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Which of the following statement(s) is/are true regarding butt welding? 1. Flash butt welding is a combination of resistance, arc and pressure welding 2. Upset butt welding is used for welding rods 3. Percussion Welding is a self timing spot welding method 4. Aluminium alloys are flash welded
An alloy of Nickel and Chromium is to be made such that the alloy comprises of 80% Nickel and 20% Chromium. Mixture A comprises of 60% Nickel and 40% Chromium, while mixture B comprises of 90% Nickel and 10% Chromium. In what ratio should the mixtures be mixed in order to obtain the desired alloy?
Consider the following statements regarding welded and riveted joints 1. Welded assemblies are tight and leak proof as compared with riveted assemblies. 2. Single-welded V-joint is less reliable than square butt joint. 3. Welding results in a thermal distortion of the parts, thereby inducing residual stresses. Which of the above statements is/are correct ?
In two types of stainless steel, the ratio of chromium and steel are 2 : 11 and 5 : 21 respectively. In what proportion should the two types be mixed so that the ratio of chromium to steel in the mixed type becomes 7 : 32 ?
In two types of stainless steel the ratio of chromium and steel are 2 : 11 and 5 : 21 respectively. In what proportion should the two types be mixed so that the ratio of chromium to steel in the mixed type becomes 7 : 32 = ?
The power source in a particular welding setup generates 4000 W that can be transferred to the work surface with a heat transfer factor = 0.9. The metal to be welded is low carbon steel, whose melting temperature, is 1800 K. The melting factor in the operation is 0.6. A continuous fillet weld is to be made with a cross-sectional area = 20 mm2. Determine the travel speed at which the welding operation can be accomplished? (K = 3.33 *10-6)
Which of the following elements determine maximum attainable hardness in the steel? 1. Chromium 2. Manganese 3. Carbon 4. Molybdenum Select the correct answer using codes given below:
Molybdenum steel consists of molybdenum and _________
Which two of the following joining processes are autogenous? i. Diffusion welding ii. Electroslag welding iii. Tungsten inert gas welding iv. Friction welding
Molybdenum steels containing 0.15 to 0.40% molybdenum