91. The most preferred process for casting gas turbine blades is
die casting
shell moulding
investment moulding
sand casting
✅ The correct answer is option B.
Workshop Technology MCQs
92. Most of the oxy-acetylene welding is done with
neutral flame
oxidising flame
carburising flame
all of these
✅ The correct answer is option A.
93. The acetylene cylinder is usually painted with
black colour
white colour
maroon colour
yellow colour
✅ The correct answer is option C.
94. Thermit welding is often used in
replacing broken gear teeth
repairing broken shears
joining rails, truck frames and locomotive frames etc.
all of the above
✅ The correct answer is option D.
95. The welding process used in joining mild steel shanks to high speed drills, is
spot welding
seam welding
flash butt welding
upset butt welding
✅ The correct answer is option C.
96. In permanent mould casting method
molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
molten metal is poured and allowed to solidify while the mould is revolving
molten metal is forced into mould under high pressure
none of the above
✅ The correct answer is option D.
97. Piercing is an operation of cutting
a cylindrical hole in a sheet of metal by the punch and the die
a hole (other than cylindrical) in a sheet of metal by the punch and the die
a flat sheet to the desired shape
a number of holes even
✅ The correct answer is option B.
98. Shrinkage allowance is made by adding to external dimensions and subtracting from internal dimensions.
Agree
Disagree
✅ The correct answer is option A.
99. In order to deliver molten metal from pouring basin to gate, a __________ is used.
riser
sprue
core
✅ The correct answer is option B.
100. In electric resistance welding, pressure applied varies from
1 to 5 MPa
5 to 10 MPa
10 to 25 MPa
25 to 55 MPa
✅ The correct answer is option D.