Chemical Engineering Basics

751. When the wavelength of incident X-rays increases, the angle of diffraction

1. Decreases
2. Increases
3. Remain constant
4. Shows no systematic variation

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752. When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively

1. Decreases & increases
2. Increases & increases
3. Increases & decreases
4. Decreases & decreases

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753. Which of the following alloying elements is present in maximum percentage in high speed steel?

1. Molybdenum
2. Chromium
3. Tungsten
4. Vanadium

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754. Which of the following approaches the ideal gas behaviour most closely?

1. Wet steam
2. Saturated steam
3. Superheated steam
4. Saturated water

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755. Which of the following are considered applications of ultrasonic testing?

1. Determination of elastic constant
2. Detection of defects in metal
3. Measurement of material thickness
4. None of the above

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756. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?

1. Small punches, broaches reamers and springs
2. Cutlery, screws, rivets and files
3. Mandrels, twist drills, small lathe tools and razors
4. Forgings like can shaft, structural steel plate, threading dies and drawing dies

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757. Which of the following can be manufactured using powder metallurgy techniques?

1. Brake linings
2. Bearings
3. Carbide tool tips
4. All 'a', 'b' and 'c'

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758. Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

1. Admiralty brass
2. Stainless steel
3. Aluminium brass
4. Titanium

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759. Which of the following contributes maximum as main source of sulphur in the blast furnace charge?

1. Sinter
2. Coke
3. Iron ore
4. Limestone

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760. Which of the following does not discharge the dust collected as a dry solid?

1. Electrostatic precipitator
2. Wet scrubber
3. Bag filter
4. Gravity settling chamber

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