1
GATE PI 1989
MCQ (Single Correct Answer)
+2
-0.6
In welding a mild steel sheet using an oxy-acetylene flame, the total amount of acetylene consumed was $$8.0$$ liters the oxygen consumption from the cylinder is
A
$$8.0$$ ltrs
B
$$16$$ ltrs
C
$$20$$ ltrs
D
$$24$$ ltrs
2
GATE PI 1989
Subjective
+2
-0
Match the following GATE PI 1989 Joining of Materials - Welding Question 39 English
3
GATE PI 1989
MCQ (Single Correct Answer)
+1
-0.3
In $$HSS,$$ the tungsten can be substituted by
A
Chromium
B
Nickel
C
Molybdenum
D
Cobalt
4
GATE PI 1989
Subjective
+5
-0
Calculate the tonnage capacity of the broaching machine required to broach on the hole under the following conditions.
Diameter of the finished hole $$=75mm,$$
rise per tooth $$=0.03mm$$
Tooth pitch $$=10mm,$$
Length of the broach $$=750mm$$
Cutting speed $$=6m/min,$$
specific cutting pressure $$ = 1300 \times {t^{0.4}}\,\,N/m{m^2},$$ (Where $$t$$ is the uncut chip thickness)
If the tool and work handling time is $$0.5min,$$ estimate the production rate per hour
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