When water vapor in a boiler's stack gas gives up latent heat to the water returning to the boiler, the boiler is said to be a ________________
A. non-condensing boiler
B. condensing boiler
C. fire tube boiler
D. water tube boiler
B
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An arc-quenching device is used to ensure ____.
a. better extinguishing action b. better contact c. longer contact life d. more powerd. more power
The production of portland cement involves only one simple process.
Answer the following statement true (T) or false (F)
What are the symptoms of insufficient light in plants?
What will be an ideal response?
After repairing a faulty EGR circuit which caused black smoke exhaust on a 2008 Ford diesel pickup, technician replaces the DPF. Technician B removes, cleans our accumulated ash and reinstalls the DPF. Which technician used the correct procedure?
A. Technician A only. B. Technician B only. C. Both A and B. D. Neither A nor B.