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ISRO 2018 Manufacturing Booster Quiz 2
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Question 1
What will be the height between the bottom of the sprue and free metal surface of the casting, having a gating ratio of 1 : 1.5 : 2. The height of metal during pouring in the basin is 100mm above the cope, where cope box has a height of 200 mm.
Question 2
An opening at the top of the mould that is connected to the mould cavity through runners from which the molten metal is poured is known as?
Question 3
In which of the following operation, feed is parallel to the surface being machined:
Question 4
Two cutting tools are being compared for a machining operation. The tool life equations are:
Carbide tool: VT1.6 = 3000
HSS tool: VT0.6 = = 200
where V is the cutting speed in m/min and T is the tool life in min. The carbide tool will provide higher tool life if the cutting speed in m/min exceeds
Question 5
Determine the diameter of spherical casting, whose solidification time was found to be 75 min. Take solidification Factor to be 0.97 × 106 s/m2.
Question 6
A casting of size 150 × 150 × 30 mm is to be casted. What would be the modulus of casting.
Question 7
A casting of size 10 cm × 10 cm × 5 cm is required. Assume volume shrinkage of casting as 2.6%. If the height of riser is 8 cm and riser volume desired is 4 times the shrinkage in casting, the riser diameter in mm is
Question 8
A cube shaped casting solidifies in 5 min. The solidification time for a cube of the same material, which is 8 times lighter than the original casting will be ________ minutes.
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