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

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The production of portland cement involves only one simple process.

Answer the following statement true (T) or false (F)

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What are the symptoms of insufficient light in plants?

What will be an ideal response?

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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.

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