# Material heat cut by oxy-cutting process is

1.  brass

2.  copper

3.  bronze

4.  mild steel

4

mild steel

Explanation :
No Explanation available for this question

# Oxy-acetylenes flame cuts metals by its

1.  evapotation

2.  oxidation

3.  burning

4.  intensive oxidation

4

intensive oxidation

Explanation :
No Explanation available for this question

# In inert gas arc welding, Which of the following isused for welding stainless steel, copper or iron

1.  Non-combustible electrode in combination with helium and d.c.current

2.  Combustible electrode and argon in combination with d.c.current

3.  Straight polarity d.c. current

4.  Carbon dioxide, because of its excellent penetration and high speed

4

Straight polarity d.c. current

Explanation :
No Explanation available for this question

# Oxygen to acetylene ratio in case of carbursing

1.  0.5:1

2.  0.9:1

3.  1:1

4.  1:1.2

4

0.9:1

Explanation :
No Explanation available for this question

# Carbursing flame is used to weld metals like

1.  steel

2.  copper and brass

3.  aluminium, stainless steel, zine die castings nickel, model

4.  carburized steel

4

aluminium, stainless steel, zine die castings nickel, model

Explanation :
No Explanation available for this question

# In forehand gas welding operation, the angle between the rod and work is kept around

1.  30 0C

2.  450C

3.  600 C

4.   900C

4

30 0C

Explanation :
No Explanation available for this question

# The mathematical technique for finding the best use of limited resources in optimum manner is called

1.  Operation research

2.  Linear programming

3.  Network analysis

4.  Queuing theory

4

Linear programming

Explanation :
No Explanation available for this question

# In order that linear programming techniques provide valid result, the

1.  Relation between factors must be linear(positive)

2.  Relation between factors must be linear(negative)

3.  Both (a) or (b)

4.  Only one factor should change at a time, other remaining constant

4

Both (a) or (b)

Explanation :
No Explanation available for this question

# The linear programming techniques can be applied successfully to industries like

1.  Iron and steel

2.  Food processing

3.  Oil and chemical

4.  Banking

5.  All of these

5

All of these

Explanation :
No Explanation available for this question

# The simplex method is the basic method for

1.  Value analysis

2.  Operation research

3.  Linear programming

4.  Model analysis

4