A) The feedback circuit eliminates the need for permanent magnets. B) The feedback circuit controls the electromagnet to maintain the suspended object at the correct position. C) The feedback circuit decreases the air gap in the suspension system. D) The feedback circuit increases the energy consumption of the system.
A) Due to small time delays in the inductance of the coil and sensing the position. B) Because it eliminates the need for feedback circuitry. C) Because it requires a guiding rail for operation. D) Because it increases energy consumption significantly.
A) It eliminates the need for feedback circuitry. B) It decreases the stability of the system. C) It requires more permanent magnets than classical EMS. D) It reduces energy consumption and increases air gap.
A) The principle of electrodynamic suspension. B) The principle of electromagnetic suspension. C) The principle of mechanical suspension. D) The principle of gravitational suspension.
A) Thermal sensors. B) Mechanical displacement sensors. C) Optical position sensors. D) Inductive gap sensors.
A) Through mechanical switching. B) In a pulse-width modulation (PWM) configuration. C) By varying the coil's inductance. D) Using direct current supply.
A) Maglev is quieter and smoother due to reduced physical contact between wheels and track. B) Maglev requires less maintenance than wheeled systems. C) Maglev has higher energy consumption. D) Maglev can operate without any guiding rail.
A) It eliminates the need for electromagnetic suspension. B) It reduces the air gap in the launch system. C) It saves on design and launching costs while providing a safer launching method. D) It increases the speed of spaceship launches significantly.
A) The M-Bahn, opened in Berlin, Germany. B) The first commercial maglev train was the Birmingham Maglev, opened in Birmingham, England. C) The Shanghai Maglev Train, opened in Shanghai, China. D) The Transrapid, opened in Germany.
A) To increase the air gap in the system. B) To mediate the constant tug-of-war by offsetting bias current as the rotor deviates from its center position. C) To eliminate the need for gap sensors. D) To supply power to the electromagnets directly.
A) Gravitational suspension technology. B) Mechanical suspension technology. C) Thermal suspension technology. D) Electrodynamic suspension technology.
A) To increase air gap and reduce energy consumption. B) To require more permanent magnets. C) To eliminate the need for feedback circuitry. D) To decrease the stability of the system.
A) Guiding rails for wheeled transportation. B) Thermal insulation systems. C) Mechanical shock absorbers. D) Active magnetic bearings in rotating machinery.
A) To eliminate the need for a guiding rail. B) To sense the position of the rotor. C) To supply current to the electromagnets. D) To control the feedback circuitry directly.
A) Because they require a guiding rail. B) Because they increase noise and vibrations. C) Because they have higher energy consumption. D) Because they eliminate the need for electromagnetic suspension.
A) To eliminate the need for a controller. B) To provide feedback required to control the position of the rotor within the gap. C) To increase the air gap in the system. D) To supply power to the electromagnets.
A) They can operate without any guiding rail. B) They require less maintenance than traditional rail systems. C) They have higher energy consumption. D) They are quieter and smoother due to reduced physical contact between wheels and track.
A) They vary the coil's inductance. B) They rely on mechanical switching. C) They operate using direct current supply. D) They use solid state devices operating in a pulse-width modulation (PWM) configuration.
A) Increased energy consumption. B) The need for a guiding rail. C) Elimination of feedback circuitry. D) Small time delays in the inductance of the coil and sensing the position.
A) They eliminate the need for electromagnetic suspension. B) They save on design and launching costs while providing a safer launching method. C) They increase the speed of spaceship launches significantly. D) They reduce the air gap in the launch system.
A) Used by maglev and hyperloop experts to improve performance. B) Decreases air gap. C) Increases energy consumption. D) Eliminates the need for permanent magnets.
A) To increase energy consumption. B) To control the electromagnet and maintain the suspended object at the correct position. C) To decrease air gap. D) To eliminate the need for permanent magnets.
A) Braunbek B) Hermann Kemper C) Emile Bachelet D) Samuel Earnshaw
A) Earnshaw's Theorem B) Kemper's Principle C) Braunbek's Extension D) Bachelet's Theorem
A) Samuel Earnshaw B) Hermann Kemper C) Braunbek D) Emile Bachelet
A) Commercial maglev trains. B) Passenger transportation. C) Large scale monorail vehicles. D) Smaller mail carrying systems.
A) Hermann Kemper B) Samuel Earnshaw C) Braunbek D) Emile Bachelet
A) 1984 B) 1934 C) 1979 D) 1912 |