MCQOPTIONS
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MCQOPTIONS
This section includes 1175 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. |
Difference at any instant between the value of the controlled variable and the set point is called the%! |
| A. | Deviation |
| B. | Derivative time |
| C. | Error ratio |
| D. | Differential gap |
| Answer» B. Derivative time | |
| 102. |
Multistage compression is necessary for high efficiency,%! |
| A. | If the ratio of the delivery pressure to the intake pressure exceeds 5:1 |
| B. | When large amount of gas is to be compressed |
| C. | When the delivered gas is desired at very high velocity |
| D. | None of these |
| Answer» B. When large amount of gas is to be compressed | |
| 103. |
Maxwell's thermodynamic relations applies to the%! |
| A. | Chemical systems in equilibrium |
| B. | Mechanical systems in equilibrium |
| C. | Irreversible thermodynamic processes |
| D. | Reversible thermodynamic processes |
| Answer» B. Mechanical systems in equilibrium | |
| 104. |
Electrode potential is not concerned with the measurment of%! |
| A. | PH value |
| B. | Temperature |
| C. | Viscosity |
| D. | Density |
| Answer» C. Viscosity | |
| 105. |
Addition of __________ to steel does not help in improving its machinability.%! |
| A. | Sulphur |
| B. | Silicon |
| C. | Lead |
| D. | Phosphorous |
| Answer» C. Lead | |
| 106. |
Eutectoid composition of carbon steel at room temperature is%! |
| A. | Cementite |
| B. | Pearlite |
| C. | Martensite |
| D. | Ferrite |
| Answer» C. Martensite | |
| 107. |
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is%! |
| A. | Cooled and dehumified |
| B. | Heated and humidified |
| C. | Cooled and humidified |
| D. | Heated and dehumidified |
| Answer» D. Heated and dehumidified | |
| 108. |
Unit molar solution of __________ is the best conductor of electricity.%! |
| A. | Sodium chloride |
| B. | Acetic acid |
| C. | Sulphuric acid |
| D. | Sucrose |
| Answer» D. Sucrose | |
| 109. |
Blast furnace is a%! |
| A. | Counter current reactor |
| B. | Co-current reactor |
| C. | Cross-current reactor |
| D. | Combination of all the three |
| Answer» B. Co-current reactor | |
| 110. |
Screws are specified by their __________ diameters.%! |
| A. | Minor |
| B. | Major |
| C. | Pitch |
| D. | None of these |
| Answer» C. Pitch | |
| 111. |
Streaklines, streamlines & pathlines are almost identical for __________ fluid flow.%! |
| A. | Ideal |
| B. | Uniform |
| C. | Steady |
| D. | None of these |
| Answer» D. None of these | |
| 112. |
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.%! |
| A. | 20 |
| B. | 60 |
| C. | 120 |
| D. | ‚à û |
| Answer» E. | |
| 113. |
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?%! |
| A. | Tin |
| B. | Lead |
| C. | Zinc |
| D. | Glass |
| Answer» E. | |
| 114. |
Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.%! |
| A. | Flanged iron |
| B. | Collar |
| C. | Flexible |
| D. | Expansion |
| Answer» C. Flexible | |
| 115. |
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 | |
| 116. |
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 | |
| 117. |
Which of the following is not an ore of zinc?%! |
| A. | Cerrusite |
| B. | Franklinite |
| C. | Calamine |
| D. | Troosite |
| Answer» B. Franklinite | |
| 118. |
Which of the following has rotten eggy smell?%! |
| A. | Hydrogen sulphide |
| B. | Styrene |
| C. | Phenol |
| D. | Dimethyl amine |
| Answer» B. Styrene | |
| 119. |
A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.%! |
| A. | Lack of free |
| B. | Excess of |
| C. | Decrease in |
| D. | None of these |
| Answer» C. Decrease in | |
| 120. |
In TIG welding, thoriated tungsten electrodes are used, because it%! |
| A. | Has higher current carraying capacity |
| B. | Has better electron emissivity |
| C. | Is stronger than ordinary tungsten |
| D. | Is easy to prepare |
| Answer» C. Is stronger than ordinary tungsten | |
| 121. |
In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)%! |
| A. | T = 15 - 0.0065 h |
| B. | T = 15 + 0.0065 h |
| C. | T = 0.0035 h - 15 |
| D. | T = 15 - 0.0035 h |
| Answer» B. T = 15 + 0.0065 h | |
| 122. |
In a good rimming steel%! |
| A. | Carbon and silicon should be low |
| B. | Silicon should be low but carbon should be high |
| C. | Both silicon & carbon should be high |
| D. | Silicon should be high but carbon should be low |
| Answer» B. Silicon should be low but carbon should be high | |
| 123. |
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 | |
| 124. |
Flywheel is provided in a machine to%! |
| A. | Provide structural strength to the shaft |
| B. | Smoothen the power impluses |
| C. | Help in quick starting of the machine |
| D. | None of these |
| Answer» C. Help in quick starting of the machine | |
| 125. |
Which of the following transducers is most commonly used for the measurement of shock and vibration ?%! |
| A. | Linear variable differential transducer (LVDT) |
| B. | Dial gauge |
| C. | Accelerometer |
| D. | None of these |
| Answer» D. None of these | |
| 126. |
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?%! |
| A. | Silica |
| B. | Lime |
| C. | Alumina |
| D. | Fluorite |
| Answer» D. Fluorite | |
| 127. |
__________ has a negative co-efficient of linear expansion.%! |
| A. | Iron |
| B. | Copper |
| C. | Rubber |
| D. | Nickel |
| Answer» C. Rubber | |
| 128. |
If Reynolds number is greater than 1, then the%! |
| A. | Viscous force is larger than the inertia force |
| B. | Inertia force is larger than the viscous force |
| C. | Inertia force is larger than the surface tension force |
| D. | Inertia force is larger than the gravitational force |
| Answer» C. Inertia force is larger than the surface tension force | |
| 129. |
Value of a material is usually considered as a relationship between%! |
| A. | Cost and profit |
| B. | Utility and appearance |
| C. | Utility and cost |
| D. | Reliability and utility |
| Answer» D. Reliability and utility | |
| 130. |
If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity%! |
| A. | Is trebled |
| B. | Remains unchanged |
| C. | Decreases by a factor of ‚à ö3 |
| D. | Decreases by a factor of 1/3 |
| Answer» C. Decreases by a factor of ‚Äö√ √∂3 | |
| 131. |
When a copper ball is heated, the largest percentage increase will be in its%! |
| A. | Radius |
| B. | Area |
| C. | Mass |
| D. | Volume |
| Answer» E. | |
| 132. |
Which drug is made from vegetables ?%! |
| A. | Pencilin |
| B. | Aspirin |
| C. | Quinine |
| D. | Insulin |
| Answer» D. Insulin | |
| 133. |
Absolute zero pressure can be attained at a temperature of%! |
| A. | 0°C |
| B. | 50°K |
| C. | 0°R |
| D. | None of these |
| Answer» D. None of these | |
| 134. |
The entropy change for a spontaneous process is%! |
| A. | > 0 for the system |
| B. | < 0 for the system |
| C. | > 0 for the system & the surrounding |
| D. | < 0 for the system & the surrounding |
| Answer» E. | |
| 135. |
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 | |
| 136. |
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when%! |
| A. | Strain rate is increased |
| B. | Grain size is increased |
| C. | Prior cold deformation is increased |
| D. | Not affected by any of the above parameters |
| Answer» B. Grain size is increased | |
| 137. |
Thermal expansion of solid is employed in the temperature measurement by a%! |
| A. | Bimetallic thermometer |
| B. | Thermocouple |
| C. | Mercury thermometer |
| D. | Resistance thermometer |
| Answer» B. Thermocouple | |
| 138. |
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 | |
| 139. |
Carbon percentage in high speed steel tool material is 0.6 to 1.0. The hardness of carbon tool steels is increased, when it is alloyed with%! |
| A. | Vanadium & chromium |
| B. | Silicon |
| C. | Tungsten |
| D. | Manganese |
| Answer» B. Silicon | |
| 140. |
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.%! |
| A. | Linearly |
| B. | Exponentially |
| C. | Logarithmically |
| D. | Inversely |
| Answer» B. Exponentially | |
| 141. |
The hardness of the lathe bed material is measured by the%! |
| A. | Shore sceleroscope |
| B. | Brinnel hardness tester |
| C. | Vicker's hardness tester |
| D. | Rockwell hardness tester |
| Answer» B. Brinnel hardness tester | |
| 142. |
__________ remains constant during the adiabatic cooling of moist air.%! |
| A. | Wet bulb temperature |
| B. | Dry bulb temperature |
| C. | Relative humidity |
| D. | Specific humidity |
| Answer» B. Dry bulb temperature | |
| 143. |
Dielectric%! |
| A. | Is an electrical insulating material |
| B. | Of low resistivity is preferred |
| C. | Should have high thermal conductivity |
| D. | Need not defy the corrosive action of chemicals |
| Answer» B. Of low resistivity is preferred | |
| 144. |
Addition of silicon to cast iron%! |
| A. | Promotes graphite module formation |
| B. | Improves its ductility |
| C. | Does not promote graphite flakes formation |
| D. | Increases the fluidity of molten metal |
| Answer» E. | |
| 145. |
Paint spray gun works on the principle of%! |
| A. | Bernoulli's theorem |
| B. | Boyle's law |
| C. | Newton's law of viscosity |
| D. | None of these |
| Answer» B. Boyle's law | |
| 146. |
Chromium molybdenum steel can not be welded using __________ welding.%! |
| A. | Thermit |
| B. | Electrical resistance |
| C. | Oxy-acetylene |
| D. | Any of these |
| Answer» C. Oxy-acetylene | |
| 147. |
Air-petrol ratio in an automotive petrol engine is around%! |
| A. | 14 : 1 |
| B. | 22 : 1 |
| C. | 25 : 1 |
| D. | 4 : 1 |
| Answer» B. 22 : 1 | |
| 148. |
Ferromagnetic material owe their properties to __________ inner sub-shells.%! |
| A. | Completely filled |
| B. | Partially filled |
| C. | Equally filled |
| D. | Vacant |
| Answer» C. Equally filled | |
| 149. |
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/A¬¨‚⧠| |
| 150. |
__________ addition increases the depth of hardness of steel.%! |
| A. | Chromium |
| B. | Nickel |
| C. | Tungsten |
| D. | Vanadium |
| Answer» B. Nickel | |