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.
| 2101. |
Which of the following is not an ore of iron ? |
| A. | Chalcopyrite |
| B. | Magnetite |
| C. | Hemetite |
| D. | Limonite |
| Answer» B. Magnetite | |
| 2102. |
Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal. |
| A. | burning |
| B. | intensive oxidation |
| C. | evaporation |
| D. | none of these |
| Answer» C. evaporation | |
| 2103. |
The order of a chemical reaction |
| A. | can be determined only experimentally |
| B. | can be determined from the stoichiometry of the reaction. |
| C. | can not be zero. |
| D. | can be fractional. |
| Answer» C. can not be zero. | |
| 2104. |
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight |
| A. | 1.5 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» C. 5 | |
| 2105. |
The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at |
| A. | the outer edge of the rod. |
| B. | r/3 from the centre. |
| C. | r/2 from the centre. |
| D. | the centre. |
| Answer» E. | |
| 2106. |
Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV. |
| A. | 20 |
| B. | 200 |
| C. | 500 |
| D. | 1000 |
| Answer» C. 500 | |
| 2107. |
Aromatics are desired constituents of |
| A. | lubricating oil |
| B. | diesel |
| C. | kerosene |
| D. | petrol |
| Answer» D. petrol | |
| 2108. |
Machinability of hard alloys and tool steels is improved by |
| A. | spherodising |
| B. | annealing |
| C. | tempering |
| D. | normalising |
| Answer» C. tempering | |
| 2109. |
Which of the following materials is not suitable as a die material for wire drawing? |
| A. | Diamond |
| B. | Tungsten carbide |
| C. | Tool steel |
| D. | Bronze |
| Answer» E. | |
| 2110. |
The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double. |
| A. | flow output |
| B. | head developed |
| C. | overall efficiency |
| D. | weight |
| Answer» B. head developed | |
| 2111. |
Which of the following exemplifies resemblence with the extrusion process ? |
| A. | Pneumatic ejection of abrasive solid particles through a nozzle. |
| B. | Toothpaste pouring out of the tube. |
| C. | Ejection of abrasive slurry through an opening. |
| D. | Viscous lubricant pouring out through its container's mouth. |
| Answer» C. Ejection of abrasive slurry through an opening. | |
| 2112. |
Density in the solid state is slightly less than that in its liquid state, in case of |
| A. | carbon dioxide |
| B. | water |
| C. | mercury |
| D. | none of these. |
| Answer» C. mercury | |
| 2113. |
Heat treatment of steel is done to mainly change its __________ properties. |
| A. | physical |
| B. | chemical |
| C. | mechanical |
| D. | surface |
| Answer» D. surface | |
| 2114. |
Dislocation cross-slip is difficult in those materials, which have |
| A. | large number of slip systems. |
| B. | high work hardening rate. |
| C. | coarse grain size. |
| D. | low stacking fault energy. |
| Answer» E. | |
| 2115. |
Nusselt number/Biot number varies |
| A. | inversely with thermal conductivity. |
| B. | directly with heat transfer co-efficient. |
| C. | directly with thermal conductivity. |
| D. | inversely with the dimension of the solid. |
| Answer» B. directly with heat transfer co-efficient. | |
| 2116. |
The velocity of sound in air is independent of changes in its |
| A. | humidity |
| B. | pressure |
| C. | temperature |
| D. | none of these |
| Answer» C. temperature | |
| 2117. |
Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs? |
| A. | enthalpy |
| B. | relative humidity |
| C. | wet bulb temperature |
| D. | dew point temperature |
| Answer» E. | |
| 2118. |
The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the |
| A. | resilience |
| B. | toughness |
| C. | ductility |
| D. | impact strength |
| Answer» B. toughness | |
| 2119. |
Which of the following fastening devices has a head at one end and a nut fitted to the other ? |
| A. | Bolt |
| B. | Stud |
| C. | Top bolt |
| D. | None of these |
| Answer» C. Top bolt | |
| 2120. |
Knocking tendency in a petrol engine decreases with increasing |
| A. | supercharging |
| B. | compression ratio |
| C. | wall temperature |
| D. | engine speed |
| Answer» E. | |
| 2121. |
The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it. |
| A. | tension |
| B. | shear |
| C. | compression |
| D. | bending & tension |
| Answer» B. shear | |
| 2122. |
Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven ? |
| A. | Collar joint |
| B. | Flexible joint |
| C. | Flanged joint |
| D. | Expansion joint |
| Answer» C. Flanged joint | |
| 2123. |
Mild steel has __________ crystal lattice structure. |
| A. | face centred cubic (fcc) |
| B. | body centred cubic (bcc) |
| C. | orthorhombic |
| D. | cubic |
| Answer» C. orthorhombic | |
| 2124. |
Semi-conductors normally employ __________ bonding. |
| A. | co-ordinate |
| B. | ionic |
| C. | covalant |
| D. | metallic |
| Answer» D. metallic | |
| 2125. |
Which of the following represents the correct time-temperature curve when a block of metal is heated above room temperature & then left to cool in the room following Newton's law of cooling in which the rate of temperature drop will go on decreasing with the passage of time. |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» D. | |
| 2126. |
__________ is the most important element, which controls the physical properties of steel. |
| A. | Manganese |
| B. | Silicon |
| C. | Carbon |
| D. | Vanadium |
| Answer» D. Vanadium | |
| 2127. |
At room temperature, F.C.C. crystal structure is observed in |
| A. | lead |
| B. | cupro-nickel |
| C. | titanium |
| D. | tungsten |
| Answer» B. cupro-nickel | |
| 2128. |
Holes for rivetting purposes should be preferably made by |
| A. | cutting torch |
| B. | drilling |
| C. | punching |
| D. | none of these |
| Answer» C. punching | |
| 2129. |
The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) |
| A. | A |
| B. | D |
| C. | 1/A |
| D. | 1/A2 |
| Answer» D. 1/A2 | |
| 2130. |
Which of the following has rotten eggy smell ? |
| A. | Hydrogen sulphide |
| B. | Styrene |
| C. | Phenol |
| D. | Dimethyl amine |
| Answer» B. Styrene | |
| 2131. |
Dezincification is a form of corrosion espe-cially applicable to |
| A. | brass |
| B. | nichrome |
| C. | stainless steel |
| D. | monel |
| Answer» B. nichrome | |
| 2132. |
Most important property of steels for use in automobile bodies is the |
| A. | formability |
| B. | yield strength |
| C. | toughness |
| D. | resilience |
| Answer» B. yield strength | |
| 2133. |
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are |
| A. | cobalt, chromium & tungsten, |
| B. | cobalt, chromium & nickel. |
| C. | molybdenun, tungsten & chromium. |
| D. | cobalt, zirconium & molybdenum. |
| Answer» B. cobalt, chromium & nickel. | |
| 2134. |
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) | |
| 2135. |
Dislocations are __________ defects. |
| A. | point |
| B. | line |
| C. | volume |
| D. | none of these |
| Answer» C. volume | |
| 2136. |
Factor of safety is the ratio of the __________ stress to the working stress. |
| A. | tensile |
| B. | compressive |
| C. | yield |
| D. | bearing |
| Answer» D. bearing | |
| 2137. |
The ability of a substance to assume two or more crystalline structure is called |
| A. | isomorphism |
| B. | polymorphism |
| C. | amorphism |
| D. | isomerism |
| Answer» C. amorphism | |
| 2138. |
High __________ of cast iron makes it suitable for use in machine beds. |
| A. | compressive strength |
| B. | endurance strength |
| C. | damping capacity |
| D. | tensile strength |
| Answer» B. endurance strength | |
| 2139. |
Percentage of gaunge is maximum in the ore of |
| A. | iron |
| B. | gold |
| C. | zinc |
| D. | copper |
| Answer» C. zinc | |
| 2140. |
Springback in sheet metal bending depends on the |
| A. | elastic limit |
| B. | bend radius |
| C. | degree of bend |
| D. | thickness of sheet |
| Answer» E. | |
| 2141. |
The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam. |
| A. | wetness |
| B. | mass flow rate |
| C. | both 'a' & 'b' |
| D. | neither 'a' nor 'b' |
| Answer» D. neither 'a' nor 'b' | |
| 2142. |
Calorific value of __________ are almost same. |
| A. | lignite & anthracite coal |
| B. | lignite & coal gas |
| C. | petrol & diesel |
| D. | coal gas & natural gas |
| Answer» D. coal gas & natural gas | |
| 2143. |
What is the value of included angle of a triangular notch for maximum discharge ? |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» D. 120¬∞ | |
| 2144. |
The best guide to judge the general quality of water is the measurement of its |
| A. | pH value. |
| B. | electrical conductivity. |
| C. | turbidity. |
| D. | dissolved oxygen content. |
| Answer» C. turbidity. | |
| 2145. |
Non-ferrous alloys used for making cutting tools need not have high |
| A. | abrasion resistance |
| B. | toughness |
| C. | red hardness |
| D. | cutting speed |
| Answer» C. red hardness | |
| 2146. |
Commonly employed coolant for high pressure turbogenerator is |
| A. | air |
| B. | carbon dioxide |
| C. | hydrogen |
| D. | water |
| Answer» D. water | |
| 2147. |
A material being tested for endurance strength is subjected to the __________ load. |
| A. | impact |
| B. | completely reversed |
| C. | dynamic |
| D. | static & dynamic |
| Answer» C. dynamic | |
| 2148. |
Air-petrol ratio in an automotive petrol engine is around |
| A. | 0.58402777777778 |
| B. | 0.91736111111111 |
| C. | 1.0423611111111 |
| D. | 0.16736111111111 |
| Answer» B. 0.91736111111111 | |
| 2149. |
Inertial forces are obtained, when the elastic forces are multiplied by __________ number. |
| A. | Mach |
| B. | Froude |
| C. | Reynolds |
| D. | Euler |
| Answer» B. Froude | |
| 2150. |
Out of the following, the dimensionless quantity is |
| A. | specific weight |
| B. | viscosity |
| C. | Mach number |
| D. | density |
| Answer» D. density | |