Chapter 6

Question 1

1. Which of the following best describes what a fuel cell outputs when it is operated?
   A. Drive train torque
   B. Electricity
   C. Hydrogen
   D. Oxygen

Answer 1

B Electricity

Question 2

2. Which of the following is required for a fuel cell to produce electricity?
   A. Nitrogen only
   B. Hydrogen and oxygen
   C. Hydrogen only
   D. Water

Answer 2

B hydrogen and oxygen

Question 3

3. What results from the electrochemical reaction in a fuel cell?
   A. Electricity only
   B. Water only
   C. Hydrogen, oxygen, and heat
   D. Electricity, water, and heat

Answer 3

D electricity water and heat

Question 4

4. Which type of fuel cell is currently being used by automobile and commercial FCEVs?
   A. Proton exchange membrane (PEM)
   B. Alkaline
   C. Solid oxide
   D. Phosphoric acid

Answer 4

A proton exchange membrane

Question 5

5. What is the maximum thermal efficiency achievable in a hydrogen fuel cell module when cogeneration is used?
   A. 100%
   B. 90%
   C. 60%
   D. 45%

Answer 5

B 90%

Question 6

n an FCEV, where is the electricity produced by the electrochemical reaction first directed?
A. Traction motor(s)
B. HVAC unit
C. Inverter
D. EESS

Answer 6

D EESS

Question 7

7. Which of the following H2 categories comes closest to being zero emissions in production?
   A. Gray
   B. Blue
   C. Green
   D. Pink

Answer 7

C green

Question 8

8. Technician A says that all current FCEVs must store liquid hydrogen on-board in high-pressure fuel cylinders. Technician B says that FCEVs commonly use PEM fuel cells. Who is correct?
   A. Technician A only
   B. Technician B only
   C. Both A and B
   D. Neither A nor B

Answer 8

C both

Question 9

9. When hydrogen is sourced using a reformation process, which of the following hydrocarbon fuels is most commonly used?
   A. Natural gas
   B. Gasoline
   C. Propane
   D. Coal

Answer 9

A natural Gas

Question 10

10. Where are the hydrogen cylinders usually located on a fuel cell-powered transit bus?
    A. On the roof
    B. Under the chassis frame
    C. In the forward engine compartment
    D. In the rear engine compartment

Answer 10

A on the roof

Question 11

11. What effect does H2 cryo-compression have on the fuel used to power fuel cells?
    A. It reduces its weight.
    B. It increases its density.
    C. It makes it less flammable.
    D. All are correct.

Answer 11

D all

Question 12

12. Technician A says that H2 dispensed at a refueling station labeled H70 is pressurized at 10,150 psi (70 MPa). Technician B says that H2 dispensers at a refueling station labeled H35 are currently being phased out. Who is correct?
    E. Technician A only
    F. Technician B only
    G. Both A and B
    H. Neither A nor B

Question 13

13. Which of the following best describes H2 cryo-compression?
    A. Super-cooled H2 in gaseous state
    B. Super-cooled H2 in liquid state
    C. Blue hydrogen
    D. Gray hydrogen

Answer 13

B liquid state

Question 14

14. Using the information provided in this chapter, which of the following automobile OEMs has a prominent recent history of producing automotive FCEVs?
    A. Stellantis
    B. Alfa Romeo
    C. Tesla
    D. Hyundai

Answer 14

D hyundai

Question 15

15. Which of the following domestic commercial vehicle OEMs have had FCEVs in production for over 10 years?
    A. Kenworth
    B. Mack Trucks
    C. New Flyer
    D. Caterpillar

Answer 15

C new flyer