When more volume of acetylene and less volume of oxygen is supplied, then a __________ flame is obtained.
A. neutral
B. oxidising
C. carburising
D. none of he above
Answer C
When the dimension is expressed as , then the basic size is
A. 20mm
B. 20.035 mm
C. 20.025 mm
D. 19.975 mm
Answer A
The metal patterns as compared to wooden patterns require less
A. shrinkage allowance
B. machining allowance
C. draft allowance
D. distortion allowance
Swab is used for
A. smoothing and cleaning out depressions in the mould
B. cleaning the moulding sand
C. moistening the sand around the edge before removing pattern
D. reinforcement of sand in the top part of the moulding box
A casting defect which occurs due to improper venting of sand is known as
A. cold shuts
B. blow holes
C. Shifts
D. swells
Answer B
