MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 256 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. |
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively_________________? |
| A. | – 273° & 80° |
| B. | 0° & 80° |
| C. | 32° & 460° |
| D. | 32° & 80° |
| Answer» C. 32° & 460° | |
| 102. |
Range of hydrogen gas constant volume thermometer is _____________ °C? |
| A. | -10 to 20 |
| B. | 0 to 100 |
| C. | 100 – 500 |
| D. | 400 – 1000 |
| Answer» C. 100 – 500 | |
| 103. |
Radiation thermometer cannot measure the temperature ___________________? |
| A. | Inside a pressure vessel |
| B. | Of an object without coming in contact with it |
| C. | Of liquid oxygen |
| D. | Of moving objects at high temperature |
| Answer» D. Of moving objects at high temperature | |
| 104. |
Radiation pyrometers as compared to thermocouples____________________? |
| A. | Has a slower speed of response |
| B. | Can measure higher temperature |
| C. | Can’t measure the temperature of moving objects |
| D. | Is more affected by corrosive atmosphere |
| Answer» C. Can’t measure the temperature of moving objects | |
| 105. |
Pyrometry refers to the measurement of temperature_________________? |
| A. | With the mercurial thermometer upto 350°C |
| B. | Directly |
| C. | Which is of higher magnitude |
| D. | All A., B. & C. |
| Answer» D. All A., B. & C. | |
| 106. |
Process degree of freedom indicates _______________ number of controllers to be used? |
| A. | The maximum |
| B. | The minimum |
| C. | Both maximum and the minimum |
| D. | Nothing about the |
| Answer» B. The minimum | |
| 107. |
Pressure of 0.01 psi (absolute) can be measured by ______________ gauge? |
| A. | Ionisation |
| B. | Pirani |
| C. | Mcleod |
| D. | None of these |
| Answer» D. None of these | |
| 108. |
Pressure of 0.0001 absolute psi can be measured by _____________ gauge? |
| A. | Mcleod |
| B. | Pirani |
| C. | Thermocouple |
| D. | None of these |
| Answer» B. Pirani | |
| 109. |
Presence of a small amount of water in the organic systems can be determined by the _____________ method? |
| A. | Electrical conductivity |
| B. | Polarimetry |
| C. | Emission spectroscopy |
| D. | Dielectric constant end loss factor |
| Answer» E. | |
| 110. |
Positioning controllers are used for _______________? |
| A. | Low loads |
| B. | Temperature changes |
| C. | High loads |
| D. | Flow rate changes |
| Answer» D. Flow rate changes | |
| 111. |
Polarograph is meant for the analysis of __________________? |
| A. | Gaseous mixture |
| B. | Miscible liquids |
| C. | Solids |
| D. | Isotopes |
| Answer» D. Isotopes | |
| 112. |
Polarisation of light forms the working principle of a______________? |
| A. | Polarimeter |
| B. | Polarograph |
| C. | Chromatograph |
| D. | Spectrometer |
| Answer» B. Polarograph | |
| 113. |
Platinum resistance thermometer can be used upto antimony point which is ____________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure? |
| A. | 961.93 |
| B. | 630.74 |
| C. | 1064.43 |
| D. | 1261.93 |
| Answer» C. 1064.43 | |
| 114. |
Platinum resistance thermometer is the international standard for temperature measurement between __________________? |
| A. | Triple point of hydrogen and freezing point of antimony |
| B. | 13.81°K to 903.9°K |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 115. |
Pirani gauge is used for the measurement of________________? |
| A. | Very high pressure |
| B. | High vacuum |
| C. | Liquid level under pressure |
| D. | Liquid level at atmospheric pressure |
| Answer» C. Liquid level under pressure | |
| 116. |
Pick out the one which is a first order instrument ? |
| A. | Mercury in glass thermometer (without any covering or air gap) |
| B. | Bare metallic thermometer |
| C. | Bare vapor pressure thermometer |
| D. | All A., B. and C. |
| Answer» E. | |
| 117. |
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C ? |
| A. | Mercury thermometer |
| B. | Bimetallic thermometer |
| C. | Radiation pyrometer |
| D. | None of these |
| Answer» C. Radiation pyrometer | |
| 118. |
Pick out the first order system from among the following ? |
| A. | Damped vibrator |
| B. | Mercury in glass thermometer kept in boiling water |
| C. | Interacting system of two tanks in series |
| D. | Non-interacting system of two tanks in series |
| Answer» C. Interacting system of two tanks in series | |
| 119. |
Photoelectric pyrometers are suitable in the temperature range of ________________ °C? |
| A. | 400-1600 |
| B. | 800-1600 |
| C. | 800-2500 |
| D. | 400-1000 |
| Answer» C. 800-2500 | |
| 120. |
Phase lag of the sinusoidal response of a first order system is _________________? |
| A. | 120° |
| B. | 30° |
| C. | 180° |
| D. | 90° |
| Answer» E. | |
| 121. |
Phase margin is equal to_______________? |
| A. | 180° – phase lag |
| B. | Phase lag – 180° |
| C. | Phase lag + 180° |
| D. | Phase lag + 90° |
| Answer» B. Phase lag – 180° | |
| 122. |
Phase lag of the frequency response of a second order system to a sinusoidal forcing function______________? |
| A. | Is 30° |
| B. | Is 90° at the most |
| C. | Approaches 180° asymptotically |
| D. | Is 120° |
| Answer» D. Is 120° | |
| 123. |
pH meter has ____________________? |
| A. | One cell |
| B. | Two cells |
| C. | Three cells |
| D. | No cell |
| Answer» C. Three cells | |
| 124. |
Paramagnetism method is not used for the composition determination of ______________ in gases? |
| A. | Oxygen |
| B. | Oxides of nitrogen |
| C. | Carbon dioxide |
| D. | Any of these |
| Answer» D. Any of these | |
| 125. |
Out of the following thermocouple wire insulating material, the highest temperature rating is for________________? |
| A. | Teflon |
| B. | Ceramic fibre |
| C. | Asbestos |
| D. | Fibre glass |
| Answer» C. Asbestos | |
| 126. |
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the ________________? |
| A. | Mercury in glass thermometer |
| B. | Optical pyrometer |
| C. | Iron-constantan thermocouple |
| D. | Alcohol filled thermometer |
| Answer» C. Iron-constantan thermocouple | |
| 127. |
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury? |
| A. | 250 |
| B. | 350 |
| C. | 550 |
| D. | 700 |
| Answer» D. 700 | |
| 128. |
Optical activity of a solution can be determined using a ___________________? |
| A. | Polarimeter |
| B. | Polarograph |
| C. | Dilatometer |
| D. | Refractometer |
| Answer» B. Polarograph | |
| 129. |
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an _____________ pyrometer? |
| A. | Radiation |
| B. | Optical |
| C. | Photoelectric |
| D. | None of these |
| Answer» D. None of these | |
| 130. |
On-off controllers are normally used for________________? |
| A. | Low loads |
| B. | Temperature changes |
| C. | Flow rate changes |
| D. | None of these |
| Answer» B. Temperature changes | |
| 131. |
On-off control which is a special case of proportional control, has a band width of about _____________ percent? |
| A. | 100 |
| B. | 75 |
| C. | 25 |
| D. | 0 |
| Answer» E. | |
| 132. |
Number of poles in a system with transfer function 1/(s2 + 2s2 + 1) is ________________? |
| A. | 2 |
| B. | 5 |
| C. | 3 |
| D. | 1 |
| Answer» D. 1 | |
| 133. |
Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by__________________? |
| A. | Filling nitrogen under pressure in the stem |
| B. | Increasing the diameter of the tube |
| C. | Using steel tube in place of glass tube |
| D. | Accounting for the tube expansion |
| Answer» B. Increasing the diameter of the tube | |
| 134. |
Non-metallic diaphragm used as pressure sensor in instruments is generally made of__________________? |
| A. | Teflon |
| B. | Synthetic rubber |
| C. | Bakelite |
| D. | Thick paper |
| Answer» C. Bakelite | |
| 135. |
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C? |
| A. | 0-100 |
| B. | < 0 |
| C. | > 100 |
| D. | > 50 |
| Answer» D. > 50 | |
| 136. |
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is __________________? |
| A. | 12 |
| B. | 36 |
| C. | 54 |
| D. | 68 |
| Answer» C. 54 | |
| 137. |
Nichol’s chart deals with __________________? |
| A. | A.R. vs. phase lag of first order |
| B. | A.R. vs. phase lag of second order |
| C. | Closed loop values vs. open loop values |
| D. | Frequency response values of controllers |
| Answer» D. Frequency response values of controllers | |
| 138. |
Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a________________? |
| A. | Beckman thermometer |
| B. | Dilatometer |
| C. | Mercury thermometer |
| D. | Bimetallic thermometer |
| Answer» B. Dilatometer | |
| 139. |
Mercury thermometer can be used to measure the temperature upto ____________ °C? |
| A. | 100 |
| B. | 250 |
| C. | 350 |
| D. | 750 |
| Answer» D. 750 | |
| 140. |
Mercury thermometer is commonly used for low temperature measurement. The freezing point and boiling point of mercury are respectively _____________ °C? |
| A. | – 39 and 350 |
| B. | – 51 and 439 |
| C. | – 79 and 395 |
| D. | – 10 and 425 |
| Answer» B. – 51 and 439 | |
| 141. |
Mercury manometer (U-tube type) exemplifies a ______________ order system? |
| A. | Zero |
| B. | First |
| C. | Second |
| D. | Third |
| Answer» D. Third | |
| 142. |
Measurement of sub-zero Celsius temperature in industry is done most commonly by __________________? |
| A. | Thermocouples |
| B. | Resistance thermometers |
| C. | Gas thermometers |
| D. | Bi-metallic thermometers |
| Answer» C. Gas thermometers | |
| 143. |
Measurement of pressure in ammonia reactor is done by __________________? |
| A. | Bourdon gauge |
| B. | U-tube manometer |
| C. | Inclined tube manometer |
| D. | Pirani gauge |
| Answer» B. U-tube manometer | |
| 144. |
Mcleod gauge measures the _____________ pressure? |
| A. | Positive |
| B. | Sub-atmospheric |
| C. | Very high |
| D. | Atmospheric |
| Answer» C. Very high | |
| 145. |
Mcleod gauge is used to measure the __________________? |
| A. | Point velocity |
| B. | Flow rate |
| C. | Vacuum |
| D. | Pressure |
| Answer» D. Pressure | |
| 146. |
Maximum differential pressure in liquid manometer is ______________ psi? |
| A. | 20 |
| B. | 30 |
| C. | 40 |
| D. | 50 |
| Answer» C. 40 | |
| 147. |
Mass spectrometer is used for the composition analysis of____________________? |
| A. | Alloys |
| B. | Solids |
| C. | Isotopes |
| D. | None of these |
| Answer» D. None of these | |
| 148. |
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their ? |
| A. | Low thermal conductivity |
| B. | Low electrical conductivity |
| C. | High viscosity index |
| D. | Low flash point |
| Answer» C. High viscosity index | |
| 149. |
Load cells are used for the measurement of __________________? |
| A. | Stress |
| B. | Weight |
| C. | Strain |
| D. | Velocity |
| Answer» C. Strain | |
| 150. |
Liquid levels in autoclaves are measured by ________________? |
| A. | Simple float |
| B. | Differential float type manometer |
| C. | Glass gauge |
| D. | None of these |
| Answer» C. Glass gauge | |