Fire in fuel gas pipelines is extinguished most effectively by
A. Spraying water
B. Blanketting the area with nitrogen atmosphere
C. Fire fighting foam
D. None of these
Answer: Option B
A. Spraying water
B. Blanketting the area with nitrogen atmosphere
C. Fire fighting foam
D. None of these
Answer: Option B
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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