of the “flybar” in a helicopter rotor system? a) To stabilize the rotor blades and reduce vibrations b) To increase rotor blade pitch c) To control the helicopter’s speed d) To manage the tail rotor’s thrust Answer: a) To stabilize the rotor blades and reduce vibrations What does the term “settling with power” refer to in helicopter operations? a) The condition where the helicopter descends with power applied and experiences a loss of lift b) The process of adjusting the helicopter’s altitude c) The maneuver used to increase forward speed d) The adjustment of rotor blade pitch during hover Answer: a) The condition where the helicopter descends with power applied and experiences a loss of lift What does the term “translational lift” describe in the context of helicopter flight? a) The increase in lift achieved as the helicopter transitions from hover to forward flight b) The lift generated during hover c) The lift produced by the tail rotor d) The lift created when climbing vertically Answer: a) The increase in lift achieved as the helicopter transitions from hover to forward flight What is the purpose of the “cyclic pitch” control in a helicopter? a) To change the pitch angle of the rotor blades cyclically to control the direction of flight b) To adjust the rotor blade pitch uniformly c) To manage engine power output d) To control the helicopter’s yaw Answer: a) To change the pitch angle of the rotor blades cyclically to control the direction of flight Which control input is used to adjust the helicopter’s rate of climb or descent? a) Collective pitch b) Cyclic pitch c) Throttle d) Tail rotor control Answer: a) Collective pitch What does “airflow” through the rotor blades affect in helicopter operations? a) The efficiency of lift generation b) The helicopter’s yaw c) The rate of fuel consumption d) The helicopter’s stability Answer: a) The efficiency of lift generation In helicopter operations, what does the term “hover taxi” refer to? a) The movement of the helicopter while hovering close to the ground b) The process of transitioning from hover to forward flight c) The procedure for landing in a confined area d) The act of hovering to perform maintenance checks Answer: a) The movement of the helicopter while hovering close to the ground What is the main purpose of a helicopter’s “transmission” system? a) To transfer power from the engine to the rotor blades b) To manage the helicopter’s yaw c) To control the altitude d) To adjust the rotor blade pitch Answer: a) To transfer power from the engine to the rotor blades What is the effect of high-density altitude on helicopter performance? a) Reduced engine and rotor performance due to lower air density b) Increased lift and efficiency c) Enhanced maneuverability d) Improved fuel efficiency Answer: a) Reduced engine and rotor performance due to lower air density What is the primary purpose of the “hover check” during pre-flight procedures? a) To ensure the helicopter can maintain a stable hover b) To verify the helicopter’s speed and heading c) To test the engine’s maximum power output d) To check the tail rotor’s performance Answer: a) To ensure the helicopter can maintain a stable hover Which control system helps in reducing rotor blade flapping and provides stability? a) Stabilizer bar b) Anti-torque system c) Governor d) Collective pitch Answer: a) Stabilizer bar What is the primary effect of a helicopter’s “dynamic rollover” condition? a) The helicopter tips over on its side due to uneven lift or surface conditions b) The helicopter increases its forward speed rapidly c) The helicopter loses altitude quickly d) The helicopter’s rotor blades experience excessive vibration Answer: a) The helicopter tips over on its side due to uneven lift or surface conditions In a helicopter, what is the purpose of the “anti-torque” pedals? a) To control the helicopter’s yaw by adjusting the tail rotor’s thrust b) To increase lift during hover c) To regulate engine RPM d) To manage the rotor blade pitch Answer: a) To control the helicopter’s yaw by adjusting the tail rotor’s thrust What does the term “angle of attack” refer to in helicopter rotor blades? a) The angle between the rotor blade chord line and the oncoming airflow b) The angle of the rotor blade relative to the ground c) The angle between the helicopter’s longitudinal axis and its direction of flight d) The angle of the tail rotor relative to the main rotor Answer: a) The angle between the rotor blade chord line and the oncoming airflow Which instrument in a helicopter indicates the rotational speed of the main rotor blades? a) Tachometer b) Altimeter c) Vertical speed indicator d) Airspeed indicator Answer: a) Tachometer What is the primary purpose of a helicopter’s “main rotor” system? a) To provide lift and thrust b) To control yaw c) To regulate fuel flow d) To manage the engine’s power output Answer: a) To provide lift and thrust In helicopter flight, what does “forward cyclic” input do? a) It causes the helicopter to pitch forward and move in the direction of the cyclic input b) It increases altitude by adjusting blade pitch c) It adjusts the tail rotor thrust to change yaw d) It decreases the helicopter’s speed Answer: a) It causes the helicopter to pitch forward and move in the direction of the cyclic input What is the main advantage of the coaxial rotor system? a) It eliminates the need for a tail rotor by counteracting torque with two rotors b) It increases the helicopter’s speed c) It provides greater lift capacity d) It improves hover efficiency Answer: a) It eliminates the need for a tail rotor by counteracting torque with two rotors What is the purpose of the helicopter’s “engine governor”? a) To maintain a constant RPM of the engine and rotor blades b) To adjust the helicopter’s altitude c) To control the cyclic pitch d) To manage the tail rotor thrust Answer: a) To maintain a constant RPM of the engine and rotor blades Which maneuver involves using the helicopter’s power to maintain a controlled descent while minimizing altitude loss? a) Autorotation b) Hover taxi c) Forward flight d) Climb Answer: a) Autorotation What does the term “vortex ring state” describe in helicopter flight? a) A condition where the helicopter descends rapidly while experiencing turbulent airflow due to rotor downwash b) The phenomenon of increased lift during hover c) The stable flight condition with constant rotor RPM d) The controlled descent in autorotation Answer: a) A condition where the helicopter descends rapidly while experiencing turbulent airflow due to rotor downwash In helicopter operations, what does “translational lift” contribute to? a) Increased efficiency and lift as the helicopter transitions from hover to forward flight b) Enhanced stability during hover c) Improved fuel consumption d) Greater maneuverability in tight spaces Answer: a) Increased efficiency and lift as the helicopter transitions from hover to forward flight What is the purpose of the “collective” pitch control in a helicopter? a) To adjust the pitch angle of all rotor blades simultaneously to control lift b) To change the helicopter’s direction of flight c) To control the throttle and engine power d) To manage the tail rotor thrust Answer: a) To adjust the pitch angle of all rotor blades simultaneously to control lift Which condition is characterized by the helicopter being in a stable hovering position with no forward movement? a) Static hover b) Forward flight c) Climb d) Descent Answer: a) Static hover What effect does “ground resonance” have on a helicopter’s flight? a) It causes excessive vibrations and potential structural damage due to rotor imbalance on the ground b) It improves the helicopter’s hover efficiency c) It increases the helicopter’s forward speed d) It enhances the stability during flight Answer: a) It causes excessive vibrations and potential structural damage due to rotor imbalance on the ground What is the main function of the helicopter’s “tail rotor” system? a) To counteract the torque produced by the main rotor and control yaw b) To provide additional lift c) To adjust the engine’s RPM d) To manage the helicopter’s forward speed Answer: a) To counteract the torque produced by the main rotor and control yaw