3rd class boiler exam questions with answers.

3rd /




class boiler exam questions with
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answers
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A /



fusible
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plug
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is primarily used to: - CORRECT ANSWERS(S)✔✔Indicate a
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low water condition in the boiler
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An /



injector: -
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CORRECT ANSWERS(S)✔✔Has a high thermal efficiency
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A /



return
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trap,
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will - CORRECT ANSWERS(S)✔✔Only feed condensate to a
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boiler
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Water /



will
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boil
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at
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,/ 212"F, /



/ when /



/ the /



/ pressure /



/ corresponding /



/ to /



/ its /



/ boiling /



/ point /



/ is
/



/ approximately? - // /



/ CORRECT /



/ ANSWERS(S)✔✔14.7 pounds per square inch absolute // // // // //




The /



maximum
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rotative
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speed
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of
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an
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engine
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is
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limited
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by
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which
/ /



one
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of these problems? - CORRECT ANSWERS(S)✔✔Fly Wheel
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,Once /



the
/ /



ignition
/ /



temperature
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is
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reached,
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the
/ /



completeness
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of
/ /



combustion
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is
/ /



dependent
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upon? -
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CORRECT ANSWERS(S)✔✔The rate of oxygen supply
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Insulating /



materials should be? - CORRECT ANSWERS(S)✔✔Non-
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Conductive


As /



the
/ /



temperature
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of
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water
/ /



increases,
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the
/ /



pressure
/ /



head
/ /

, / that /



/ can /



/ be /



/ produced /



/ with a pump: - CORRECT ANSWERS(S)✔✔Decreases
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Internal /



cleaning
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is
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required
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before
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a /



new
/ /



boiler
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is
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placed
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into
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service: -
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CORRECT
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ANSWERS(S)✔✔To
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remove
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protective
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coating,
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grease, and other foreign materials incidental to erection
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The /



purpose
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of
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