Mechanical Engineering - Workshop Technology

11. 

When the dimension is expressed as , then the basic size is

A. 20 mm
B. 20.035 mm
C. 20.025 mm
D. 19.975 mm

Answer: Option A

Explanation:

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12. 

In order to produce uniform packing of sand in the moulds, a __________ is used.

A. sand slinger
B. squeezing machine
C. jolt machine
D. stripper plate machine

Answer: Option A

Explanation:

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13. 

The difference between the upper limit and lower limt of a dimension is called

A. nominal size
B. basic size
C. actual size
D. tolerance

Answer: Option D

Explanation:

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14. 

Green sand is a mixture of

A. 30% sand and 70% clay
B. 50% sand and 50% clay
C. 70% sand and 30% clay
D. 90% sand and 10% clay

Answer: Option C

Explanation:

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15. 

The diaphragm moulding machine is used to

A. ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
B. ram the sand harder at the back of the mould and softer on the pattern face
C. produce uniform packing of sand in the mould
D. give uniform sand hardness throughout the mould

Answer: Option D

Explanation:

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