1) If the blowpipe is moved to and fro frequently while cutting the kerf will
of correct size
not be affected
be less
2) In gas cutting, if too little cutting oxygen is supplied
the metal will be cooled down
the kerf will be narrow
the kert will be wide
3) The top edge is melted round and the surface is not smooth in gas cutting. This is due to
extremely slow cutting speed
insufficient acetylene pressure
too much-cutting oxygen pressure
4) In a gas cut plate, the cut shows groove sand has deep draglines. This is due to
too much travel speed
less oxygen pressure
smaller size cutting nozzle
tip too close to the cut surface
5) In a gas cut plate, the cut is high quality although there is some surface roughness caused by vertical draglines. This is due to
too slow cutting speed
smaller size cutting nozzle
impure cutting oxygen
less preheating flame
6) The size of the cutting nozzle used in the oxyacetylene cutting process depends mainly on
duration of cut
purity of oxygen
type of cutting blowpipe
7) Which of the following types is not fillet weld?
butt joint
T-joint
Corner joint
lap joint
8) Double-V and double-U butt welds are used for plates of thickness
1 - 5 mm
5 - 10 mm
10 - 15 mm
9) Which material is not used for making non-consumable electrodes?
Tungsten
Graphite
Carbon
Sodium
10) Which of the following is an example of plastic welding?
Arc welding
Forge welding
Thermit welding
Gas welding
11) Which of the following is not a type of arc welding?
Air-acetylene
Plasma
Electro-slag
Submerged
12) Which of the following is an example of fusion welding?
Arc welding
Forge welding
Resistance welding
Thermit welding with pressure
13) Which of the following welding process is used for welding of sheet metals in automobile and aircraft industries?
Thermit welding
Shield metal arc welding
Gas tungsten arc welding
Resistance welding
14) In which of the following process, heat is created by blacksmith fire
Seam welding
Spot welding
Projection welding
Forge welding
15) Heat is created by a chemical reaction in
Thermit welding
Tungsten arc welding
Oxy-acetylene welding
Resistance welding
16) In resistance welding, two electrodes are made of
Aluminum
Bronze
Iron
Copper
17) Acetylene can be prepared by the chemical reaction between
Hydrogen and Calcium carbide
Hydrogen and Calcium carbonate
Water and Calcium carbonate
Water and Calcium carbide
18) Which flame is suitable for cutting operations?
Carburizing flame
Neutral flame
None of the above
Oxidizing flame
19) Which flame is suitable for welding steel?
Oxidizing flame
Carburizing flame
Neutral flame
None of the above
20) Which of the following is not true for gas welding?
There are safety problems in storing and handling the gases.
It is suitable for thin sheets.
Heat affected zone and distortion are less as compared to arc welding.
It is slower than arc welding.
No comments:
Post a Comment