Verification of initial burning or ignition is done via ________ for v – McqOptions

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1.	Verification of initial burning or ignition is done via ________ for visual detection and ________ for heat detection in some rocket engines.
A.	photocell; pyrometer
B.	pyrometer; photocell
C.	bolometer; pyrometer
D.	load cell; pyrometer
Answer» B. pyrometer; photocell

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