What percentage of urea is contained in the aqueous urea solution known as diesel exhaust fluid (DEF)?
A. 0.005%
B. 32%
C. 68%
D. 90%
Answer: B
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If X and Y are independent random variables with means 
=9.5 and 
=6.8, and standard deviations 
=0.4 and 
=0.1, find the means and standard deviations of the following:
a. 3X b. Y?X c. X+4Y
Engines with VTEC (variable timing electronic control) vary the valve duration to increase engine performance.
Answer the following statement true (T) or false (F)
Dividing a unit's cooling output in Btus during its normal annual usage period by the total energy consumed
during that same time determines _____. a. unit capacity b. HSPF c. SEER d. ARI rating
A generator bus (with a 1.0 per unit voltage) supplies a 150 MW, 50 Mvar load through a lossless transmission line with per unit (100 MVA base) impedance of j0.1 and no line charging. Starting with an initial voltage guess of 1.0? 30°, determine the first iteration value of the load bus voltage (magnitude and angle) using the Newton-Raphson power flow method.
What will be an ideal response?