MCQ for welding processes

1. Quiz Test 1 Set-1 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. Which of the following is an example of fusion welding?
a) Arc welding b) Forge welding
c) Resistance welding d) Thermit welding with pressure
2. Which of the following welding process is used for welding of sheet metals in automobile and
air craft industries?
a) Shield metal arc welding b) Gas tungsten arc welding
b) Thermit welding d) Resistance welding
3. The voltage used in resistance welding is generally kept between
a) 4-12 volts b) 12-20 volts c) 20-28 volts d) 28-36 volts
4. The heat generated (H) in resistance welding is expressed by
a) I2Rt b) IR2t c) IRt2 d) 2IRT
5. In resistance welding, two electrodes are made of
a) Aluminum b) Copper c) Iron d) Bronze
6. In arc welding, arc initiation voltage is of the order
a) 20-60V b) 60-100V c) 100-140V d) 140-1 80V
7. Which of the following welding process uses non-consumable electrode?
a) Gas tungsten arc welding (TIG) b) Shielded metal arc welding
c) CO2 shielded welding d) Gas metal arc welding (MIG)
8. In arc welding, the three elements to be controlled to obtain satisfactory welding operation
are
a) Current, voltage and speed of travel b) Current, voltage and arc length
c) Current, arc length and speed of travel d) Voltage, arc length and speed of travel
9. In Gas tungsten arc welding (TIG) the following polarity is used
a) Direct current straight polarity (DCSP) b) Direct current reverse polarity (DCRP)
c) Alternating Current high frequency (ACHF) d) All of the above
10. In Gas metal arc welding (MIG) which of the following polarity is generally used
a) Direct current straight polarity (DCSP) b) Direct current reverse polarity (DCRP)
c) Alternating Current high frequency (ACHF) d) All of the above

2. Quiz Test 1 Set-2 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. The joint offering maximum reliability is
a. Riveted joint b. Adhesive joint
c. Weld joint d. Solder joint
2. Fundamental mechanism of solid state joining process involves
a. Plastic deformation b. Diffusion
c. Chemical interaction d. Epitaxial growth
3. Welding process does not use filler is
a. Gas tungsten arc welding b. Laser welding
c. Spot welding d. Submerged arc welding
4. Joining is
a) Zero process b) Negative Process
c) Positive Process d) Mixed Process
5. Process in which filler metal is not used named as
a) Autogenous welding b) Fusion welding
c) Solid state welding c) Resistance welding
6. Which one the following is NOT a characteristic of gas tungsten arc welding?
a) Clean weld b) Short arc length
c) Consumable electrode d) Use of argon or helium for shielding
7. Compared to spray transfer, the short circuit transfer requires
a) Smaller arc gap b) Larger arc gap
c) Arc gap does not matter d) High welding current
8. Cleanliness of a weld joint indicates
a) Weld joint free from impurities, inclusions, slag etc.
b) Dust free weld joint surface
c) Homogeneous structure of weld joint d) Easily cleanable weld joint
9. Cleanest weld metal is produced by
a. Gas metal arc welding process b. Shielded metal arc welding
c. Submerged arc welding d. Gas tungsten arc welding
10. Autogenous weld can be produced by
a. Gas tungsten arc welding b. Gas metal arc welding
c. Submerged arc welding d. Electroslag welding

3. Quiz Test 1 Set-3 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. For the development of weld joints, the arc welding processes use
a. Pressure b. Heat c. Diffusion d. Deformation
2. Polarity in case of DC arc welding effects of aluminium alloy
a. Heat generation b. Cleanliness of the weld metal
c. Arc stability d. All of the above
3. Smallest heat affected zone size is observed in case of
a. Gas metal arc welding process b. Shielded metal arc welding
c. Submerged arc welding d. Gas tungsten arc welding
4. Zr Coating on pure tungsten electrode results in
a. High welding speed b. Low current carrying capacity
c. Longer electrode life d. Reduced arc stability
5. Electrode material for spot welding electrode should not have
a. Higher wear resistance b. Higher electrical resistance
c. Higher thermal softening d. Higher thermal conductivity
6. Optimum pressure during resistance spot welding process ensures
a. Good electrical contact b. Arcing tendency
c. Deformation of near-surface layer of base metal in contact with electrode
d. Increased contact resistance
7. Solid state joining can cause problem of
a. Partial melting zone b. Porosity c. Softening of HAZ d. Crater cracks
8. In GTAW, which of the following process parameters setting will lead to widest heat
affected zone
a. Current- 160 A, Voltage- 10 V, Speed- 200 mm/min
b. Current- 200 A, Voltage- 14 V, Speed- 160 mm/min
c. Current- 160 A, Voltage- 10 V, Speed- 160 mm/min
d. Current- 200 A, Voltage- 14 V, Speed- 200 mm/min
9. Which one is not a joining technique?
a) Welding b) Machining c) Brazing d) Soldering
10. Which type of welding uses gas
a) Friction welding b) Electron beam welding
c) Oxy-acetylene welding d) Friction stir welding

4. Quiz Test 1 Set-4 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. Which of the following is an example of fusion welding?
b) Arc welding b) Forge welding
d) Resistance welding d) Thermit welding with pressure
2. Which of the following welding process is used for welding of sheet metals in automobile
and air craft industries?
c) Shield metal arc welding b) Gas tungsten arc welding
d) Thermit welding d) Resistance welding
3. The voltage used in resistance welding is generally kept between
a) 4-12 volts b) 12-20 volts c) 20-28 volts d) 28-36 volts
4. The heat generated (H) in resistance welding is expressed by
a) I2Rt b) IR2t c) IRt2 d) 2IRT
5. In resistance welding, two electrodes are made of
a) Aluminum b) Copper c) Iron d) Bronze
6. In arc welding, arc initiation voltage is of the order
a) 20-60V b) 60-100V c) 100-140V d) 140-1 80V
7. Which of the following welding process uses non-consumable electrode?
a) Gas tungsten arc welding (TIG) b) Shielded metal arc welding
c) CO2 shielded welding d) Gas metal arc welding (MIG)
8. In arc welding, the three elements to be controlled to obtain satisfactory welding operation
are
a) Current, voltage and speed of travel b) Current, voltage and arc length
c) Current, arc length and speed of travel d) Voltage, arc length and speed of travel
9. In Gas tungsten arc welding (TIG) the following polarity is used
a) Direct current straight polarity (DCSP) b) Direct current reverse polarity (DCRP)
c) Alternating Current high frequency (ACHF) d) All of the above
10. In Gas metal arc welding (MIG) which of the following polarity is generally used
a) Direct current straight polarity (DCSP) b) Direct current reverse polarity (DCRP)
c) Alternating Current high frequency (ACHF) d) All of the above

5. Quiz Test 1 Set-5 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. The joint offering maximum reliability is
a. Riveted joint b. Adhesive joint
c. Weld joint d. Solder joint
2. Fundamental mechanism of solid state joining process involves
a. Plastic deformation b. Diffusion
c. Chemical interaction d. Epitaxial growth
3. Welding process does not use filler is
a. Gas tungsten arc welding b. Laser welding
c. Spot welding d. Submerged arc welding
4. Joining is
a) Zero process b) Negative Process
c) Positive Process d) Mixed Process
5. Process in which filler metal is not used named as
a) Autogenous welding b) Fusion welding
c) Solid state welding c) Resistance welding
6. Which one the following is NOT a characteristic of gas tungsten arc welding?
a) Clean weld b) Short arc length
c) Consumable electrode d) Use of argon or helium for shielding
7. Compared to spray transfer, the short circuit transfer requires
a) Smaller arc gap b) Larger arc gap
c) Arc gap does not matter d) High welding current
8. Cleanliness of a weld joint indicates
a) Weld joint free from impurities, inclusions, slag etc.
b) Dust free weld joint surface
c) Homogeneous structure of weld joint d) Easily cleanable weld joint
9. Cleanest weld metal is produced by
a. Gas metal arc welding process b. Shielded metal arc welding
c. Submerged arc welding d. Gas tungsten arc welding
10. Autogenous weld can be produced by
a. Gas tungsten arc welding b. Gas metal arc welding
c. Submerged arc welding d. Electroslag welding

6. Quiz Test 1 Set-6 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. For the development of weld joints, the arc welding processes use
a. Pressure b. Heat c. Diffusion d. Deformation
2. Polarity in case of DC arc welding effects of aluminium alloy
a. Heat generation b. Cleanliness of the weld metal
c. Arc stability d. All of the above
3. Smallest heat affected zone size is observed in case of
a. Gas metal arc welding process b. Shielded metal arc welding
c. Submerged arc welding d. Gas tungsten arc welding
4. Zr Coating on pure tungsten electrode results in
a. High welding speed b. Low current carrying capacity
c. Longer electrode life d. Reduced arc stability
5. Electrode material for spot welding electrode should not have
a. Higher wear resistance b. Higher electrical resistance
c. Higher thermal softening d. Higher thermal conductivity
6. Optimum pressure during resistance spot welding process ensures
a. Good electrical contact b. Arcing tendency
c. Deformation of near-surface layer of base metal in contact with electrode
d. Increased contact resistance
7. Solid state joining can cause problem of
a. Partial melting zone b. Porosity c. Softening of HAZ d. Crater cracks
8. In GTAW, which of the following process parameters setting will lead to widest heat
affected zone
a. Current- 160 A, Voltage- 10 V, Speed- 200 mm/min
b. Current- 200 A, Voltage- 14 V, Speed- 160 mm/min
c. Current- 160 A, Voltage- 10 V, Speed- 160 mm/min
d. Current- 200 A, Voltage- 14 V, Speed- 200 mm/min
9. Which one is not a joining technique?
a) Welding b) Machining c) Brazing d) Soldering
10. Which type of welding uses gas
a) Friction welding b) Electron beam welding
c) Oxy-acetylene welding d) Friction stir welding

7. Quiz Test 1 Set-7 Date: 09-01-2020
Welding Technology Time Duration: 15 min
Note: Answer ALL Questions. 10 × ½ =5
1. Which one of the following is an example of solid state welding process
a) Gas Welding b) Gas Metal Arc Welding (GMAW)
c) Thermit Welding d) Friction Stir Welding (FSW)
2. Which among the following welding process uses non consumable electrode?
a) Gas Metal Arc Welding (GMAW) b) Tungsten Inert Gas Welding (TIG)
c) Submerged Arc Welding (SAW) d) Shielded Metal Arc Welding (SMAW)
3. Spot welding belong to the category of
a) Resistance welding b) Arc welding c) Thermit welding d) Forge welding
4. The ratio of aluminum and iron oxide in Thermit welding is
a) 1: 3 b) 2: 3 c) 3: 2 d) 3: 1
5. The major difficulty during welding of aluminum is due to its
a) low density b) Low melting point
c) high thermal conductivity d) High tendency of oxidation
6. Generally used fuel gas in Gas welding is
a) Helium b) Acetylene c) Argon d) Neon
7. The distance from the center of arc to the tip of electrode is known as
a) Arc depth b) Arc length c) Arc distance d) Arc radius
8. Which of the following is not a type of arc welding?
a) Metal Active Gas Welding (MAG) b) Tungsten Inert Gas Welding (TIG)
c) Thermit Welding d) Metal Inert Gas Welding (MIG)
9. Seam welding is
a) Fusion welding process b) Continuous spot welding process
c) Gas welding process d) Arc welding process
10. Spot welding is used for metal sheets having thickness in the range of
a) 0.5-3 mm b) 3-6 mm c) 6-9 mm d) 9-15 mm