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MCQOPTIONS
This section includes 5314 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 2151. |
With SQL, how do you select all the records from a table named “Persons” where the value of the column “FirstName” ends with an “a”? |
| A. | SELECT * FROM Persons WHERE FirstName=’a’ |
| B. | SELECT * FROM Persons WHERE FirstName LIKE ‘a%’ |
| C. | SELECT * FROM Persons WHERE FirstName LIKE ‘%a’ |
| D. | SELECT * FROM Persons WHERE FirstName=’%a%’ |
| Answer» D. SELECT * FROM Persons WHERE FirstName=’%a%’ | |
| 2152. |
What does DML stand for? |
| A. | Different Mode Level |
| B. | Data Model Language |
| C. | Data Mode Lane |
| D. | Data Manipulation language |
| Answer» E. | |
| 2153. |
Mark the correct equation for Respiratory quotient? |
| A. | RQ = O2 produced/Co2 consumed |
| B. | RQ = Co2 produced/ O2 consumed |
| C. | RQ = H2O produced/ Co2 consumed |
| D. | RQ = H2O produced/ O2 consumed |
| Answer» C. RQ = H2O produced/ Co2 consumed | |
| 2154. |
What is the Warburg effect? |
| A. | Shows increased glycolysis in Cancer cell |
| B. | Disease caused by pesticide |
| C. | Blockage of ATP synthesis |
| D. | Inhibitor of glycolysis |
| Answer» B. Disease caused by pesticide | |
| 2155. |
Which of the following is CORRECT for the Pasteur Effect? |
| A. | Utilization of glucose for fermentation |
| B. | Increased glucose consumption by yeast in anaerobic condition |
| C. | Fermentation favors aerobic condition more than anaerobic |
| D. | Increased consumption of glucose by yeast in aerobic condition |
| Answer» C. Fermentation favors aerobic condition more than anaerobic | |
| 2156. |
What is Respirasome? |
| A. | The supramolecular complex of complex I, II, and III |
| B. | Respiratory center of the body |
| C. | Complex III and IV of the electron transport chain |
| D. | The intermediate complex formed during oxidative phosphorylation |
| Answer» B. Respiratory center of the body | |
| 2157. |
What is the value of x(n)*h(n), 0≤n≤11 for the sequences x(n)={1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} and h(n)={1,1,1} if we perform using overlap save fast convolution technique? |
| A. | {1,3,3,-1,1,3,5,2,-2,2,3,6} |
| B. | {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} |
| C. | {1,2,0,3,4,2,1,1,2,3,2,1,3} |
| D. | {1,3,3,1,1,3,5,2,2,2,3,6} |
| Answer» B. {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} | |
| 2158. |
What is the value of x(n)*h(n), 0≤n≤11 for the sequences x(n)={1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} and h(n)={1,1,1} if we perform using overlap add fast convolution technique? |
| A. | {1,3,3,1,1,3,5,2,2,2,3,6} |
| B. | {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} |
| C. | {1,2,0,3,4,2,1,1,2,3,2,1,3} |
| D. | {1,3,3,-1,1,3,5,2,-2,2,3,6} |
| Answer» E. | |
| 2159. |
In which of the following methods, the output sequence is considered as shown in the below diagram? |
| A. | Overlap save method |
| B. | Overlap add method |
| C. | Overlap add & save method |
| D. | None of the mentioned |
| Answer» C. Overlap add & save method | |
| 2160. |
In which of the following methods, the input sequence is considered as shown in the below diagram? |
| A. | Overlap save method |
| B. | Overlap add method |
| C. | Overlap add & save method |
| D. | None of the mentioned |
| Answer» B. Overlap add method | |
| 2161. |
What is the sequence y(n) that results from the use of four point DFTs if the impulse response is h(n)={1,2,3} and the input sequence x(n)={1,2,2,1}? |
| A. | {9,9,7,11} |
| B. | {1,4,9,11,8,3} |
| C. | {7,9,7,11} |
| D. | {9,7,9,11} |
| Answer» E. | |
| 2162. |
By means of the DFT and IDFT, determine the response of the FIR filter with impulse response h(n)={1,2,3} to the input sequence x(n)={1,2,2,1}? |
| A. | {1,4,11,9,8,3} |
| B. | {1,4,9,11,8,3} |
| C. | {1,4,9,11,3,8} |
| D. | {1,4,9,3,8,11} |
| Answer» C. {1,4,9,11,3,8} | |
| 2163. |
Coefficient of discharge is directly proportional to mass flow rate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2164. |
Coefficient of discharge is inversely proportional to square root of _______ |
| A. | flow resistance |
| B. | pressure drop inside the nozzle |
| C. | none the mentioned |
| D. | flow resistance & pressure drop inside the nozzle |
| Answer» E. | |
| 2165. |
Coefficient of discharge (Cd) can be written as Cd=1/K(0.5). |
| A. | True |
| B. | False |
| C. | |
| Answer» B. False | |
| 2166. |
Using lasers, large aspect ratio in drilling can be achieved. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2167. |
Which of the following does not hold true about laser beam machining? |
| A. | High initial cost |
| B. | High running cost |
| C. | No heat affected zone |
| D. | It is not suitable for heat sensitive materials |
| Answer» D. It is not suitable for heat sensitive materials | |
| 2168. |
For which of the following materials CO2 laser is not used? |
| A. | Plastics |
| B. | Metals |
| C. | Organic materials |
| D. | Ceramics |
| Answer» C. Organic materials | |
| 2169. |
CO2 lasers are folded to achieve _____________ |
| A. | high power |
| B. | high depth of cuts |
| C. | high material removal rate |
| D. | avoid over heating |
| Answer» B. high depth of cuts | |
| 2170. |
In CO2 laser, ‘He’ gas is used for cooling purpose. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2171. |
In a CO2 laser, a mixture of _____ is circulated through the gas tube. |
| A. | CO2, N2 and He |
| B. | CO2, N2 and Ar |
| C. | CO2, H2 and N2 |
| D. | CO2, I2 and O2 |
| Answer» B. CO2, N2 and Ar | |
| 2172. |
The power of CO2 laser is around______ |
| A. | 15 Watt per meter of tube length |
| B. | 55 Watt per meter of tube length |
| C. | 100 Watt per meter of tube length |
| D. | 1 MW per meter of tube length |
| Answer» D. 1 MW per meter of tube length | |
| 2173. |
The flash tube is operated in _____ mode. |
| A. | pulsed |
| B. | continuous |
| C. | reversed |
| D. | synchronous |
| Answer» B. continuous | |
| 2174. |
Which of the following CVD technique is a flame based technique? |
| A. | CCVD |
| B. | PECVD |
| C. | LPCVD |
| D. | ALCVD |
| Answer» B. PECVD | |
| 2175. |
Which film is used for improving barrier properties of PET bottles? |
| A. | PVC |
| B. | PED |
| C. | DLC |
| D. | GLC |
| Answer» D. GLC | |
| 2176. |
In Plasma Enhanced Chemical Vapor Deposition, deposition occurs at a _______ temperature. |
| A. | Higher |
| B. | Constant |
| C. | Increasing |
| D. | Lower |
| Answer» E. | |
| 2177. |
_____________ involves depositing successive layers of different substances to produce layered, crystalline films. |
| A. | Atomic layer chemical vapor deposition |
| B. | Combustion chemical vapor deposition |
| C. | Low pressure chemical vapor deposition |
| D. | Plasma enhanced chemical vapor deposition |
| Answer» B. Combustion chemical vapor deposition | |
| 2178. |
__________ is a PVD technique in which the bulk material is released into the vacuum by bombardment from an ion source. |
| A. | Splattering |
| B. | Sputtering |
| C. | Splashing |
| D. | Spreading |
| Answer» C. Splashing | |
| 2179. |
Adding more metal during the metallization process increases barrier properties. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2180. |
Energy of an electron is upto ______ in electron beam heating. |
| A. | 15eV |
| B. | 15keV |
| C. | 30eV |
| D. | 30keV |
| Answer» C. 30eV | |
| 2181. |
Which of the following is not a heating source in metallization? |
| A. | Convection heating |
| B. | Resistance heating |
| C. | Induction heating |
| D. | Electron beam heating |
| Answer» B. Resistance heating | |
| 2182. |
Which of the following metal is not used in vacuum metallization? |
| A. | Aluminium |
| B. | Nickel |
| C. | Chromium |
| D. | Sodium |
| Answer» E. | |
| 2183. |
A __________ is a highly concentrated blend of an additive and a carrier resin. |
| A. | Masterpolymer |
| B. | Mastermixture |
| C. | Masterbatch |
| D. | Masterblend |
| Answer» D. Masterblend | |
| 2184. |
Smart blending works on the principle of ________ |
| A. | Chaotic addition |
| B. | Chaotic advection |
| C. | Chaotic adversion |
| D. | Chaotic abstraction |
| Answer» C. Chaotic adversion | |
| 2185. |
How is the refrigerant used in the Air refrigeration cycle? |
| A. | In the condenser |
| B. | In the compressor |
| C. | Directly in contact |
| D. | Not used at all |
| Answer» D. Not used at all | |
| 2186. |
Reduction in operating pressure in the Air refrigeration cycle results in _________ |
| A. | increase in C.O.P. |
| B. | decrease in C.O.P. |
| C. | no change in C.O.P. |
| D. | always decreases |
| Answer» B. decrease in C.O.P. | |
| 2187. |
What is NOT one of the advantages of using closed Air Refrigeration system? |
| A. | Lighter in weight |
| B. | Compact in construction |
| C. | Environmental Friendly |
| D. | Lower co-efficient of performance |
| Answer» E. | |
| 2188. |
In a refrigerating machine, heat rejected is ________ the heat absorbed. |
| A. | equal to |
| B. | less than |
| C. | in unity with |
| D. | greater than |
| Answer» E. | |
| 2189. |
Why is fast freezing done in various products ? |
| A. | To reduce the cell damage due to ice crystal growth. |
| B. | To reduce energy consumption of refrigerator |
| C. | To reduce the bacterial activity |
| D. | To save time |
| Answer» B. To reduce energy consumption of refrigerator | |
| 2190. |
Which properties are essential for thermoelectric refrigeration? |
| A. | High electrical and thermal conductivity |
| B. | Low electrical and thermal conductivity |
| C. | Low electrical conductivity and high thermal conductivity |
| D. | High electrical conductivity and low thermal conductivity |
| Answer» E. | |
| 2191. |
Why is a nozzle used in a steam jet refrigeration system? |
| A. | To convert the high pressure motive steam into high velocity steam |
| B. | To reduce energy consumption |
| C. | To improve safety aspects |
| D. | To improve thermal conductivity |
| Answer» B. To reduce energy consumption | |
| 2192. |
What is the common application of Air standard refrigeration system? |
| A. | Domestic refrigerators |
| B. | Aircraft air conditioning |
| C. | Cold storage |
| D. | Car air conditioning system |
| Answer» C. Cold storage | |
| 2193. |
The rate constant and half life for reactions are related as ____ |
| A. | k α t0.5 |
| B. | k α \(\frac{1}{(t_{0.5})} \) |
| C. | k α e(-t0.5) |
| D. | k is independent of t0.5 |
| Answer» C. k α e(-t0.5) | |
| 2194. |
State true or false.The value of frequency factor affects the temperature sensitivity of reaction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2195. |
The unit of activation energy is ____ |
| A. | mol |
| B. | mol.K |
| C. | K |
| D. | J/ mol |
| Answer» E. | |
| 2196. |
State true or false.The Arrhenius law plot of lnk vs 1/ T gives a straight line with large slope for large activation energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2197. |
The reaction rate constant is related to reaction rate as ____a) k α (-rA)b) k α \(\frac{1}{(-r_A)} \) c) k α e(-rA)d) k is independent of (-r |
| A. | k α (-rA) |
| B. | k α \(\frac{1}{(-r_A)} \) |
| C. | k α e(-rA) |
| D. | k is independent of (-rA) |
| Answer» B. k α \(\frac{1}{(-r_A)} \) | |
| 2198. |
‘She compared me with her friend’- the statement is correct. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2199. |
Correct the incorrect statement: I’ve got nobody to talk. |
| A. | I’ve got nobody to talk to. |
| B. | I’ve got nobody to talk with. |
| C. | I’ve got nobody to talk from. |
| D. | I’ve got nobody to talk into. |
| Answer» B. I’ve got nobody to talk with. | |
| 2200. |
In the phrase, love for humanity, the preposition is related to possession. |
| A. | True |
| B. | False |
| Answer» C. | |