Electric Vehicle Nanodegree EXAM – ASDC

An EV battery charger works on ________ and _______ modes of charging.

AC001 charger has a single phase 230V input.

In which of the following drive modes is air drag relatively insignificant?

If the velocity of a vehicle is tripled, what happens to the air drag force?

A 34 kWh battery is charged at SoC of 64%. What is energy it contains.

Li-Ion cells offer higher resistance at higher temperatures

The growth of dendrites is one of the reasons responsible for internal short circuits that occur in Li-Ion batteries.

Ni content in NMC811 is lower than in NMC111.

21700 Cylindrical cells have diameter of 70mm and height of 21mm.

Cell level protection features such as PTC and CID are present in cylindrical cells but not in prismatic cells.

SoC of a Li-Ion Batteries a linear function of voltage

Once one reaches the peak voltage of a cell (say 4.2V), the battery can not be charged further.

A vehicle needs to run continuously at 60 kmph and should have a peak torque of 150 Nm. A motor gives peak torque of 25 NM at 3000 rpm. What should be the gear ratio for the motor to be used by the vehicle?

A 34 kWh battery is charged at SoC of 64%. What is energy it contains.

A 34 kWh capacity battery is voltage 350V. What is its capacity in Ah

Maximum Usable Capacity of a battery mainly depends on three parameters. Which are these three parameters?

Specific Energy of Li-Sulphur batteries is higher than Li Air batteries

Lower the energy density safer is the battery chemistry.

Recent research on NMC Li Ion chemistries focus on increasing the cobalt content

Prismatic Li Ion cells come in standard shape and size.

What is the charging time required using On board slow charger operating at 230 v AC and 15 A for an electric vehicle with a 24-kWh battery specification?

A Battery when charged at 3C vis-a-vis 1C, the cells reach peak voltage at lower SoC.

A 3.65V, 15Ah (rated capacity) li Ion cell, with 88% SoH is charged fully (0 to 100% SoC) and is being used to power a load demanding continuous current of 1C. How long (time in minutes) can the cell power the load.

Need a 15 kWh battery with nominal voltage at 350V. The cells that one has is 3.65V, 14 Ah Li Ion cells. What will be the best configuration for the battery?

Packs made with cylindrical cells need right pressure to be applied on cells to avoid bulging.

SoH of a battery pack is the SoH of the strongest cell in the pack.

In a module of 4 parallel cells of 3.65V, 4Ah each, one cell fails in open. The resultant capacity of module is then reduced to 12Ah.

Terminal Voltage is a measure of SoC of battery while charging.

To stop swelling, retention plates are required in:a) Cylindrical Cell b) Prismatic cell c) Pouch cell

At 1C rate of charging in CCCV mode Li Ion Battery gets fully charged to 100% in 1 hour.

The position of piston when it is nearest to crankshaft is known as ________ dead center.

The nominal volume of the combustion chamber when the piston is at TDC is called as _______ volume.

The ratio of brake power to indicated power is called as ______ efficiency

The set of components from the prime mover output to the wheels is called as _____

The force that acts on the vehicle due to hysteresis of the tyre is ______.

Compared with Pure Electric vehicle, an electric vehicle with range extender has _____

If the maximum speed of the motor is doubled and its base speed is halved, then its speed ratio is ______.

A higher tire aspect ratio results in_____

In CATIA,Is It Possible to directly enter in to Sketcher Workbench?

In CATIA, How many types of Co-ordinate systems are there?

In CATIA, What is the file save extension of surface?

In Ansys work bench material properties can be added in

Is it possible to use Same Engineering data for different analysis in the same Project file in ANSYS?

In which type of assembly method, the parts are created first and then imported

Which feature is used to convert the surface geometry to solid geometry in Solidworks?

The results like deformation ,von-mises stresses etc are comes under

Which of the following statements about stress is/are true?

What differentiates a transient thermal analysis from a steady state one?

The motor speed is ______ than wheel speed

The wheel torque is ______ than motor torque

______ are used where battery charging and regenerative braking is required

_______produces lower output voltage than input voltage

Wheel base means________ with respect to automobiles

Gradient resistance for a vehicle depends on which of the following factors?

The torque available at the contact between road and driving wheel is called _________

If the velocity of a vehicle is tripled, what happens to the air drag force?

In a 7P80S battery pack built using Parallel cell modules, how many cells are there in each module?

Which is the material used as anode in a lithium ion battery?

Which is the material used as a cathode in a lithium-ion battery?

________scheme by NITI Ayog incentivizes EV ownership by subsidizing upfront cost of purchase combined with GST rates slashed.

OCPP Stands for_____

A busbar is designed for the battery pack current of 42Ah. The length of busbar is 30mm. Calculate the thickness of the busbar if current density is 5A/mm2 considering the charge rate of 0.5C and discharge rate of 1C.

There is a 20 kW charger with output voltage that can be varied from 48V to 800V. a) There is a vehicle with 80 kWh battery voltage at 325V. What would be the peak charging current and C-rate?

AC-001 is DHI specified bharat charger for DC charger.

Cha-de-mo is a Japanese charging standard whereas CCS was developed in Europe.

AC chargers need on board chargers for AC-DC conversion.

Output voltage in CHAdeMO is upto ___ V DC.

What impact will a low-pass software filter – applied to the throttle signal – have on the vehicle behaviour?