MCQOPTIONS
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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.
| 251. |
Increased asthmatic attacks in certain seasons are related to ________ |
| A. | Low temperatures |
| B. | Inhalation of seasonal pollens |
| C. | Eating fruits preserved in containers |
| D. | Hot and humid environment |
| Answer» C. Eating fruits preserved in containers | |
| 252. |
Ascent of high mountains may cause altitude sickness in men. Prime cause for this is _______ |
| A. | Decreased proportion of oxygen in the air |
| B. | Decreased partial pressure of oxygen |
| C. | Decreased efficiency of hemoglobin |
| D. | Excess CO2 in blood |
| Answer» C. Decreased efficiency of hemoglobin | |
| 253. |
Alveoli become enlarged and damaged with reduced surface area in heavy smokers. This condition is called ___________ |
| A. | Emphysema |
| B. | Silicosis |
| C. | Asthma |
| D. | Bronchitis |
| Answer» B. Silicosis | |
| 254. |
SARS is ________ |
| A. | An acute form of asthma |
| B. | Caused by variant of Corona virus |
| C. | Caused by a variant of Pneumococcus pneumoniae |
| D. | Affects non vegetarians faster |
| Answer» C. Caused by a variant of Pneumococcus pneumoniae | |
| 255. |
The primary stimulus for respiratory centre is ___________ |
| A. | Carbon dioxide and hydrogen ions |
| B. | Oxygen gas level in blood |
| C. | Oxygen gas level in hemoglobin |
| D. | Conscious feeling for need of oxygen |
| Answer» B. Oxygen gas level in blood | |
| 256. |
Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present at ____________ |
| A. | Pons |
| B. | Spinal cord |
| C. | Left hemisphere |
| D. | Thalamus |
| Answer» B. Spinal cord | |
| 257. |
Which operator can be used to free the memory allocated for an object in C++? |
| A. | Free() |
| B. | delete |
| C. | Unallocate |
| D. | Collect |
| Answer» C. Unallocate | |
| 258. |
In java ______________ takes care of managing memory for objects dynamically. |
| A. | Free collector |
| B. | Dust collector |
| C. | Memory manager |
| D. | Garbage collector |
| Answer» E. | |
| 259. |
If an object is declared in a user defined function __________________ |
| A. | Its memory is allocated in stack |
| B. | Its memory is allocated in heap |
| C. | Its memory is allocated in HDD |
| D. | Its memory is allocated in cache |
| Answer» B. Its memory is allocated in heap | |
| 260. |
The memory allocated for an object ____________________ |
| A. | Can be only dynamic |
| B. | Can be only static |
| C. | Can be static or dynamic |
| D. | Can’t be done using dynamic functions |
| Answer» D. Can’t be done using dynamic functions | |
| 261. |
Which operator can be used to check the size of an object? |
| A. | sizeof(objectName) |
| B. | size(objectName) |
| C. | sizeofobject(objectName) |
| D. | sizedobject(objectNam |
| E. | size(objectName)c) sizeofobject(objectName)d) sizedobject(objectName) |
| Answer» B. size(objectName) | |
| 262. |
Which function is called whenever an object goes out of scope? |
| A. | Destructor function |
| B. | Constructor function |
| C. | Delete function |
| D. | Free function |
| Answer» B. Constructor function | |
| 263. |
Which among the following keyword can be used to free the allocated memory for an object? |
| A. | delete |
| B. | free |
| C. | either delete or free |
| D. | only delete |
| Answer» D. only delete | |
| 264. |
When is the memory allocated for an object gets free? |
| A. | At termination of program |
| B. | When object goes out of scope |
| C. | When main function ends |
| D. | When system restarts |
| Answer» C. When main function ends | |
| 265. |
Which keyword among the following can be used to declare an array of objects in java? |
| A. | new |
| B. | create |
| C. | allocate |
| D. | arr |
| Answer» B. create | |
| 266. |
How much memory will be allocated for an object of class given below? |
| A. | 22 Bytes |
| B. | 24 Bytes |
| C. | 20 Bytes |
| D. | 18 BytesView Answer |
| Answer» B. 24 Bytes | |
| 267. |
Which of the following function can be used for dynamic memory allocation of objects? |
| A. | malloc() |
| B. | calloc() |
| C. | create() |
| D. | both malloc() and calloc() |
| Answer» E. | |
| 268. |
Using new is type safe as _______________________ |
| A. | It require to be specified with type of data |
| B. | It doesn’t require to be specified with type of data |
| C. | It requires the name of data |
| D. | It allocated memory for the data |
| Answer» C. It requires the name of data | |
| 269. |
When is the memory allocated for an object? |
| A. | At declaration of object |
| B. | At compile time |
| C. | When object constructor is called |
| D. | When object is initialized to another object |
| Answer» D. When object is initialized to another object | |
| 270. |
Where is the memory allocated for the objects? |
| A. | HDD |
| B. | Cache |
| C. | RAM |
| D. | ROM |
| Answer» D. ROM | |
| 271. |
What does memory allocation for objects mean? |
| A. | Actual creation and memory allocation for object members |
| B. | Creation of member functions |
| C. | Creation of data members for a class |
| D. | Actual creation and data declaration for object members |
| Answer» B. Creation of member functions | |
| 272. |
In convection from the tip what is the value of correction length? |
| A. | L C = A C/P |
| B. | L C = L + A C |
| C. | L C = L + P |
| D. | L C = L + A C/P |
| Answer» E. | |
| 273. |
Which one is true for the spine? |
| A. | A C = π d 2/4 and P = 4 π d |
| B. | A C = π d 2/4 and P = 3 π d |
| C. | A C = π d 2/4 and P = π d |
| D. | A C = π d 2/4 and P = 2 π d |
| Answer» D. A C = π d 2/4 and P = 2 π d | |
| 274. |
Find the value of corrected length for rectangular fin?Where, b is width and t is length of the fin |
| A. | L C = L + b t/2 (b + t) |
| B. | L C = L + b t/ (b + t) |
| C. | L C = L + 2 (b + t) |
| D. | L C = L + b t |
| Answer» B. L C = L + b t/ (b + t) | |
| 275. |
For steady flow of heat along a rod, the general equation isd2α/dx 2 – m 2 α = 0The value of constant m is |
| A. | (h P/k A C) |
| B. | (h P/k A C) 3/2 |
| C. | (h P/k A C) 1/2 |
| D. | (h P/k A C) 2 |
| Answer» D. (h P/k A C) 2 | |
| 276. |
A heating unit is made in the form of a vertical tube of 50 mm outside diameter and 1.2 m height. The tube is fitted with 20 steel fins of rectangular section with height 40 mm and thickness 2.5 mm. The temperature at the base of fin is 75 degree Celsius, the surrounding air temperature is 20 degree Celsius and the heat transfer coefficient between the fin as well as the tube surface and the surrounding air is 9.5 W/m2 K. If thermal conductivity of the fin material is 55 W/m K, find the amount of heat transferred from the tube without fin |
| A. | 98.44 W |
| B. | 88.44 W |
| C. | 78.44 W |
| D. | 68.44 W |
| Answer» B. 88.44 W | |
| 277. |
If heat conducted into the element at plane x is Q X = – k A C (d t/d x) X. Then heat conducted out of the element at plane (x + d x) is |
| A. | – 2k A C d/d x (t + d t/d x (d x)) |
| B. | – k A C d/d x (t + d t/d x (d x)) |
| C. | – 3k A C d/d x (t + d t/d x (d x)) |
| D. | – 4k A C d/d x (t + d t/d x (d x)) |
| Answer» C. – 3k A C d/d x (t + d t/d x (d x)) | |
| 278. |
Analysis of heat flow from the finned surface is made with the following assumptions(i) Uniform heat transfer coefficient, h over the entire fin surface(ii) No heat generation within the fin generation(iii) Homogenous materialIdentify the correct option |
| A. | i only |
| B. | i and ii only |
| C. | i, ii and iii |
| D. | ii only |
| Answer» D. ii only | |
| 279. |
Which one is true regarding rectangular fin? |
| A. | A C = b δ and P = 2(b + δ) |
| B. | A C = 2 b δ and P = 2(b + δ) |
| C. | A C = 3 b δ and P = 2(b + δ) |
| D. | A C = 4 b δ and P = 2(b + δ) |
| Answer» B. A C = 2 b δ and P = 2(b + δ) | |
| 280. |
If the dimensions of vectors don’t match, the plot command will always give an error. |
| A. | True |
| B. | False |
| Answer» C. | |
| 281. |
All matrices are vectors but all vectors are not matrices in MATLAB. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 282. |
The rectangular type of C.T. is built of _________ |
| A. | L shaped windings |
| B. | T shaped windings |
| C. | A shaped windings |
| D. | Z shaped windings |
| Answer» B. T shaped windings | |
| 283. |
The secondary winding of a C.T. is opened when? |
| A. | C.T. is magnetised |
| B. | C.T. is demagnetised |
| C. | C.T. is shorted |
| D. | C.T. is opened |
| Answer» C. C.T. is shorted | |
| 284. |
The secondary winding of a C.T. ____________ |
| A. | can be shorted |
| B. | can’t be shorted |
| C. | can be opened |
| D. | can’t be opened |
| Answer» B. can’t be shorted | |
| 285. |
High magnetizing forces in the core when removed suddenly lead to ____________ |
| A. | no residue |
| B. | partial residual magnetism |
| C. | rupture of the device |
| D. | residual magnetism |
| Answer» E. | |
| 286. |
The secondary circuit of a C.T. is open when? |
| A. | a very high flux density is produced |
| B. | a very low flux density is produced |
| C. | a moderate flux density is produced |
| D. | no flux density is produced |
| Answer» B. a very low flux density is produced | |
| 287. |
In a C.T., the primary ampere turns is variable. |
| A. | True |
| B. | False |
| Answer» C. | |
| 288. |
The first propagating mode on a grounded dielectric is: |
| A. | TMO mode |
| B. | TM1 mode |
| C. | TM2 mode |
| D. | TM3 mode |
| Answer» C. TM2 mode | |
| 289. |
What is the cutoff frequency of TE₁ mode of propagation if the relative permittivity of the slab is 3.2 and the thickness of the slab is 45 mm? |
| A. | 2.24 GHz |
| B. | 4 GHz |
| C. | 1.12 GHz |
| D. | 8 GHz |
| Answer» D. 8 GHz | |
| 290. |
Cutoff frequency fC for TEM mode of propagation is: |
| A. | Fc= (2n-1)c/4d√εr -1 |
| B. | Fc= (2n-c)/2d(√εr-1) |
| C. | /2d(√εr-1)c) Fc= (2n-1)/4d(√εr) |
| D. | Fc= (2n-1)/8d√εr – 1 |
| Answer» B. Fc= (2n-c)/2d(√εr-1) | |
| 291. |
In TE of propagation, HZ must obey the below equation for wave propagation in the region of presence of dielectric: |
| A. | (∂2/∂x2 + kc2) hZ(x,y)=0 |
| B. | (∂2/∂x2– h2)hZ(x,y)=0 |
| C. | (∂2/∂x2 – Kc2)hZ(x,y)=0 |
| D. | (∂2/∂x2 +h2)hZ(x,y)=0 |
| Answer» B. (∂2/∂x2– h2)hZ(x,y)=0 | |
| 292. |
The cutoff frequency in TM1 mode for the propagation of EM waves on dielectric slab of relative permittivity 2.6 and thickness 20 mm is: |
| A. | 6.5 GHz |
| B. | 5.92 GHz |
| C. | 4 GHz |
| D. | 2 GHz |
| Answer» C. 4 GHz | |
| 293. |
For surface waves on a dielectric sheet the cutoff frequency of the TM mode can be given as: |
| A. | fC = nC/2d√(ϵr-1) |
| B. | fC = C/2nd√(ϵr-1) |
| C. | fC = C/2nd√ϵr |
| D. | fC = 2C/nd√ϵr |
| Answer» B. fC = C/2nd√(ϵr-1) | |
| 294. |
For wave propagation on grounded dielectric sheet, the equation to be satisfied by Ez , in the region of presence of dielectric 0≤x≤d for the propagation to be in Z direction |
| A. | (∂2/∂x2 + ∈rk02– β2) eZ(x,y)=0 |
| B. | (∂2/∂x2 + k02– β2) eZ(x,y)=0 |
| C. | (∂2/∂x2 – k02+β2) eZ(x,y)=0 |
| D. | (∂2/∂x2 + ∈rk02) eZ(x,y)=0 |
| Answer» B. (∂2/∂x2 + k02– β2) eZ(x,y)=0 | |
| 295. |
Because of the presence of the dielectric, the phase velocity of a surface wave is: |
| A. | Greater than that in vacuum |
| B. | Lesser than that in vacuum |
| C. | Independent of the presence of dielectric |
| D. | Insufficient data |
| Answer» C. Independent of the presence of dielectric | |
| 296. |
Surface waves are typical by a field that decays ______away from the dielectric surface, with most of the field contained in or near the dielectric. |
| A. | Linearly |
| B. | Exponentially |
| C. | Cubical |
| D. | Field remains a constant |
| Answer» C. Cubical | |
| 297. |
What are feeding tubes made of? |
| A. | Bakelite |
| B. | Polyurethane |
| C. | Polyvinyl Chloride |
| D. | Poly ethene |
| Answer» C. Polyvinyl Chloride | |
| 298. |
What is the difference between the infusion pump and syringe pump? |
| A. | Syringe Pumps are used when a larger amount of medication has to be sent in while infusion pumps are used for smaller doses of medication |
| B. | Infusion pump injects into the abdomen and syringe pump injects in the blood vessels |
| C. | Infusion Pumps are used when a larger amount of medication has to be sent in while syringe pumps are used for smaller doses of medication |
| D. | Syringe pump injects into the abdomen and infusion pump injects in the blood vessels |
| Answer» D. Syringe pump injects into the abdomen and infusion pump injects in the blood vessels | |
| 299. |
Where are the access sites for the stomach wash tubes? |
| A. | Mouth |
| B. | Diaphragm |
| C. | Abdomen |
| D. | Anus |
| Answer» B. Diaphragm | |
| 300. |
We can use either cone type or horn type loudspeakers in tape recorders. |
| A. | True |
| B. | False |
| Answer» C. | |