41]How are electrode holders rated? 용접홀더의 성능을 어떻것으로 알수있나?
[a]by voltage carrying capacity [b]by maximum electrode size
[c]by amperge carrying capacity # [d]by the size of welding cable used
42]Loose work lead connections when using SMAW may cause;
SMAW사용시 커낵션 입구가 헐거워져 지는 이유는?
[a]electrical shork [b]magnetic arc blow
[c]high burn-offrates [d]arcing at the work clamp #
43]AN adventage to using a magnetic work lead device over a spring-loaded
clamp is that the magnetic connection;마그네틱 고정장치는마그네틱 연결부의
자력으로 사용할때 의 장점은?
[a]effectively prevents arc blow [b]is less likely to damage the work by arcing#
[c]is a permanently attached connection [d]can be attached to all metals
44]If the welding cable from the machine is size 1/0,then the whip cable could
be what size?용접기에서 용접케이블 의 크기가 1/0인경우,케이블 탄력의사이즈는?
[a] 4/0 [b]3/0 [c]2/0 [d] 2 #
45]The ability of a metal to permanently deform under load without breaking is known as.
파괴시험 없이 연하중이 걸려 훼손이 되는 불변강으로 알려진것은?
[a]ductiliy # [b]brittleness [c]toughness [d]elasticity
46]The ultimate pull that a metarial will withstand is called.
재료를 끝까지 당겻을때 견뎌내는 성질을 무엇이라 부르는가?
[a]yield strength [b]tensile strength # [c]ductility [d]elasticity
47]Impact test,such as Izod or charpy,are designed to measure.
아이조드 또는 샤르피충격시험 을 실행시 형태를 측정할수있는것은?
[a]the weld metal's hardness [b]the weld metal's ductility.
[c]the ability of the weld to withstand abrasion [d]the weld's impact strengh#
48]The point at which a material begins to defrom permanently under load is called its.
재료의 시작점에서 변형 시켯을때 불변강으로 불리우는것은 어느것인가?
[a]yeild point # [b]ultimate tensile strength
[c]ductile fracture point [d]brittleness limit
49]Dynamically loaded structures are subject to.
구조물에 하중이 물리적으로 걸린다면 어떤문제가 생기는가?
[a]constant pressure [b]reversals of stress #
[c]loads that do not impact [d]stationary loading conditions.
50]Which is the best example of a dynamically loaded structure?
구조상에 물리적인 하중이 생길때,구체적으로 가장 먼저 해야할것은?
[a]the pillars supporting the roof of a steel oil storage tank
[b]the column supporting the wall in a building
[c]the boom on a crane making a lift,and then swinging the load #
[d]the base plate on a stationary pipe rack