Technician A says that advancing diesel fuel injection timing by one degree can cause greatly increased NOx in the end gas. Technician B says that retarding diesel fuel injection timing tends to increase the output of HC in the exhaust gas. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
You might also like to view...
Retempering of mortar means ______.
A) adding lime to mortar. B) adding Portland cement to mortar. C) adding sand to mortar. D) adding water to mortar.
Match each of the following definitions with their related terms
a. science of soil management and crops b. plant grown for appearance and beauty c. management of agricultural resources d. science of fruits, vegetables, and ornamentals e. sciences of animal growth, care and management f. growing and managing living things in water g. application of mechanical and other engineering principles in agriculture h. grass used for decorative and soil-holding purposes i. science of insect life j. commercial firms developed in support of agriculture 1. entomology 2. horticulture 3. agronomy 4. animal sciences 5. agricultural economics 6. agricultural engineering 7. aquaculture 8. agribusiness 9. ornamental 10. turf
Which of the following operating conditions is more likely to cause a diesel engine, catalytic converter to plug?
A. light load, cold temperature operation B. high load, lugdown C. light load, rated speed operation D. high load, operation in torque rise
The rotary screw compressor uses an open motor instead of the hermetic design.
Answer the following statement true (T) or false (F)