Chemical Engineering Basics

31. __________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten.

1. Stellite
2. High speed steel
3. Cermet
4. Alnico

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32. __________ is used as a material of construction for the blade of power saw.

1. Wrought iron
2. Stainless steel
3. Mild steel
4. High speed steel

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33. __________ is used for tying the steel columns to concrete foundation.

1. Grouting
2. Eyebolt
3. Anchor bolts
4. Refractory castables

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34. __________ joint is mostly used for joining pipes carrying water at low pressure.

1. Nipple
2. Socket
3. Union
4. Bell and spigot

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35. __________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.

1. Collar
2. Flanged
3. Bell and Spigot
4. Expansion

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36. __________ metal is used as a bearing liner material.

1. Pewter
2. White
3. Babbitt
4. Gun

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37. __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

1. Mach
2. Reynolds
3. Froude
4. Weber

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38. __________ of air does not increase with increase in temperature.

1. Density
2. Thermal diffusivity
3. Viscosity
4. Thermal conductivity

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39. __________ of austenite decreases the hardenability in steel.

1. Fine grains
2. Coarse grains
3. Homogeneity
4. Dissolved elements (except cobalt)

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40. __________ of grey cast iron produces white cast iron.

1. Tempering
2. Rapid heating
3. Rapid cooling
4. Slow cooling

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