Regenerative Braking MCQs : This section focuses on the "Regenerative Braking" in Electric Drives. These Multiple Choice Questions (MCQ) should be practiced to improve the Electric Drives skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
___________ is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed.
A. Countercurrent Braking
B. Dynamic braking
C. Regenerative braking
D. None of the above
View Answer
Ans : C
Explanation: Regenerative braking is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed
Question 2
The most common form of regenerative brake involves an electric motor functioning as an electric generator
A. TRUE
B. FALSE
C. Can be true or false
D. can not say
View Answer
Ans : A
Explanation: True, The most common form of regenerative brake involves an electric motor functioning as an electric generator.
Question 3
The regenerative braking effect drops off at _______ speeds
A. higher
B. lower
C. normal
D. None of the above
View Answer
Ans : B
Explanation: The regenerative braking effect drops off at lower speeds, and cannot bring a vehicle to a complete halt reasonably quickly with current technology
Question 4
KERS stands for?
A. Krieger energy recovery systems
B. Krieger electric recovery systems
C. Kinetic energy recovery systems
D. Kinetic electric recovery systems
View Answer
Ans : C
Explanation: Kinetic energy recovery systems (KERS) were used for the motor sport Formula One's 2009 season, and are under development for road vehicles
Question 5
Source transformation is not valid for ___________
A. Ideal voltage source
B. Practical voltage source
C. Practical current source
D. Ideal current and voltage source
View Answer
Ans : D
Explanation: Source transformation is not valid for an ideal current and voltage source. The internal resistance for ideal voltage and current source is zero due to which source transformation is not valid
Question 6
The dead network does not have any _________
A. Dependent source
B. Resistor
C. Capacitor
D. Independent source
View Answer
Ans : D
Explanation: In the case of the dead network there are no independent sources available in the electrical circuit. The Thevenin voltage of the circuit is zero because no force is available to drive the current in the circuit
Question 7
All circuits are always _________
A. Resistors
B. Networks
C. Capacitors
D. Inductors
View Answer
Ans : B
Explanation: The network is defined as the interconnection of electrical elements that may or may not has a closed path. The circuit is defined as the interconnection of an element that must have at least one closed path. All circuits are always networks but vice-versa is not true.
Question 8
Regenerative braking is not possible in a series motor
A. TRUE
B. FALSE
C. Can be true or false
D. can not say
View Answer
Ans : A
Explanation: In regenerative braking, the motor acts as a generator. The back emf is more than the terminal voltage in case of regenerative braking.
Question 9
Current regenerative brakes immobilize a stationary vehicle
A. TRUE
B. FALSE
C. Can be true or false
D. can not say
View Answer
Ans : B
Explanation: True, Current regenerative brakes do not immobilize a stationary vehicle; physical locking is required, for example to prevent vehicles from rolling down hills.
Question 10
The regenerative braking effect available is limited
A. TRUE
B. FALSE
C. Can be true or false
D. can not say
View Answer
Ans : A
Explanation: The regenerative braking effect available is limited, and mechanical braking is still necessary for substantial speed reductions, to bring a vehicle to a stop, or to hold a vehicle at a standstill.