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EVITP Final Exam Review Actual Questions and Answers 100% Correct
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EVITP Final Exam Review Actual Questions and Answers 100% Correct
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EVITP Final Exam Review ActualQuestions and Answers 100% Correct
The different models of electric vehicles on the market today use different Lithium
based chemistry - ANSWER True
A disadvantage of a DC motor with brushes and a mechanical commutator
(switch) is that the brushes wear out and need to be replaced - ANSWER True
Most modern electric cars use three phase variable reluctance motors -
ANSWER False
Modern three phase brushless DC motors (synchronous AC motors) have strong
permanent megnets in the rotors - ANSWER True
Modern three phase induction motors have strong permanent magnets in the
rotors - ANSWER False
The stators of a modern three phase brushless DC motors and modern induction
motors are very different - ANSWER False
Modern three phase induction motors have "squirrel cage" rotors that are made
of a magnetic material (ion) and a good conductor (copper or aluminum) -
ANSWER True
Most modern gasoline/electric hybrid cars use induction motors - ANSWER
False
, Some modern plug in battery electric cars use induction motors - ANSWER
True
A modern three phase induction motor with a controller for an electric car cannot
produce torque at zero speed - ANSWER False
Mark below the equation for the force, F, in Newtons on a wire of length L meters,
running through a constant magnetic field of B Webbers/(square meter) with a
wire carrying the current, I amps - ANSWER F = BIL
Mark below the equation for the "back electromotive force (EMF)" denoted E,
generated in a wire of length L, moving at a velocity V perpendicular to a magnetic
field of constant flux density B. - ANSWER E = BLV
The torque produced by a brush-commutator DC motor having a permanent
magnet stator is proportional to the current I in the coil winding of the motor
rotor (some other types of motors have similar torque-current relationship) -
ANSWER True
Most modern electric motors used in electric vehicles need a controller
(electronics) to limit the maximum current at zero speed - ANSWER True
In an electric car, regenerative braking occurs when the electric motor controller
produces a higher voltage on the battery terminals than the open circuit voltage
of the battery - ANSWER True
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