Late model diesel engines control soot emissions by using a(an) ________
A) Engine operated vacuum pump B) Diesel particulate filter (DPF)
C) Engine operated air pump D) None of these
B
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List the various vitamins. What is their importance in the animal’s body?
What will be an ideal response?
Discuss what the "tragedy of the commons" refers to
What will be an ideal response?
The ill effects of acidity in subsoils can be ameliorated by adding gypsum (CaSO4-2H2O) to the soil surface. Which of the following most likely helps account for this effect?
A) Gypsum stimulates root growth in the surface soil horizons. B) Sulfate ions from the gypsum react with H ions in the subsoil to form H2SO4. C) Calcium from the gypsum replaces hydrogen from colloids in the subsoil thereby increasing the soil pH. D) Gypsum dissolves and leaches downward, increasing the Ca/Al ratio in the soil solution in subsoil layers. E) The gypsum replaces hydrogen from colloids which moves down the profile and decreases the pH of the subsoil layers.
A pending code is set when a fault is detected on ________
A) The first fault of a two-trip failure B) A one trip fault item C) The catalytic converter efficiency D) Thermostat problem (too long to closed-loop status)