MCQOPTIONS
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MCQOPTIONS
This section includes 2253 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
With increase in annealing temperature, the following defect density decreases? |
| A. | Vacancy |
| B. | Dislocation |
| C. | Grain boundary |
| D. | All of these |
| Answer» E. | |
| 102. |
With increase in compression ratio, the volumetric efficiency of air compressor____________________? |
| A. | Increases |
| B. | Decreases |
| C. | Remain same |
| D. | May increase or decrease (depends on the suction pressure) |
| Answer» B. Decreases | |
| 103. |
With increase in impurities in metals, their corrosion resistances____________________? |
| A. | Increase |
| B. | Decrease |
| C. | Remain same |
| D. | May increase or decrease; depending on the type of metal |
| Answer» C. Remain same | |
| 104. |
With increase in steam pressure, its specific volume decreases ____________________? |
| A. | Rapidly first and then slowly |
| B. | Linearly |
| C. | Slowly first and then rapidly |
| D. | Exponentially |
| Answer» B. Linearly | |
| 105. |
With increase in temperature, the electrical conductivity of a _________________ decreases ? |
| A. | Semi-conductor |
| B. | Metal or alloy |
| C. | Dielectric |
| D. | None of these |
| Answer» B. Metal or alloy | |
| 106. |
With increase in temperature, the surface tension of water_______________________? |
| A. | Increases |
| B. | Decreases |
| C. | Remain constant |
| D. | Increases linearly |
| Answer» C. Remain constant | |
| 107. |
With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and _____________ is not affected ? |
| A. | Impact strength |
| B. | Percent elongation |
| C. | Hardness |
| D. | Both B & C |
| Answer» B. Percent elongation | |
| 108. |
Wohler test is a destructive test to find out the ___________________ strength of a prepared metal specimen ? |
| A. | Creep |
| B. | Fatigue |
| C. | Endurance |
| D. | Tensile |
| Answer» C. Endurance | |
| 109. |
Wood is a/an ______________ material ? |
| A. | Amorphous |
| B. | Cellular |
| C. | Homogeneous |
| D. | Granular |
| Answer» C. Homogeneous | |
| 110. |
Work done by a/an _________________ process is determined by ∫p. dv ? |
| A. | Adiabatic |
| B. | Quasi-static |
| C. | Isothermal |
| D. | Isentropic |
| Answer» C. Isothermal | |
| 111. |
Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and ___________________? |
| A. | Manganese |
| B. | Silicon |
| C. | Nickel |
| D. | Chromium |
| Answer» B. Silicon | |
| 112. |
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ? |
| A. | +4000 |
| B. | -4000 |
| C. | 10000 |
| D. | -10000 |
| Answer» B. -4000 | |
| 113. |
Work study deals with the _______________ study? |
| A. | Time |
| B. | Motion |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 114. |
Working of linear variable differential transducer (LVDT) is based on the principle of variable_____________________? |
| A. | Capacitance |
| B. | Resistance |
| C. | Mutual inductance |
| D. | None of these |
| Answer» D. None of these | |
| 115. |
Wrought iron does not have__________________? |
| A. | Uniform strength in all directions |
| B. | Ability to hold protective coating |
| C. | High ductility & corrosion resistance |
| D. | Easily weldable characteristics |
| Answer» B. Ability to hold protective coating | |
| 116. |
Wrought iron is never shaped by__________________? |
| A. | Casting |
| B. | Cold working |
| C. | Forging |
| D. | Welding |
| Answer» B. Cold working | |
| 117. |
Wrought iron is not____________________? |
| A. | Ductile & resistant to corrosion/rusting |
| B. | Weldable easily |
| C. | Having uniform strength in all directions |
| D. | Having maximum tensile strength along the lines of slag distribution |
| Answer» D. Having maximum tensile strength along the lines of slag distribution | |
| 118. |
X-rays are__________________? |
| A. | Positively charged |
| B. | Negatively charged |
| C. | Neutral |
| D. | Of higher wavelength than visible light |
| Answer» D. Of higher wavelength than visible light | |
| 119. |
Yield strength of a polycrystalline metal with an average grain size „d’, is proportional to ____________________? |
| A. | d1/2 |
| B. | d-1/2 |
| C. | d |
| D. | d-1 |
| Answer» C. d | |
| 120. |
Young’s modulus of a material is the measure of its ___________________? |
| A. | Stiffness |
| B. | Malleability |
| C. | Creep resistance |
| D. | Tensile strength |
| Answer» B. Malleability | |
| 121. |
Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young’s modulus, G = Modulus of rigidity or shear modulus v = Poisson’s ratio) ? |
| A. | E = 2G (1 + v) |
| B. | E = G (1 + v) |
| C. | E = G (1 + v)/2 |
| D. | E = 2G (1 + 2v) |
| Answer» B. E = G (1 + v) | |
| 122. |
Which of the following rays has the least wavelength ? |
| A. | Ultraviolet rays |
| B. | Infrared rays |
| C. | Cosmic rays |
| D. | X-rays |
| Answer» D. X-rays | |
| 123. |
Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part ? |
| A. | Anodising |
| B. | Tempering |
| C. | Carburising |
| D. | Annealing |
| Answer» C. Carburising | |
| 124. |
Which of the following phenomenon will exhibit the minimum heat transfer ? |
| A. | Boiling |
| B. | Forced convection in air |
| C. | Free convection in air |
| D. | Conduction in air |
| Answer» E. | |
| 125. |
Which of the following metals is the most prone to work hardening ? |
| A. | Brass |
| B. | Aluminium |
| C. | Copper |
| D. | Lead |
| Answer» B. Aluminium | |
| 126. |
Which of the following metals is not subjected to electrolytic refining/purification ? |
| A. | Copper |
| B. | Zinc |
| C. | Tin |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 127. |
Which of the following metals cannot be hot worked at room temperature ? |
| A. | Zinc |
| B. | Nickel |
| C. | Lead |
| D. | Tin |
| Answer» C. Lead | |
| 128. |
Which of the following is the most wear resistant grade of carbide used for the cutting tools ? |
| A. | Aluminium carbide |
| B. | Tungsten carbide |
| C. | Nickel carbide |
| D. | Iron carbide |
| Answer» C. Nickel carbide | |
| 129. |
Which of the following is the largest quantum of pressure ? |
| A. | 1 kg/cm2 |
| B. | 1 bar |
| C. | 1 atmosphere |
| D. | 1 kilo Pascal |
| Answer» D. 1 kilo Pascal | |
| 130. |
Which of the following is preferred for riveting ? |
| A. | Lap joint |
| B. | Butt joint |
| C. | Either A. or B. |
| D. | Neither A. nor B. |
| Answer» C. Either A. or B. | |
| 131. |
Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ? |
| A. | Styrofoam |
| B. | Lucite |
| C. | Perspex |
| D. | Plexiglass |
| Answer» B. Lucite | |
| 132. |
Which of the following is not an ore of copper ? |
| A. | Cryolite |
| B. | Azurite |
| C. | Chalcopyrite |
| D. | Malachite |
| Answer» B. Azurite | |
| 133. |
Which of the following is not a principal alloying element for the structural steel ? |
| A. | Molybdenum |
| B. | Nickel |
| C. | Manganese |
| D. | Chromium |
| Answer» B. Nickel | |
| 134. |
Which of the following is a commonly used manometric liquid for low pressure range ? |
| A. | Ethyl alcohol |
| B. | Carbon tetrachloride |
| C. | Glycerol |
| D. | Ethylene glycol |
| Answer» C. Glycerol | |
| 135. |
Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2) ? |
| A. | High speed steel |
| B. | Stainless steel |
| C. | Tungsten carbide |
| D. | Superalloys |
| Answer» D. Superalloys | |
| 136. |
Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ? |
| A. | A, C, B, D |
| B. | D, B, C, A |
| C. | D, C, B, A |
| D. | D, A, B, C |
| Answer» C. D, C, B, A | |
| 137. |
Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog ? |
| A. | Nitrogen oxides |
| B. | Hydrocarbons |
| C. | Both A. & B. |
| D. | Carbon monoxide |
| Answer» D. Carbon monoxide | |
| 138. |
Which of the following commonly used condenser tube materials has the lowest thermal conductivity ? |
| A. | Admiralty brass |
| B. | Stainless steel |
| C. | Aluminium brass |
| D. | Titanium |
| Answer» C. Aluminium brass | |
| 139. |
Which of the following can be manufactured using powder metallurgy techniques ? |
| A. | Brake linings |
| B. | Bearings |
| C. | Carbide tool tips |
| D. | All A, B and C |
| Answer» E. | |
| 140. |
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%? |
| A. | Small punches, broaches reamers and springs |
| B. | Cutlery, screws, rivets and files |
| C. | Mandrels, twist drills, small lathe tools and razors |
| D. | Forgings like can shaft, structural steel plate, threading dies and drawing dies |
| Answer» B. Cutlery, screws, rivets and files | |
| 141. |
Which of the following alloying elements is present in maximum percentage in high speed steel ? |
| A. | Molybdenum |
| B. | Chromium |
| C. | Tungsten |
| D. | Vanadium |
| Answer» B. Chromium | |
| 142. |
When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively____________________? |
| A. | Decreases & increases |
| B. | Increases & increases |
| C. | Increases & decreases |
| D. | Decreases & decreases |
| Answer» B. Increases & increases | |
| 143. |
When the wavelength of incident X-rays increases, the angle of diffraction__________________? |
| A. | Decreases |
| B. | Increases |
| C. | Remain constant |
| D. | Shows no systematic variation |
| Answer» B. Increases | |
| 144. |
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the _________________? |
| A. | Partial pressure of water vapour is less than the total pressure |
| B. | Humidity is < 100% & dew point temperature of air has not reached |
| C. | Dew point temperature of air has not reached & air is not saturated fully |
| D. | Air is fully saturated |
| Answer» E. | |
| 145. |
When an isolated thermodynamic system executes a process ___________________? |
| A. | Work is done |
| B. | Heat transfer takes place |
| C. | Mass flow occurs across the boundary of the system |
| D. | No chemical reaction takes place within the system |
| Answer» E. | |
| 146. |
What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively ? |
| A. | 2 |
| B. | 8 |
| C. | 10 |
| D. | 40 |
| Answer» B. 8 | |
| 147. |
Wavelength of radiation emitted by a body depends on the ________________ of its surface? |
| A. | Temperature |
| B. | Area |
| C. | Nature |
| D. | All ‘A’, ‘B’ & ‘C’ |
| Answer» B. Area | |
| 148. |
Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________? |
| A. | Paper |
| B. | Cloth |
| C. | Lead |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 149. |
Water-tube boiler is the one, in which _____________________? |
| A. | Water passes through tubes and flue gases around it |
| B. | Tube carrying hot flue gases are immersed in a pool of water |
| C. | Tubes are placed in vertical position |
| D. | None of these |
| Answer» B. Tube carrying hot flue gases are immersed in a pool of water | |
| 150. |
Water hammer is caused in steam carrying pipelines, because of ______________________? |
| A. | Partial condensation of steam |
| B. | Vibration of the pipeline |
| C. | High degree of superheat of steam |
| D. | Its exposure to torrential rain |
| Answer» B. Vibration of the pipeline | |