chemical engineering chemical engineering basics MCQs – Page 7

Practise multiple-choice questions from chemical engineering chemical engineering basics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs
121. Addition of _____________________ to steel does not impart hardness?
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A. Nickel

B. Silicon

C. Chromium

D. Copper
122. 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 ?
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A. 2537

B. 1837

C. 159

D. 10000

123. Which of the following is an acidic constituent of B.F. slag ?
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A. CaO

B. SiO2

C. FeO

D. MgO

124. ________________ property of steel increases by addition of large amount of silicon in it?
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A. Machining

B. Mechanical

C. Magnetic

D. Refractory

125. Dislocations are _______________ defects?
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A. None of these

B. Volume

C. Line

D. Point

126. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?
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A. Vapor pressure

B. Saturated humidity

C. Absolute humidity

D. Aqueous tension
127. Larger length & diameter water pipes are made by____________________?
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A. Continuous casting

B. Die casting

C. Semi-centrifugal casting

D. Electrical resistance welding

128. Which of the following is not used as a bearing material ?
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A. Cermets

B. Copper-lead alloys

C. Babbitts

D. Bronzes

129. Spherical shape of mercury droplets is due to its____________________?
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A. High density

B. High viscosity

C. High surface tension

D. Low surface tension

130. Wavelength of radiation emitted by a body depends on the ________________ of its surface?
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A. Nature

B. Area

C. Temperature

D. All A, B & C

131. Which of the following is an unconventional source of energy ?
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A. Nuclear-fusion power

B. Hydroelectric power

C. Thermal power

D. Solar power
132. In TIG welding, thoriated tungsten electrodes are used, because it ____________________?
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A. Is stronger than ordinary tungsten

B. Has better electron emissivity

C. Has higher current carrying capacity

D. Is easy to prepare

133. Powder metallurgy process does not make metal powder by_________________________?
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A. Hammering

B. Electrolytic deposition

C. Atomisation

D. Grinding/milling

134. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is_____________________?
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A. 3CaO. Al2O3

B. 5CaO. 3 Al2O3

C. 2CaO. SiO2

D. 3CaO. SiO2

135. Carbon is present in the form of _______________________ in grey cast iron ?
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A. Flakes

B. Cementite

C. Nodular aggregates of graphite

D. Spheroids

136. Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?
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A. Heat

B. Volume

C. Entropy

D. Pressure

137. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?
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A. 1:04

B. 2:01

C. 1 : 1

D. 1:02

138. Boiling point of water gets lowered at high altitudes (e.g., hills), because ___________________?
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A. Atmospheric pressure is low

B. None of these

C. Atmospheric pressure is high

D. Temperature is low

139. Which one of the following is incombustible ?
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A. S

B. C2H2

C. H2

D. CCl4
140. Basic open hearth furnace (BOF) is not used for producing ______________ steel?
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A. None of these

B. Killed

C. Rimming

D. High alloy