Technician A says that recirculating 6 to 10% inert exhaust gases back into the intake system increases peak temperature inside the combustion chamber and reduces NOx exhaust emissions. Technician B says that vacuum-operated EGR (Exhaust Gas Recirculation) valves are usually exhaust back pressure controlled to help match EGR flow into the intake with the load on the engine. Which technician is
correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
B
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One mole of an ideal gas, initially at 30°C and 1 bar, undergoes the following mechanically reversible changes. It is compressed isothermally to a point such that when it is heated at constant volume to 120°C its final pressure is 12 bar. Calculate Q, W, ?U, and ?H for the process.
What will be an ideal response?
What type of ship is used to transport truck-size storage containers loaded with products?
A. Tankers B. Barges C. Supertankers D. Container ships
The type of sprinkler head that uses a spring-loaded arm to bump water as it flows from the head is termed an ____________________ head
Fill in the blank(s) with correct word
Check rotor thickness variation by measuring with a micrometer calibrated in:
A. thousandths of an inch. B. ten-thousandths of an inch. C. hundreds of an inch D. centimeters.