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Electrical And Hybrid Vehivles Mcqs, Quizzes of Mechanical Engineering

Kavayitri Bahinabai Chaudhari North Maharashtra UniversityMechanical Engineering

In this pdf we can see the Mechanical Engineering Subject (Electrical and Hybrid Vehicle) mcqs for Exam preparation.

Typology: Quizzes

2020/2021

Available from 08/03/2022

Harry9223
Harry9223 🇮🇳

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ELECTRICAL AND HYBRID VEHICLE MCQS
UNIT NO 1
1. The main sources of electricity for hybrids are
a) batteries,
b) FCs, and
c) Capacitors
d) None of these
e) All of these
Ans- e
2. The vehicle must provide power for accessories such as
a) heating fan,
b) lights,
c) power steering
d) Air conditioning.
e) All of these
Ans- d
3. Braking and idling losses are…………. in urban driving and even higher
in more congested driving
a) extremely high
b) extremely low
Ans-a
4. On the highway idling losses are…….
a) Maximum
b) Minimum
c) Doesn’t any losses
Ans-b
5. Which of the following is NOT the type of Hybrid
Vehicle? a) Plug-in Hybrid
b) Parallel Hybrid
c) Natural Gas For
Vehicles d) Series Hybrid
Ans- c
6. The Hybrid Electric Vehicle consists of:
a) Internal Combustion Engine + Electric Motor
b) Motor Electric 1 + Motor electric 2
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ELECTRICAL AND HYBRID VEHICLE MCQS

UNIT NO 1

  1. The main sources of electricity for hybrids are a) batteries, b) FCs, and c) Capacitors d) None of these e) All of these Ans- e
  2. The vehicle must provide power for accessories such as a) heating fan, b) lights, c) power steering d) Air conditioning. e) All of these Ans- d
  3. Braking and idling losses are…………. in urban driving and even higher in more congested driving a) extremely high b) extremely low Ans-a
  4. On the highway idling losses are……. a) Maximum b) Minimum c) Doesn’t any losses Ans-b
  5. Which of the following is NOT the type of Hybrid Vehicle? a) Plug-in Hybrid b) Parallel Hybrid c) Natural Gas For Vehicles d) Series Hybrid Ans- c
  6. The Hybrid Electric Vehicle consists of: a) Internal Combustion Engine + Electric Motor b) Motor Electric 1 + Motor electric 2

c) NGV engine + Gasoline engine Ans- a

  1. Select the features of Hybrid Electric Vehicles a) Idle Stop b) EV Drive c) Motor Assist d) Regenerative Braking e) All of these Ans -e
  2. The electric motor in a hybrid car can also act as : a) cooling fan b) fuel pump c) generator
  3. Regenerative braking involves : a) nanofibers that repair the surface of brake pads b) reducing the amount of friction necessary to slow a car c) reclaiming heat from the brakes and using it for power Ans- c
  4. The benefits of a hybrid car include: a) Reducing emissions b) Improving gas mileage c) High fuel consumption d) High speed driving Ans – a & b
  5. Select the cycle use in a Hybrid Engine. a) Otto b) Diesel c) Atkinson d) Isentropic Ans – c
  6. What is the grading resistance value of a vehicle when goes up or down a slope a) Mga b) MgaCos c) MgaSin d) Zero Ans C
  7. What is the grading resistance value of a vehicle when moving on flat surface? a) Mga

a) high energy but low power b) both modest power and energy c) very large power but low energy Ans B

  1. The capacitor supplies very large power but low energy. a) high energy but low power b) both modest power and energy c) very large power but low energy Ans C
  2. Golden Age of Electric Vehicle (1890-1924)
  3. Robert Anderson of Aberdeen, Scotland built the first electric vehicle
  4. According to various reports, cars and trucks are responsible for a) almost 25% of CO2 emission b) almost 22% of CO2 emission c) almost 30% of CO2 emission d) almost 35% of CO2 emission Ans A
  5. Motion and dynamic equations for vehicles design involve the basic principles of a) Newton's First law of motion b) Newton's second law of motion c) Newton's Third law of motion Ans B
  6. The vehicle motion can be completely determined by analysing the forces acting on it a) in the direction of motion b) in the Perpendicular direction of motion c) in the inclined direction of motion Ans A
  7. The tractive force (Ft) in the contact area between a) the tires of the driven wheels and the road surface propels the vehicle forward. b)
  8. When the vehicle moves, it encounters a resistive force that tries to retard its motion. The resistive forces are a) Rolling resistance b) Aerodynamic drag c) Uphill resistance d) All of these Ans D
  9. When the tire rolls a) the leading half of the contact area is loading and the trailing half is unloading b) the leading half of the contact area is unloading and the trailing half is loading

c) both the leading half and trailing half of the contact area is loading d) both the leading half and trailing half of the contact area is unloading Ans A

  1. Which vehicle has the smallest number of principle components? a) Traditional vehicle b) Hybrid vehicle c) Electric vehicle Ans C
  2. What is meant by the term regeneration? a) It’s when electricity is generated during deceleration and braking b) It’s when the battery is charged during engine idling c) It’s when the battery is recharged from the mains supply Ans A
  3. The road resistance is expressed as
  4. 1.The vehicle moves very slowly V=0, FAD and Froll are a) Higher b) Lower c) Negligible d) None of these Ans C
  5. The vehicle moves very slowly V=0, The vehicle accelerating is a) Higher b) Lower c) Zero d) None of these Ans C
  6. The vehicle moves very slowly V=0, FTR is a) Maximum b) Minimum c) Zero d) None of these Ans A UNIT-
  7. In which hybrid system bi- direction power flow of the electric motor in

a) Gear box b) Motor Generator c) Automatic Transmission d) Engine Ans – b

  1. An automotive drive train consists of: a) a power plant b) a clutch c) a gear box d) Differential shaft e) All of These Ans D
  2. By what name are traditionally powered vehicles, equipped with a start-stop system, sometimes also known? a) Hybrid b) Hybrid- active c) Micro- hybrid Ans c
  3. This the functional block diagrams of a) Series configuration b) Parallel configuration c) Series-parallel configuration d) Complex configuration Ans A
    1. The total energy output from the dynamic powertrain will be …….in the whole driving cycle a) Maximum b) Minimum c) Zero d) None of these Ans C
  1. Which Hybrid system converted twice (mechanical to electrical and then to mechanical) a) Series Hybrid System b) Parallel Hybrid System c) Series-Parallel Hybrid System d) Complex Hybrid System Ans A
  2. The series hybrid drivetrain is used in heavy commercial vehicles, military vehicles and buses
  3. In Which HEV System allows both ICE and electric motor (EM) to deliver power to drive the wheels. a) Series Hybrid System b) Parallel Hybrid System c) Series-Parallel Hybrid System d) Complex Hybrid System Ans B
  4. Which of the following configuration needs an additional electric machine and a planetary gear a) Series Hybrid System b) Parallel Hybrid System c) Series-Parallel Hybrid System d) Complex Hybrid System Ans C
  5. During braking or deceleration the electric motor acts as a) A Generator b) A Power converter c) A Mech. coupler d) A Battery Ans A
  6. Transmission including a) brakes, clutches and gears b) brakes, clutches c) clutches and gears d) gear and brakes
  7. How many operating modes of ICE dominated system are: a) 4 b) 5 c) 6 d) 3

a) In-wheel drive. b) Out-whet drive Ans A UNIT – 3

  1. How can you identify a high-voltage cable? a) They are coloured red b) They have the wording “high-voltage” etched into their insulation c) They are coloured orange Ans C

  2. What makes the risk of an electric shock from a high-voltage battery possibly more dangerous than that from an AC circuit? a) The higher voltage b) The lower amperage c) The greater available amperage Ans C

  3. What voltage is likely to be available from the battery of an electric vehicle or hybrid? a) 12V b) 24V c) 300V Ans C The voltage likely between 100 to 400 V

    1. A battery consists of two or more electric cells joined together. The cells convert chemical energy to a) Electrical energy b) Mechanical energy c) Electrostatic energy d) Kinetic energy Ans A
    2. The cells consist of positive and negative electrodes joined by a) an electrolyte b) an anode c) a cathode Ans A
    3. The Chemical reaction between the electrodes and the electrolyte which generates a) DC electricity b) AC electricity c) Both AC and DC electricity

Ans A

  1. The energy stored in a battery depends on a) its voltage b) the charge stored c) its voltage, and the charge stored d) None of these Ans C
  2. Internal resistance of a lead acid battery is
  3. Level of electrolyte in a cell should be ________ the level of plates a) Below b) Equal to c) Above d) None of thses Ans C
  4. When two batteries are connected in parallel, it should be ensured that a) They have same e.m.f. b) They have same make c) They have same ampere-hour capacity d) They have identical internal resistance Ans A
  5. In a lead-acid cell dilute sulphuric acid (electrolyte) approximately comprises the following a) One part H 2 O, three parts H 2 SO 4 b) Two parts H 2 O, two parts H 2 SO 4 c) hree parts H 2 O, one part H 2 SO 4 d) All H 2 SO 4 Ans C
  6. The capacity of a lead-acid cell is measured in a) Amperes b) Ampere-hours c) Watts d) Watt-hours Ans B
  7. In constant voltage charging method, the charging current from discharged to fully charged condition. a) Decreases b) Increases c) Remains constant d) None of the above Ans A
  8. During the charging of a lead-acid cell a) Its voltage increases b) It gives out energy
  1. A fuel cells converts .........energy into electrical energy a) Mechanical b) Magnetic c) Solar d) Chemical Ans D
  2. Lithium-polymer batteries use a a) solid electrolyte b) liquid electrolyte c) solid and liquid electrolyte d) none of these Ans A
  3. Batteries that cannot be recharged and are designed for a single discharge are known as a) primary batteries b) Secondary batteries Ans A
  4. lead-acid type of battery heavy use in industrial EVs, such as for golf carts in sports, passenger cars in airports, and forklifts in storage facilities and supermarkets
  5. As discharge proceeds, the internal resistance of the cell rises due to PbSO formation and decreases the electrolyte conductivity as H2SO4 is consumed.
  6. The PM machines are fed by a) DC-AC converter b) DC-DC converter c) AC-AC converter Ans A
  7. The electrochemically active ingredient of the positive or negative electrode is called the active material
  8. The connection points between the electrodes and the external circuit are called the battery terminals
  9. The electrons are released at the negative electrode during discharge operation
  10. The practical cell voltage is 1.2 to 1.3 V
  11. Electric motors can be a) DC type b) AC type c) DC type or AC type Ans C
  12. The control of Induction motors is a) more complex than DC motors b) Less complex than DC motors

Ans A

  1. The buck converter is a) step down converter b) step up converter Ans A
  2. The duty cycle is a) T 1 /T b) T 2 /T c) T/T 1 d) T/T 2 Here T is cycle time during 1 time period Ans A
  3. In 120 0 conduction mode of DC-AC inverter, each switch conducts for 60 0
  4. A two phase PM machine with windings and magnets on the rotor is a) The windings are displaced by 60 electrical degrees b) The windings are displaced by 90 electrical degrees c) The windings are displaced by 120 electrical degrees Ans B
  5. In Three Phase to Two Phase Transformation each of the three phase windings has N number of turns per phase, and equal current magnitudes, the two phase windings will have 3/2 N turns per phase for mmf equality
  6. In EV the main source of electrical power is a) Battery b) ICE c) Both d) None of these Ans A
  7. The Buck Converter with R Load and Filter The output voltage and current of the converter contain harmonics due to the switching action. In order to remove the harmonics LC filters are used.
  8. The boost converter is a) step down converter b) step up converter Ans B
  9. In DC-DC converters, Unidirectional converters are used to supply power to various onboard loads such as a) sensors, b) controls, c) entertainment and d) safety equipments
  1. Bidirectional DC-DC converters are used where regenerative braking is required
  2. DC converters depending on the directions of current and voltage flows. DC converters can be classified into five types
    1. First quadrant converter
    2. Second quadrant converter First and second quadrant converter Third and fourth quadrant converter Four quadrant converter
  3. The first and second quadrant converters are unidirectional where as the first and second, third and fourth and four quadrant converters are bidirectional converters.
  1. In Second Quadrant Converter, The load voltage is …….but the load current is ……. a) Positive, Negative b) Negative, Positive c) Positive, Positive d) Negative, Negative Ans A
  2. In Two Quadrant Converters, The input voltage is greater than the load voltage
  3. When a vehicle is rounding a curved road, the outer wheel needs to travel on a a) larger radius than the inner wheel b) Smaller radius than the inner wheel c) Equal radius to the inner wheel Ans A

c) Both d) None of these

  1. If the number of poles producing the stator magnetic field is not equal to the number of rotor poles producing the rotor magnetic field, then the net torque produced by the motor will be a) Greater than zero b) Equal to zero c) Less than zero d) All of these UNIT – 4
  2. Peukert’s equation is a widely accepted empirical relation among capacity (Q), discharge current (I), and time (t) or among specific power (SP), specific energy (SE), and time (t). Peukert’s equation is used in developing a fractional depletiont model (FDM) of batteries. The FDM of a battery can be used to predict the range of an EV. The FDM can be developed using the constant current discharge approach or the power density approach associated with the two forms of Peukert’s equation.
  3. The I vs. tcut data are used to fit Peukert’s equation with constant current: Where I is the constant discharge current; and, and n are curve-fitting constants, with n 1 for small currents and n 2 for large currents.
  4. What should be done when working on a vehicle in the workshop? a) Remove all petrol or diesel powered vehicles from the workshop. b) Cordon off the area surrounding the vehicle with barriers and clearly visible warning notices. c) Keep any remote or smart keys locked away at a safe distance.
  5. Mild and full hybrids 0% < H < 50%
  6. Plug-in hybrids 50% < H < 100%
  1. The performance of EM is measured by following quantities: a) Torque and Power Capability b) Constant Power Speed Ratio (CPSR) c) Both d) None of these Ans C
    1. Continuous rating: The EM can be operated when its continuous rated region.
    2. Intermittent overload operation: The EM can operate in this regime for short duration (typically <30s).
    3. Peak overload operation: The EM can operate in this region for a very short duration (typically <1~2s).

Constant Power Speed Ratio (CPSR)

  1. In the 1st quadrant the EM works as a motor and its direction of rotation is clockwise (CW).
  2. In the 2nd quadrant, the EM operates as a generator and its direction of counter clockwise (CCW)
  3. In 3rd quadrant the EM operates as motor and its direction of rotation is CCW
  4. In the 4th quadrant the EM operates as a generator and its direction of rotation is CW UNIT – 5
    1. The basis for control is the feedback loop. The input is the desired behavior of the system and it is compared with the actual behavior to determine a) The error signal.
    2. Full Form of ECU(Electronic Control Unit)
    3. he Hybrid ECU is in command of all other ECUs
    4. ICE ECU: This controls the various ICE parameter
    5. The EM ECU is responsible for switching of the EM from motoring mode to the generator mode and also controls the motor to deliver the torque demanded by the hybrid ECU.
    6. Transmission ECU: the transmission ECU provides the correct gear ratio to control the torques and angular speeds of the EM and the ICE.
    7. Battery ECU or Battery Management System
    8. The BMS avoids the stress of heat and over-temperature