Mechanical Engineering - Workshop Technology

16. 

In welding copper alloys with TIG arc welding

A. direct current with straight polarity is used
B. direct current with reversed polarity is used
C. alternating current is used
D. any one of these

Answer: Option A

Explanation:

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17. 

The algebraic difference between the minimum limit and the basic size is called

A. actual deviation
B. upper deviation
C. lower deviation
D. fundamental deviation

Answer: Option C

Explanation:

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18. 

The temperature of oxy-hydrogen flame is __________ oxy-acetylene flame.

A. same as
B. less than
C. more than

Answer: Option B

Explanation:

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19. 

Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?

A. Drawing
B. Extrusion
C. Rolling
D. Extrusion and rolling

Answer: Option D

Explanation:

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20. 

A saw which cuts wood during the return stroke of the saw is known as

A. push saw
B. pull saw or draw saw

Answer: Option B

Explanation:

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