During normal engine operation if a DPF does not get hot enough to burn off the collected soot inside of it, it will need to:
a. perform an active regeneration
b. perform a passive regeneration
c. perform a reverse flow regeneration
d. be removed for thorough cleaning
A
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The welding process, PW, is always included in the tail for this particular weld.
Answer the following statement true (T) or false (F)
The most efficient operation is achieved with:
A) Thermostatic expansion valves. B) Orifice-type metering devices. C) Capillary tubes. D) Automatic expansion valves.
A spring-mass-damper seismograph vibrometer can accurately measure slow vibration like those contained in an earthquake signal because it is has
A. a small valued seismic mass and a compliant (low stiffness) spring B. a large valued seismic mass and a compliant (low stiffness) spring C. a small valued seismic mass and a stiff spring D. an extremely large piezoelectric crystal E. a large valued seismic mass and a stiff spring
You can change directions of strip flooring by joining groove edge to groove edge and inserting a ____.
a.sleeper b.rack c.block d.spline