WELDING SOLDERING AND BRAZING MCQ 1
WELDING SOLDERING AND BRAZING MCQ 1
1) Which type of transformer is used in arc welding?
None of these
Step-up
Step-down
one to one
Correct Answer (C)
2) The position in which it is easiest to weld is
horizontal
flat
vertical
Inclined
Correct Answer (B)
3) The electrode size refer to
diameter of its core wire
diameter of electrode
thickness of flux coating
length of electrode
Correct Answer (A)
4) In a gas welding plant, the leakage of the gas must be tested in all connections. In which following is applied for checking oxygen connections?
Soap water
Distilled water
Fresh water
Ordinary water
Correct Answer (C)
5) Which one of the following is not an arc welding process?
Laser welding
MIG welding
TIG welding
Atomic hydrogen welding
Correct Answer (A)
6) Which one of the following is not a fuel gas?
Coal gas
Hydrogen
Oxygen
Acetylene
Correct Answer (C)
7) During gas welding, sometimes the joining pieces get permanent change in shape and size from original. The reason for this defect is
localised, heating and cooling
unsuitable flame setting
edge preparation is not property done
unsuitable nozzle size is selected
Correct Answer (A)
8) Various gas cutting nozzle sizes are available. For selection of nozzle size which factor is to be considered in gas cutting?
Duration of cut
Purity of oxygen
Thickness of material
Type of cutting blow pipe
Correct Answer (C)
9) While gas cutting, to start the out, hold the cutting nozzle at angle 90 degree with the plate surface. How much distance to be maintained for gas cutting from the surface of metal to the tip of nozzle?
10 to 12 mm
6 to 9 mm
3 to 5 mm
1 to 2 mm
Correct Answer (C)
10) What is the purpose of tack welding before root welding?
To obtain complete penetration
To avoid over melting on starting point of the base metal
To avoid incomplete welding on both end of the joining parts
To maintain the gap and alignment of the joining parts
Correct Answer (D)
11) By which tool slag on welding bead is removed?
Chipping hammer
Brush
Slag
Gauge
Correct Answer (A)
12) Which device convert AC supply into DC supply?
Rectifier
Transformer
Voltmeter
None of these
Correct Answer (A)
13) When two plates are placed over each other at right angle for joint, then this joint is called? *
5 points
Butt joint
Edge joint
T-joint
Corner joint
Correct Answer (C)
14) Electrode in manual metallic arc welding is used as
filler metal
base metal
electrode
flux
Correct Answer (A)
15) The arc utilized in electric arc welding is ………………
low voltage, high current discharge
low voltage, low current discharge
high voltage, high current discharge
high voltage, low current discharge
Correct Answer (A)
16) One of the functions of electrode coating is
to increase welding current
to prevent rusting
to stabilise the arc
to control arc temperature
Correct Answer (C)
17) Various size filler rods are used in gas welding.The selection of filler rod size depends upon
thickness of material
welding position
type of metal to be joined
types of gas
Correct Answer (A)
18) Two operations are done in oxy-acetylene gas cutting, they are pre-heating and cutting. Which flame should be set for pre-heating before cutting?
Carburizing flame
Neutral flame
Slightly carburizing flame
Oxidizing flame
Correct Answer (B)
19) What type of gas flame should be used for bronze welding?
Neutral flame
Carburising flame
Oxidising flame
Slightly carburising flame
Correct Answer (C)
20) Main reason for slag inclusion is
use of high current
use of thick electrode
use of short arc
improper cleaning of workpiece
Correct Answer (D)
