No.	Question	A	B	C	D	Answer
82	Welding tip size is determined by	A. the thickness of base metal	B. the orfice diameter	C. the acetylene working pressure	D. both A and B	A B C D
83	The purpose of a flux in brazing is to	A. help fill voids in the joint surface	B. dissolve and remove oxides	C. remove paint and grease from the surface	D. form a gas shield	A B C D
84	What evidence is there in an oxygen - acetylene flame that tells you there is too much acetylene	A. a soft popping sound	B. a loud hissing sound	C. no cone visible in the flame	D. the presents of a feather in the flame	A B C D
85	When welding mild steel with the OAW process, a / an_________ flame should be used	A. carburizing	B. neutral	C. oxidizing	D. reducing	A B C D
86	An oxygen-acetylene flame has a temperature of approximately	A. 2300 F.	B. 4280 F.	C. 5280 F.	D. 6000 F.	A B C D
87	Welding tips and cutting tips are usually constructed of	A. copper	B. brass	C. monel	D. aluminum	A B C D
88	When cutting, the space that is left is known as the	A. drag	B. line of cut	C. lag	D. kerf	A B C D
89	When silver brazing the flame should be adjusted to	A. slightly carburizing	B. neutral	C. oxidizing	D. carburizing	A B C D
90	In which of the following work areas is braze welding of greatest use	A. domestic building construction	B. repair and maintenance work	C. heavy equipment manufacture	D. pipe fabrication industry	A B C D
91	In torch brazing, when the brazing temperature is reached, the flux will	A. turn to a crystal clear solid	B. have a reddish glow	C. start to flow and spread evenly	D. start to bubble slightly and spread evenly at the edges	A B C D