CS/B.TECH(PWE)/SEM-8/PWE-803A/2012
2012
MANUFACTURING SCIENCE
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10 × 1 = 10
i) Casting process used for ornaments and toys of nonferrous
alloys is
a) slush casting b) die casting
c) pressed casting d) investment casting.
ii) Fettling is an operation performed
a) before casting b) during casting
c) after casting d) after heat treatment.
iii) Loam sand comprises
a) 50% sand and 10% moisture
b) 40% sand and 10% moisture
c) 50% sand and 18% moisture
d) 80% sand and 20% moisture.
iv) Cold working of metal increases
a) tensile strength b) hardness
c) yield strength d) all of these.
v) In rolling operations, the roll rotates with a surface
velocity
a) lower than the speed of incoming metal
b) exceeding the speed of incoming metal
c) equal to the speed of incoming metal
d) none of these.
vi) Swaging is opposite of
a) forging
b) ring rolling combined with stretch forming
c) steam hammer forging
d) piercing.