1
GATE ME 1992
MCQ (Single Correct Answer)
+1
-0.3
The effect of rake angle on the mean friction angle in machining can be explained by
A
Sliding model of friction
B
Sticking and then sliding friction model
C
Sticking friction model
D
sliding and then sticking friction model
2
GATE ME 1992
Subjective
+5
-0
A low carbon steel is to be welded by the manual metal arc welding process using a linear $$V$$-$$I$$ characteristic $$DC$$ power source.

The following data is available.
$$O.C$$ voltage of the power source $$=62V,$$
$$S.C$$ current for the setting used $$=130A,$$
ARC length $$=4mm,$$
Traverse speed of welding $$=15cm/min$$
Efficiency of heat input $$ = 85\% $$
The relation between the arc length $$L$$ in $$mm$$
and arc voltage $$V$$ is $$V=20+1.5L$$
Calculate the heat input into the work piece.

3
GATE ME 1992
MCQ (Single Correct Answer)
+1
-0.3
For resistance spot welding of $$1.5$$ $$mm$$ thick steel sheets, the current required is of the order
A
$$10$$ $$Amp$$
B
$$100$$ $$Amp$$
C
$$1000$$ $$Amp$$
D
$$10,000$$ $$Amp$$
4
GATE ME 1992
Fill in the Blanks
+1
-0
In an explosive welding process, the ..................... (maximum/minimum) velocity of impact is fixed by the velocity of sound in the ............. (flyer / target) plate material.
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12