1
GATE PI 2005
+2
-0.6
Two $$8$$ $$mm$$ thick steel plates are placed $$5$$ $$mm$$ apart and welded by a butt joint. Welding is carried out at $$20$$ $$V$$ and speed of $$5$$ $$mm/sec.$$ Heat transfer efficiency is $$0.80.$$ If the heat required to melt steel is $$10$$ $$J/m{m^3}$$ and melting efficiency is $$0.625.$$ The weld current (in Amperes) will be
A
$$100$$
B
$$200$$
C
$$300$$
D
$$400$$
2
GATE PI 2005
+2
-0.6
Match List - I (welding problems) with List - II (Causes) and select the correct answer using the codes given below the lists: A
$$A - 2,\,B - 1,\,C - 5,\,D - 3$$
B
$$A - 3,\,B - 4,\,C - 2,\,D - 1$$
C
$$A - 2,\,B - 4,\,C - 5,\,D - 3$$
D
$$A - 3,\,B - 1,\,C - 4,\,D - 2$$
3
GATE PI 2005
+2
-0.6
Consider the following statements:

The size of the heat affected zone (HAZ) will increase with
$$1.$$ increased starting temperature
$$2.$$ increased welding speed
$$3.$$ increased thermal conductivity of the base metal
$$4.$$ increase in base metal thickness

Which of the statements given above are correct?

A
$$1,2$$ and $$3$$
B
$$1$$ and $$3$$
C
$$1$$ and $$4$$
D
$$2$$ and $$3$$
4
GATE PI 2005
+2
-0.6
Consider the following statements :

The magnitude of residual stresses in welding depends upon
$$1.$$ Metal melted / deposited
$$2.$$ Design of weldment
$$3.$$ Support and clamping of components
$$4.$$ Welding process used

Which of the statements given above are correct?

A
$$1,2$$ and $$4$$
B
$$1,2$$ and $$3$$
C
$$1$$ and $$3$$
D
$$2$$ and $$3$$
GATE PI Subjects
Engineering Mechanics
Strength of Materials
Theory of Machines
Engineering Mathematics
Machine Design
Fluid Mechanics
Heat Transfer
Thermodynamics
Casting
Joining of Materials
Metal Forming
Machine Tools and Machining
Metrology
Industrial Engineering
EXAM MAP
Joint Entrance Examination