Chemical Engineering Basics - Chemical Engineering Questions and Answers

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Presence of nickel & chromium in steel does not raise its

elastic limit

machining properties

ductility

resilience

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Hot extrusion process is not used for making

cast iron pipe for domestic water supply.

aluminium curtain rods.

stainless steel tubes used in furnitures.

any of these.

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Addition of __________ to steel does not help in improving its machinability.

sulphur

silicon

lead

phosphorous

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Quartz is a __________ material.

diamagnetic

ferromagnetic

ferroelectric

piezoelectric

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The units of the rate constant for a second order reaction are

sec^-1. mole°.

moles¹. sec^-1.

moles^-1. sec¹.

moles¹. sec¹.

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The most serious manufacturing defect from fracture toughness point of view is

surface roughness

pores

spherical inclusion

crack

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Leakage in a cooking gas cylinder is detected by

radio-isotopes.

pouring soap solution on the surface and locating the gas bubbles.

halide torch.

pungent smell of mercaptans present in the gas.

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

Aluminium carbide

Tungsten carbide

Nickel carbide

Iron carbide

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The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

159

1837

2537

10000