What are some possible causes of burner flashback?

What will be an ideal response?


Improper gas pressure, improper air adjustment

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El símbolo de climatización marcado con la letra E en la Figura 1 representa un/a _____.



a. ducto de aire caliente
a. ducto de retorno de aire
acondicionado
c. abertura para rejilla
d. toma de suministro de
pared

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The OSI layer responsible for error detection, framing, error recovery, and flow control is the:

A) presentation layer B) session layer C) physical layer D) transport layer E) data link layer F) application layer

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A(n) ____ is a simple variable that holds a number or a string.

A. label B. constant C. scalar D. identifier

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The most predominate voltage used for application to coils in relays and contactors is ____________________ volts.

Fill in the blank(s) with the appropriate word(s).

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