Preheating prior to welding is done for the purpose of
A. Decreasing cooling rate
B. Facilitating fusion of high melting metals
C. Preventing hot cracking
D. Ensuring full penetration
Answer: Option A
A. Decreasing cooling rate
B. Facilitating fusion of high melting metals
C. Preventing hot cracking
D. Ensuring full penetration
Answer: Option A
Which of the following will resist maxi-mum shock & vibration without cracking?
A. Grey cast iron
B. White cast iron
C. Malleable iron
D. Graphite
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
Isotropic materials have the same __________ in all directions.
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties
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