Which of these takes place during regeneration in a diesel particulate filter (DPF)?
A) Soot is being burned.
B) The catalytic converter is being purged.
C) The oxygen sensor is being cleaned.
D) The EGR system is being actively tested.
A
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Let X represent the lifetime of a component, in weeks. Let Y represent the lifetime of the component in days, so Y = 7X. Suppose X ~ Exp(?).
a. Let 
be the cumulative distribution function of Y and let 
be the cumulative distribution function of X. Show that 
.
b. Show that Y ~ Exp(?/7).
The two main types of fan drives are:
A) Planetary gear drive and worm gear drive. B) Direct drive and belt drive. C) Magnetic drive and hydrodrive. D) Serpentine belt and chain drive.
Countertop receptacles mounted within _____ feet of a wet bar sink must be provided with ground fault circuit
interrupter protection. A) 2 B) 4 C) 6 D) 8
Carry the answer to two decimal places. Find the total weight of a 52-gallon steel drum and its contents if it contains 52 gallons of varnish weighing 8.16 pounds per gallon. The drum alone weighs 37.5 pounds.
Fill in the blank(s) with the appropriate word(s).