Chemical Engineering Basics

791. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

1. Styrofoam
2. Lucite
3. Perspex
4. Plexiglass

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792. Which of the following is not the function of a volute casing provided in a centrifugal pump?

1. To reduce the head loss in discharge
2. To increase the pump efficiency
3. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity
4. To increase the pump discharge rate

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793. Which of the following is not used as a bearing material?

1. Copper-lead alloys
2. Babbitts
3. Bronzes
4. Cermets

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794. Which of the following is preferred for riveting?

1. Lap joint
2. Butt joint
3. Either (A) or (B)
4. Neither (A) nor (B)

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795. Which of the following is prone to cup and cone fracture?

1. Cast iron
2. Soft brass
3. Round specimen of ductile metal
4. Flat tensile specimen of ductile metal

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796. Which of the following is resistant to the action of both heat & chemicals?

1. Borosilicate glass
2. Silica glass
3. Soda lime glass
4. None of these

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797. Which of the following is the largest quantum of pressure?

1. 1 kg/cm²
2. 1 bar
3. 1 atmosphere
4. 1 kilo Pascal

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798. Which of the following is the most suitable abrasive for grinding high tensile strength materials?

1. Silicon carbide
2. Corundum
3. Aluminium oxide
4. Boron carbide

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799. Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

1. Aluminium
2. Copper
3. Titanium
4. Stainless steel

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800. Which of the following is the most wear resistant grade of carbide used for the cutting tools?

1. Aluminium carbide
2. Tungsten carbide
3. Nickel carbide
4. Iron carbide

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