chemical engineering chemical engineering basics MCQs – Page 6

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 Review each marked answer and report any item that may be outdated or unclear.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
101. Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is____________________?
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A. Zero

B. Very high which prevents their ignition by compression

C. Very low which prevents their ignition by compression

D. None of these

102. _______________ has a negative co-efficient of linear expansion?
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A. Nickel

B. Rubber

C. Iron

D. Copper
103. Particle nature of cathode rays is proved due to the fact that they ________________?
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A. Produce fluorescence

B. Heat the exposed material

C. Travel in a straight line

D. Get deflected by magnetic electric field
104. Working of linear variable differential transducer (LVDT) is based on the principle of variable_____________________?
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A. Capacitance

B. Mutual inductance

C. Resistance

D. None of these

105. Minimum number of members required to form a Public Limited Joint Stock Com-pany is___________________?
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A. 12

B. 17

C. 7

D. 10

106. In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is__________________?
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A. Much more

B. More

C. Less

D. Equal
107. A spring material should have low__________________?
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A. Deflection value

B. Elastic limit

C. Fatigue resistance

D. None of these
108. Cementite is in the lamellar form in the _____________________ phase of steel ?
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A. Martenistic

B. Bainitic

C. Ferritic

D. Pearlitic
109. Which of the following is not a dielectric material ?
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A. All refractory materials

B. Cotton, silk and paper

C. Asbestos, glass, porcelain and mica

D. Rubber and polymeric resins
110. Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?
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A. 35

B. 10

C. 20

D. 5

111. Upto the critical radius of insulation, added insulation, will____________________?
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A. Decrease heat flux

B. Decrease heat loss and will have no effect beyond that

C. Increase the heat loss

D. Reduce convection heat loss compared to conduction heat less

112. Transformation range for ferrous material is the temperature interval during which ___________________ is formed during its heating?
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A. Austenite

B. Martensite

C. Pearlite

D. Cementite

113. Youngs modulus of a material is the measure of its ___________________?
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A. Creep resistance

B. Stiffness

C. Malleability

D. Tensile strength

114. The most suitable material of construction for a sewer to carry sewage under high pressure is________________________?
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A. Stoneware

B. Cement concrete

C. Asbestos cement

D. Steel
115. Which of the following is used to produce draught in the locomotive boilers ?
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A. Induced draught fan

B. Forced draught fan

C. Chimney

D. Steam jet arrangement
116. What is the value of entropy at 273K ?
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A. 0

B. 1

C. ?

D. None of these

117. In Newtons law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?
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A. V2

B. 1/Vg

C. 1/V2

D. Vg
118. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
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A. Temperature of hot pipe surface & that of air in the room

B. Diameter & length of the pipe

C. Emissivity of pipe surface

D. None of these
119. Angular displacement can be measured suitably by a______________________?
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A. Shaft encoder

B. Linear variable differential transducer (LVDT)

C. Stroboscope

D. Tachometer

120. Plastics as a material of construction suffer from the drawback of low_________________?
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A. Plastic deformation

B. Density

C. Machinability

D. Strength