Mechanical Engineering - Workshop Technology

6. 

In arc welding, the electric arc is produced between the work and the electrode by

A. voltage
B. flow of current
C. contact resistance
D. all of these

Answer: Option C

Explanation:

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7. 

In a centrifugal casting method

A. core is made of sand
B. core is made of ferrous metal
C. core is made of non-ferrous metal
D. no core is used

Answer: Option D

Explanation:

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8. 

The draft or taper allowance on casting is generally

A. 1 to 2 mm/m
B. 2 to 5 mm/m
C. 5 to 10 mm/m
D. 10 to 15 mm/m

Answer: Option A

Explanation:

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9. 

Which of the following welding process uses non-consumable electrodes?

A. TIG welding
B. MIG welding
C. Manual arc welding
D. Submerged arc welding

Answer: Option A

Explanation:

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10. 

In a bilateral system of tolerance, the tolerance is allowed on

A. one side of the actual size
B. one side of the nominal size
C. both sides of the actual size
D. both sides of the nominal size

Answer: Option D

Explanation:

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