Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.

A、the Customs

B、the Register Bureau of Shipping

C、the Shipyard Fire Department

D、a certified gas chemist

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更多“Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.”相关的问题

第1题

[单选题] Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.

A、the customs  B、the Register Bureau of shipping  C、the shipyard fire department  D、a certified gas chemist  

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第2题

[单选题] Before welding can be done in a tank that has carried petroleum products, a certificate must be obtained from（）.

A、the customs  B、the register bureau of shipping  C、the shipyard fire department  D、a certified gas chemist  

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第3题

[单选题] Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure? （）

A、Tearing through the member is more likely in this type connection  B、The weld may be broken by the stresses caused by riveting  C、The weld increases the tensile stress on the rivet heads  D、The welding must be completed before the riveting commences  