MCQOPTIONS
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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.
| 201. |
Dome temperature of blast furnace stove is most accurately measured by a____________________? |
| A. | Radiation pyrometer |
| B. | platinum-platinum/rhodium thermocouple |
| C. | Iron-constantan thermocouple |
| D. | Platinum resistance thermometer |
| Answer» C. Iron-constantan thermocouple | |
| 202. |
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First empirical temperature scale developed was the _____________ scale? |
| A. | Kelvin |
| B. | Centigrade |
| C. | Fahrenheit |
| D. | Reaumer |
| Answer» D. Reaumer | |
| 203. |
Dilatometer is used to measure __________________? |
| A. | Stress |
| B. | Strain |
| C. | Deflection |
| D. | Contraction/expansion due to changes in temperature |
| Answer» E. | |
| 204. |
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its ___________________? |
| A. | Speed of response |
| B. | Reproducibility |
| C. | Fidelity |
| D. | Static characteristics |
| Answer» D. Static characteristics | |
| 205. |
Dead zone is the__________________? |
| A. | Same as time constant |
| B. | Same as transportation lag |
| C. | Maximum change in the variable that does not change the reading of the instrument |
| D. | None of these |
| Answer» D. None of these | |
| 206. |
Conversion formula for converting amplitude ratio (AR) into decibels is ________________? |
| A. | Decibel = 20 log10 (AR) |
| B. | Decibel = 20 loge (AR) |
| C. | Decibel = 20 log10 (AR)0.5 |
| D. | Decibel = 20 loge (AR)0.5 |
| Answer» B. Decibel = 20 loge (AR) | |
| 207. |
______________ controller has the maximum stabilising time? |
| A. | P |
| B. | PD |
| C. | PI |
| D. | PID |
| Answer» D. PID | |
| 208. |
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a __________________? |
| A. | Thermocouple |
| B. | Resistance thermometer |
| C. | Mercury in glass thermometer |
| D. | Vapor pressure thermometer |
| Answer» B. Resistance thermometer | |
| 209. |
Continuous measurement of specific gravity of a liquid is done by __________________? |
| A. | Hydrometer |
| B. | Contact-type electric indicators |
| C. | Displacement meter |
| D. | Both A. and C. |
| Answer» E. | |
| 210. |
Continuous measurement of moisture in paper is done by_______________? |
| A. | Sling psychrometer |
| B. | Hair-hygrometer |
| C. | Weighing |
| D. | High resistance Wheatstone bridge circuit |
| Answer» E. | |
| 211. |
Continuous measurement of moisture content of paper in paper industry is done by measuring the_________________? |
| A. | Thermal conductivity through the paper |
| B. | Electrical resistance through the paper |
| C. | Magnetic susceptibility |
| D. | None of these |
| Answer» C. Magnetic susceptibility | |
| 212. |
Configuration of Bourdon spring tube is never made of _____________ shape? |
| A. | Circular |
| B. | Semi-circular |
| C. | Helical |
| D. | Spiral |
| Answer» B. Semi-circular | |
| 213. |
Concentration of sugar solution can be determined by the__________________? |
| A. | Polarimetry |
| B. | Flame photometry |
| C. | Emission spectroscopy |
| D. | Oscillometry |
| Answer» B. Flame photometry | |
| 214. |
Compositional analysis of ______________ is done using mass spectrometer? |
| A. | An isotope |
| B. | Natural gas |
| C. | A solid |
| D. | An alloy |
| Answer» B. Natural gas | |
| 215. |
Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an___________________? |
| A. | Orsat apparatus |
| B. | Thermal conductivity cell |
| C. | Zirconia probe |
| D. | Chromatograph |
| Answer» C. Zirconia probe | |
| 216. |
Composition of natural gas is determined by the_________________? |
| A. | Haldane apparatus |
| B. | Mass spectrometer |
| C. | Chromatograph |
| D. | Both B. and C. |
| Answer» E. | |
| 217. |
Composition of alloys can be determined by _________________? |
| A. | Polarograph |
| B. | Chromatograph |
| C. | Refractometer |
| D. | None of these |
| Answer» B. Chromatograph | |
| 218. |
Characteristic equation is the denominator of ____________ loop transfer function? |
| A. | Open |
| B. | Closed |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. and B. | |
| 219. |
Change of angle of refraction with composition comprises the working principle of a___________________? |
| A. | Polarimeter |
| B. | Polarograph |
| C. | Spectrometer |
| D. | Refractometer |
| Answer» E. | |
| 220. |
Cascade control means _______________? |
| A. | Feed forward control |
| B. | More than one feed-back loop |
| C. | On-off control |
| D. | One feed-back loop |
| Answer» C. On-off control | |
| 221. |
Bourdon tube is never made of________________? |
| A. | Phosphor bronze |
| B. | Monel metal |
| C. | Stainless steel |
| D. | Cast iron |
| Answer» E. | |
| 222. |
Bourdon gauges are used for measuring pressure (kg/cm2) ? |
| A. | < atmospheric |
| B. | > 2 (gauge) |
| C. | 10 (absolute) |
| Answer» C. 10 (absolute) | |
| 223. |
Bode stability method uses ____________ loop transfer function? |
| A. | Open |
| B. | Closed |
| C. | Either A. or B. |
| D. | Neither A. nor B. |
| Answer» B. Closed | |
| 224. |
Bode diagram are generated from output response of the system subjected to which of the following input ? |
| A. | Impulse |
| B. | Step |
| C. | Ramp |
| D. | Sinusoidal |
| Answer» E. | |
| 225. |
Bimetal strips are not used in________________? |
| A. | Bimetallic thermometers |
| B. | Thermocouples |
| C. | Thermostats |
| D. | Relays for opening & closing of electrical circuits |
| Answer» C. Thermostats | |
| 226. |
____________ are analysed using a Polarograph? |
| A. | Isotonic solutions |
| B. | Solids |
| C. | Liquids |
| D. | Gases |
| Answer» C. Liquids | |
| 227. |
An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________________? |
| A. | 0.5/0.2 |
| B. | 0.2/0.5 |
| C. | 0.2 × 0.5 |
| D. | 1/√(0.2 × 0.5) |
| Answer» E. | |
| 228. |
An aneroid barometer measures the _____________ pressure? |
| A. | Atmospheric |
| B. | Absolute |
| C. | Vacuum |
| D. | Gage |
| Answer» C. Vacuum | |
| 229. |
An amplitude ratio of 0.1 corresponds to _____________ decibels? |
| A. | 20 |
| B. | -20 |
| C. | 10 |
| D. | -10 |
| Answer» C. 10 | |
| 230. |
All the thermocouples used for temperature measurement use dissimilar metal ________________? |
| A. | Strips |
| B. | Bars |
| C. | Wires |
| D. | Beads |
| Answer» D. Beads | |
| 231. |
Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ? |
| A. | Enhancement or attenuation of radiation occurs in the sighting path |
| B. | Object and surrounding are at almost the same temperature |
| C. | Object has varying emissivity |
| D. | Object is transparent |
| Answer» C. Object has varying emissivity | |
| 232. |
According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________? |
| A. | 0° |
| B. | 45° |
| C. | 90° |
| D. | 180° |
| Answer» E. | |
| 233. |
A typical example of a physical system with under damped characteristic is a____________________? |
| A. | U-tube manometer |
| B. | Spring loaded diaphragm valve |
| C. | CSTR with first order reaction |
| D. | Thermocouple kept immersed in a liquid filled thermowell |
| Answer» C. CSTR with first order reaction | |
| 234. |
A system with transfer function [(2S/4S) + 1] is of _____________ order? |
| A. | Zero |
| B. | 1st |
| C. | 2nd |
| D. | 3rd |
| Answer» C. 2nd | |
| 235. |
A system with a double pole at the origin is unstable since the corresponding term in the time domain________________? |
| A. | Is a constant |
| B. | Grows exponentially with time |
| C. | Grows linearly with time |
| D. | Decays linearly with time |
| Answer» D. Decays linearly with time | |
| 236. |
A stable system is the one___________________? |
| A. | For which the output response is bounded for all bounded input |
| B. | Which exhibits an unbounded response to a bounded input |
| C. | Which satisfies the conditions for a servo problem |
| D. | None of these |
| Answer» B. Which exhibits an unbounded response to a bounded input | |
| 237. |
A sinusoidal variation in the input passing through a linear first order system _________________? |
| A. | Becomes more oscillatory (frequency increases) |
| B. | Becomes less oscillatory (frequency decreases) |
| C. | Gets amplified (magnitude increases) |
| D. | Gets attenuated (magnitude decreases) |
| Answer» E. | |
| 238. |
A simple pitot tube measures the___________________? |
| A. | Average velocity |
| B. | Maximum velocity |
| C. | Point velocity |
| D. | Static pressure |
| Answer» E. | |
| 239. |
A pyrheliometer is an instrument used for measuring the_________________? |
| A. | Bright sunshine period |
| B. | Beam radiation |
| C. | Diffuse radiation |
| D. | None of these |
| Answer» C. Diffuse radiation | |
| 240. |
A pyranometer is an instrument used for measuring the___________________? |
| A. | Beam radiation |
| B. | Global radiation |
| C. | Bright sunshine period |
| D. | None of these |
| Answer» C. Bright sunshine period | |
| 241. |
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if________________? |
| A. | Kc is reduced |
| B. | Kc is increased |
| C. | Integral control action is introduced |
| D. | Derivative control action is introduced |
| Answer» C. Integral control action is introduced | |
| 242. |
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in_______________? |
| A. | Light intensity |
| B. | Current |
| C. | Flux density |
| D. | Voltage |
| Answer» B. Current | |
| 243. |
A non-linear system will have _____________ steady state values? |
| A. | One |
| B. | More than one |
| C. | Two |
| D. | Three |
| Answer» C. Two | |
| 244. |
A non-linear chemical system is exemplified by a/an_________________? |
| A. | Isothermal CSTR |
| B. | Mixer |
| C. | Non-isothermal CSTR |
| D. | None of these |
| Answer» D. None of these | |
| 245. |
A negative gain margin expressed in decibels means a/an ____________ system? |
| A. | Stable |
| B. | Unstable |
| C. | Critically damped |
| D. | None of these |
| Answer» C. Critically damped | |
| 246. |
A mercury thermometer cannot be used to measure the temperature below the freezing point of mercury, which is _____________ °C? |
| A. | -38.9 |
| B. | -11.9 |
| C. | -60.9 |
| D. | -80.9 |
| Answer» B. -11.9 | |
| 247. |
A mercury barometer measures the _____________ pressure? |
| A. | Atmospheric |
| B. | Gauge |
| C. | Vacuum |
| D. | Absolute |
| Answer» B. Gauge | |
| 248. |
A manometer measures the _____________ pressure? |
| A. | Atmospheric |
| B. | Absolute |
| C. | Gauge |
| D. | None of these |
| Answer» D. None of these | |
| 249. |
A magnetic flowmeter is_________________? |
| A. | Based on the principle of Faraday’s law |
| B. | Capable of measuring the flow rate of slurries and electrolytes |
| C. | Based on the linear relationship between the fluid flow rate and the induced voltage |
| D. | All A., B. and C. |
| Answer» E. | |
| 250. |
A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________? |
| A. | 0 |
| B. | 0.5 |
| C. | 1/√2 |
| D. | 0.25 |
| Answer» D. 0.25 | |