Thunderstorms are extremely dangerous for aircraft as they can generate severe turbulence and sudden changes in wind speed and direction known as wind shear. These conditions can make it very difficult for pilots to control the aircraft and maintain a safe flight path. Question: What is a major hazard that thunderstorms pose to aircraft?
正确答案:B
2
听力原文
Pilots use the onboard weather radar to detect the location and intensity of thunderstorms. This allows them to plan a route that avoids the storm cells and reduces the risk of flying through hazardous weather. Question: How do pilots usually detect the presence of a thunderstorm?
正确答案:C
3
听力原文
When a thunderstorm is approaching, airports often temporarily suspend all flight operations. This is to ensure the safety of the aircraft on the ground and in the air, as thunderstorms can bring strong winds, heavy rain, and lightning that can damage the airport infrastructure and endanger the planes. Question: What might an airport do when a thunderstorm is approaching?
正确答案:B
4
听力原文
Lightning associated with thunderstorms can pose a serious threat to aircraft as it can cause damage to the aircraft's electrical systems. The high voltage discharge can disrupt avionics, navigation equipment, and even cause structural damage in severe cases. Question: What is the risk of flying near a thunderstorm's lightning?
正确答案:B
5
听力原文
Thunderstorms disrupt air traffic flow. Flights have to be delayed, rerouted, or held in a holding pattern to avoid flying through the storm. Air traffic control has to carefully manage the situation to ensure the safety and efficient movement of all aircraft in the airspace. Question: How does a thunderstorm affect the air traffic flow?
正确答案:B
6
听力原文
Pilots are recommended to deviate around the thunderstorm by a significant margin. Flying through or too close to a thunderstorm is extremely hazardous, so they use their radar and flight planning tools to find a safe route around the storm cells. Question: What is a recommended strategy for pilots to avoid a thunderstorm?
正确答案:C
7
听力原文
Thunderstorms often produce heavy rain and hail. The heavy rain can reduce visibility on the runway and the hail can damage the runway surface and the aircraft, making landing and takeoff more challenging. Question: What type of precipitation is commonly associated with thunderstorms and can affect runway conditions?
正确答案:B
8
听力原文
Thunderstorms can cause erratic altimeter readings due to rapid pressure changes. The sudden changes in air pressure within the storm can lead to inaccurate altitude indications, which can be a problem for pilots trying to maintain a proper flight level. Question: How do thunderstorms impact the altimeter readings of an aircraft?
正确答案:B
9
听力原文
Air traffic control plays a crucial role during thunderstorm activity. They provide pilots with real-time weather updates about the thunderstorm's location, intensity, and movement. They also issue rerouting instructions to help pilots avoid the storm and maintain a safe and orderly flow of air traffic. Question: What is the role of air traffic control in guiding aircraft during thunderstorm activity?
正确答案:B
10
听力原文
Flight attendants should secure all loose items and make sure passengers are seated with seatbelts fastened when the flight is near a thunderstorm. This is to prevent injuries in case of turbulence or sudden movements of the aircraft caused by the storm. Question: What should flight attendants do during a flight near a thunderstorm?
正确答案:B
11
听力原文
The hydraulic system in an aircraft is essential as it powers the movement of flight control surfaces like the ailerons, elevators, and rudder. Without a properly functioning hydraulic system, the pilot would have difficulty controlling the aircraft's pitch, roll, and yaw. Question: What is the main function of an aircraft's hydraulic system?
正确答案:B
12
听力原文
If the pilots notice a slow response when they try to move the flight controls, it could be a sign of a hydraulic system issue. The hydraulic fluid might be low, there could be a leak, or a component within the system might be malfunctioning. Question: What might indicate a problem with the hydraulic system?
正确答案:B
13
听力原文
When a pilot suspects a hydraulic leak, it is crucial to land at the nearest suitable airport as soon as possible. A hydraulic leak can lead to a loss of control of the flight control surfaces, endangering the safety of the flight. Question: What should the pilot do if there is a suspected hydraulic leak?
正确答案:B
14
听力原文
The hydraulic pressure is monitored in the cockpit by a pressure gauge. Pilots regularly check this gauge to ensure that the hydraulic system is operating within the normal pressure range. If the pressure drops below the acceptable level, it indicates a potential problem. Question: How is the hydraulic pressure monitored in the cockpit?
正确答案:B
15
听力原文
Contamination of the hydraulic fluid is a common cause of hydraulic system failure. Dust, dirt, or metal particles can get into the fluid and damage the pumps, valves, and other components of the hydraulic system. Question: What is a common cause of hydraulic system failure?
正确答案:B
16
听力原文
Some aircraft have a manual override system as a backup in case of a primary hydraulic system failure. This allows the pilot to manually control certain flight control surfaces, although it requires more physical effort and may have limited functionality compared to the hydraulic system. Question: What backup systems might an aircraft have in case of a primary hydraulic system failure?
正确答案:B
17
听力原文
The hydraulic fluid is usually checked and replaced after a certain number of flight hours, typically around every 100 flight hours. Regular maintenance helps to ensure the proper functioning of the hydraulic system and prevent issues caused by degraded fluid. Question: How often is the hydraulic fluid typically checked and replaced?
正确答案:B
18
听力原文
If the hydraulic system completely fails and there is no backup, the flight controls may freeze in the position they were in at the time of failure. This can make it very difficult or impossible for the pilot to control the aircraft's flight path. Question: What happens to the flight controls if the hydraulic system completely fails and there is no backup?
正确答案:A
19
听力原文
The hydraulic pump is responsible for pressurizing the hydraulic fluid and circulating it throughout the hydraulic system. It provides the force needed to move the flight control surfaces and other hydraulic-powered components. Question: What is the role of the hydraulic pump in the system?
正确答案:B
20
听力原文
Cold weather can make the hydraulic fluid more viscous. This thicker fluid can slow down the operation of the hydraulic system and affect the response of the flight controls. Special precautions may need to be taken in cold weather to ensure the proper functioning of the hydraulic system. Question: How does cold weather affect the hydraulic system?