Manufacturing process Multiple choice questions

Q. Non-Consumable electrode is used in

(A) GMAW

(B) GTAW

(C) MMAW

(D) Thermit welding

Q. Consumable electrode is used in the following process

(A) TIG welding

(B) Gas Metal Arc welding

(C) Thermit welding

(D) Resistance welding

Q. Fluxes are used while welding

(A) To increase the rate of welding,

(B) To clean the joint,

(C) To prevent oxidation of metal during welding,

(D) All the above.

Q. The material used for coating the electrode is called 

(A) Protective layer

(B) Binder

(C) Slag

(D) Flux

Q. In arc welding, the electric arc is produced between the work and the electrode by-

(A) voltage

(B) flow of current

(C) contact resistance

(D) all of the above

Q. During arc welding, eyes need to be protected against

(A) Intense glare

(B) Microwave

(C) High frequency wave

(D) UV ray and infrared radiations

Q. In arc welding, the arc length should be equal to

(A) 4.5 times the rod diameter

(B) 3 times the rod diameter

(C) 1.5 times the rod diameter

(D) electrode diameter

Q. The welding setup is said to have straight polarity when 

(A) work is connected to the positive terminal and the electrode holder to the negative terminal

(B) work is connected to the negative terminal and the electrode holder to the positive terminal.

(C) work is connected to the positive terminal and the electrode holder is earthed

(D) work is connected to the negative terminal and the electrode holder is earthed

Q. In arc welding, the temperature produced by the electric arc is of the order of

(A) 3000°C to 4000°C

(B) 4000°C to 5000°C

(C) 1000°C to 2000°C

(D) 6000°C to 7000°C

Q. Which of the following welding method uses a pool of molten metal?

(A) Carbon arc welding

(B) submerged arc welding

(C) MIG welding

(D) TIG welding

Q. In submerged arc welding an arc is produced between a 

(A) carbon electrode and the work

(B) metal electrode and the work

(C) bare metal electrode and the work

(D) two tungsten electrodes and the work

Q. Commonly used gases in TIG welding are

(A) Hydrogen & Oxygen,

(B) Hydrogen & Argon,

(C) Hydrogen & Helium,

(D) Helium & Argon

Q. The most commonly used flame in gas welding is

(A) neutral flame

(B) oxidising flame

(C) carburising flame

(D) all of the above

Q. Oxygen cylinder used in oxy acetylene gas welding is usually printed in _____colour

(A) black 

(B) white

(C) maroon

(D) yellow

Q. Acetylene cylinder used in oxy acetylene gas welding is usually printed in _____colour

(A) black 

(B) white

(C) maroon

(D) yellow

Q. The temperature of the inner luminous cone of neutral flame 

(A) 1800°C

(B) 2100°C

(C) 1250°C

(D) 3200°C

Q. Oxy-acetylene flame is used for welding of

(A) Monel

(B) Nickel

(C) Steel

(D) Bronze

Q. An example of resistance welding is

(A) TIG

(B) MIG

(C) SMAW

(D) Spot welding

Q. The electrode tip diameter(d) in spot welding should be equal to 

(A) √t

(B) 1.5√t

(C) 3√t

(D) 6√t

Q. Thermit, used in thermit welding is a mixture of 

(A) charcoal and iron oxide

(B) charcoal and aluminium

(C) iron oxide and aluminium

(D) none of the above 

Q. Which of the following is not a temporary joining process

(A) Welding

(B) Bolting

(C) Riveting

(D) Clamping

Q. In an arc welding process, which polarity is used to apply more heat to the electrode as compared with the base material?

(A) AC current

(B) DC current electrode negative

(C) DC current straight polarity

(D) DC current electrode positive

Q. Which metal has good weldability compared to the rest

(A) Mild steel

(B) Stainless steel

(C) Cast steel

(D) carbon steel

Q. The main constituents of soldering alloy are

(A) tin and lead

(B) zinc and copper

(C) tin, lead and magnesium

(D) zinc and lead

Q. Arc blow is 

(A) A casting defect

(B) A welding defect

(C) A forging defect

(D) A fitting defect

Q. The commonly used flux in brazing is 

(A) Borax

(B) resin

(C) Lead sulphide

(D) Zinc chloride

Q. In spot welding, the spacing between two spot weld should not be less than 

(A) d

(B) 1.5d

(C) 3d

(D) 6d