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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.
201. |
What is the undesirable product in urea production? |
A. | Ammonium carbonate |
B. | Biuret formation |
C. | Liquid NH3 |
D. | Flakes formation |
Answer» C. Liquid NH3 | |
202. |
Which process is associated with urea production? |
A. | High pressure stripping operation |
B. | Low temperature stripping operation |
C. | Low pressure stripping operation |
D. | Low temperature stripping operation |
Answer» D. Low temperature stripping operation | |
203. |
What is the highest end use of urea? |
A. | solid fertilizer |
B. | liquid fertilizer |
C. | formaldehyde resin |
D. | melamine |
Answer» B. liquid fertilizer | |
204. |
Choose the statement which defines the Nullable type Correctly:a) A special version of a value type that is represented by a structureb) A nullable type can also store the value nullc) Nullable types are objects of System.Nullable, where T must be a non nullable value typed) All of the mentioned Answer: dExplanation: A nullable type is a special version of the value type that is represented by a structure. In addition to the values defined by the underlying type, a nullable type can also store the value null. Thus, a nullable type has the same range and characteristics as its underlying type. It simply adds the ability to represent a value which indicates that a variable of that type is unassigned. Nullable types are objects of System.Nullable
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A. | A special version of a value type that is represented by a structureb) A nullable type can also store the value nullc) Nullable types are objects of System.Nullable, where T must be a non nullable value typed) All of the mentioned Answer: dExplanation: A nullable type is a special version of the value type that is represented by a structure. In addition to the values defined by the underlying type, a nullable type can also store the value null. Thus, a nullable type has the same range and characteristics as its underlying type. It simply adds the ability to represent a value which indicates that a variable of that type is unassigned. Nullable types are objects of System.Nullable<T>, where T must be a nonnullable value type.7. What does the following code depicts? i. System.Nullable count;_x000D_ ii. bool? done;a) Code i declares the objects of nullable of type Nullable<T> defined in the System namespaceb) Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’c) Both Code i declares the objects of nullable of type Nullable<T> defined in the System namespace & Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’d) None of the mentioned Answer: cExplanation: None.8. Which operator is commonly used to find the size of the type of C#?a) size()b) sizeof(type)c) both size() & sizeof(type)d) none of the mentioned Answer: bExplanation: None.9. What will be the output of the following C# code snippet? unsafe struct FixedBankRecord { public fixed byte Name[80]; public double Balance; public long ID; } class UnsafeCode { unsafe static void Main() { Console.WriteLine("Size of FixedBankRecord is " + sizeof(FixedBankRecord)); Console.ReadLine(); } }a) Run time error |
B. | A nullable type can also store the value nullc) Nullable types are objects of System.Nullable, where T must be a non nullable value typed) All of the mentioned Answer: dExplanation: A nullable type is a special version of the value type that is represented by a structure. In addition to the values defined by the underlying type, a nullable type can also store the value null. Thus, a nullable type has the same range and characteristics as its underlying type. It simply adds the ability to represent a value which indicates that a variable of that type is unassigned. Nullable types are objects of System.Nullable<T>, where T must be a nonnullable value type.7. What does the following code depicts? i. System.Nullable count;_x000D_ ii. bool? done;a) Code i declares the objects of nullable of type Nullable<T> defined in the System namespaceb) Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’c) Both Code i declares the objects of nullable of type Nullable<T> defined in the System namespace & Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’d) None of the mentioned Answer: cExplanation: None.8. Which operator is commonly used to find the size of the type of C#?a) size()b) sizeof(type)c) both size() & sizeof(type)d) none of the mentioned Answer: bExplanation: None.9. What will be the output of the following C# code snippet? unsafe struct FixedBankRecord { public fixed byte Name[80]; public double Balance; public long ID; } class UnsafeCode { unsafe static void Main() { Console.WriteLine("Size of FixedBankRecord is " + sizeof(FixedBankRecord)); Console.ReadLine(); } }a) Run time errorb) 80 |
C. | Nullable types are objects of System.Nullable, where T must be a non nullable value typed) All of the mentioned Answer: dExplanation: A nullable type is a special version of the value type that is represented by a structure. In addition to the values defined by the underlying type, a nullable type can also store the value null. Thus, a nullable type has the same range and characteristics as its underlying type. It simply adds the ability to represent a value which indicates that a variable of that type is unassigned. Nullable types are objects of System.Nullable<T>, where T must be a nonnullable value type.7. What does the following code depicts? i. System.Nullable count;_x000D_ ii. bool? done;a) Code i declares the objects of nullable of type Nullable<T> defined in the System namespaceb) Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’c) Both Code i declares the objects of nullable of type Nullable<T> defined in the System namespace & Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’d) None of the mentioned Answer: cExplanation: None.8. Which operator is commonly used to find the size of the type of C#?a) size()b) sizeof(type)c) both size() & sizeof(type)d) none of the mentioned Answer: bExplanation: None.9. What will be the output of the following C# code snippet? unsafe struct FixedBankRecord { public fixed byte Name[80]; public double Balance; public long ID; } class UnsafeCode { unsafe static void Main() { Console.WriteLine("Size of FixedBankRecord is " + sizeof(FixedBankRecord)); Console.ReadLine(); } }a) Run time errorb) 80c) 96 |
D. | All of the mentioned Answer: dExplanation: A nullable type is a special version of the value type that is represented by a structure. In addition to the values defined by the underlying type, a nullable type can also store the value null. Thus, a nullable type has the same range and characteristics as its underlying type. It simply adds the ability to represent a value which indicates that a variable of that type is unassigned. Nullable types are objects of System.Nullable<T>, where T must be a nonnullable value type.7. What does the following code depicts? i. System.Nullable count;_x000D_ ii. bool? done;a) Code i declares the objects of nullable of type Nullable<T> defined in the System namespaceb) Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’c) Both Code i declares the objects of nullable of type Nullable<T> defined in the System namespace & Code ii declares a nullable type in much shorter and in more commonly used way using ‘?’d) None of the mentioned Answer: cExplanation: None.8. Which operator is commonly used to find the size of the type of C#?a) size()b) sizeof(type)c) both size() & sizeof(typ |
E. | both size() & sizeof(type)d) none of the mentioned Answer: bExplanation: None.9. What will be the output of the following C# code snippet? unsafe struct FixedBankRecord { public fixed byte Name[80]; public double Balance; public long ID; } class UnsafeCode { unsafe static void Main() { Console.WriteLine("Size of FixedBankRecord is " + sizeof(FixedBankRecord)); Console.ReadLine(); } }a) Run time errorb) 80c) 96d) Compile time error Answer: cExplanation: The purpose of a fixed-size buffer is to allow the creation of a struct in which the array of elements that make up the buffer are contained within the struct. By using a fixed-size buffer, we let the entire array to be contained within the struct. The overall size of FixedBankRecord is 96, which is the sum of its members.Output : |
Answer» E. both size() & sizeof(type)d) none of the mentioned Answer: bExplanation: None.9. What will be the output of the following C# code snippet? unsafe struct FixedBankRecord { public fixed byte Name[80]; public double Balance; public long ID; } class UnsafeCode { unsafe static void Main() { Console.WriteLine("Size of FixedBankRecord is " + sizeof(FixedBankRecord)); Console.ReadLine(); } }a) Run time errorb) 80c) 96d) Compile time error Answer: cExplanation: The purpose of a fixed-size buffer is to allow the creation of a struct in which the array of elements that make up the buffer are contained within the struct. By using a fixed-size buffer, we let the entire array to be contained within the struct. The overall size of FixedBankRecord is 96, which is the sum of its members.Output : | |
205. |
The axial length of 16 coils = axial length of each coil * 16. |
A. | true |
B. | false |
Answer» B. false | |
206. |
What is the range for the current density at HT side for a distribution transformer? |
A. | 2.4-3.5 Amp per mm2 |
B. | 2-2.5 Amp per mm2 |
C. | 1-3.5 Amp per mm2 |
D. | 2-3.5 Amp per mm2 |
Answer» C. 1-3.5 Amp per mm2 | |
207. |
What is the assumption for width of the largest stamping for the stepped core transformer? |
A. | 0.9*d |
B. | 0.71*d |
C. | 0.85*d |
D. | 0.8*d |
Answer» B. 0.71*d | |
208. |
What is the formula for the inside diameter of the low voltage windings? |
A. | inside diameter = diameter of the circumscribing circle + pressboard thickness insulation between l.v winding and core |
B. | inside diameter = diameter of the circumscribing circle – pressboard thickness insulation between l.v winding and core |
C. | inside diameter = diameter of the circumscribing circle + 2*pressboard thickness insulation between l.v winding and core |
D. | inside diameter = diameter of the circumscribing circle – 2* pressboard thickness insulation between l.v winding and core |
Answer» D. inside diameter = diameter of the circumscribing circle – 2* pressboard thickness insulation between l.v winding and core | |
209. |
What is the formula to calculate the radial depth of low voltage windings? |
A. | radial depth of the lv windings = number of layers * radial depth of the conductors * insulation between layers |
B. | radial depth of the lv windings = number of layers * radial depth of the conductors – insulation between layers |
C. | radial depth of the lv windings = number of layers / radial depth of the conductors + insulation between layers |
D. | radial depth of the lv windings = number of layers * radial depth of the conductors + insulation between layers |
Answer» E. | |
210. |
What is the formula for the window clearance of the transformer? |
A. | window clearance = (height of the window + axial depth)/2 |
B. | window clearance = (height of the window – axial depth) |
C. | window clearance = (height of the window – axial depth)/2 |
D. | window clearance = (height of the window + axial depth) |
Answer» D. window clearance = (height of the window + axial depth) | |
211. |
What is the formula for the height and width of the single phase shell transformer? |
A. | width = 2*width of the window + 4*width of the largest stamping, height = height of the window + 2*width of the largest stamping |
B. | width = 2*width of the window – 4*width of the largest stamping, height = height of the window + 2*width of the largest stamping |
C. | width = 2*width of the window + 4*width of the largest stamping, height = height of the window – 2*width of the largest stamping |
D. | width = 2*width of the window – 4*width of the largest stamping, height = height of the window -2*width of the largest stamping |
Answer» B. width = 2*width of the window – 4*width of the largest stamping, height = height of the window + 2*width of the largest stamping | |
212. |
What is the formula for the depth and height of the yoke for stepped core?a) depth = width of largest stamping, height = 2* width of largest stampingb) depth = 2*width of largest stamping, height = width of largest stampingc) depth = width of largest stamping, height = width of largest stampingd) depth = 2*width of largest stamping, height = 2* width of largest stamping 2.The height and the width of the single phase and three phase core type transformers are equal. |
A. | depth = width of largest stamping, height = 2* width of largest stampingb) depth = 2*width of largest stamping, height = width of largest stampingc) depth = width of largest stamping, height = width of largest stampingd) depth = 2*width of largest stamping, height = 2* width of largest stamping 2.The height and the width of the single phase and three phase core type transformers are equal.a) true |
B. | depth = 2*width of largest stamping, height = width of largest stamping |
C. | depth = width of largest stamping, height = width of largest stamping |
D. | depth = 2*width of largest stamping, height = 2* width of largest stamping 2.The height and the width of the single phase and three phase core type transformers are equal.a) trueb) falseView Answer |
Answer» D. depth = 2*width of largest stamping, height = 2* width of largest stamping 2.The height and the width of the single phase and three phase core type transformers are equal.a) trueb) falseView Answer | |
213. |
Choose the CSS property which specifies the placement of a table caption. |
A. | table-caption |
B. | cell-caption |
C. | caption-side |
D. | caption-adjust |
Answer» D. caption-adjust | |
214. |
Which of the following property aligns the flexible container’s items when the items do not use all available space on the main-axis? |
A. | wrap-content |
B. | fix-content |
C. | adjust-content |
D. | justify-content |
Answer» E. | |
215. |
Which of the following CSS property sets the opacity level for an element? |
A. | opacity |
B. | transparency |
C. | transparent |
D. | all of the mentioned |
Answer» B. transparency | |
216. |
_________________ binders are used for large dry sand cores. |
A. | Sulfate Binders |
B. | Pitch |
C. | Dextrin |
D. | Gelatinalized Starch |
Answer» B. Pitch | |
217. |
What will be the shape of Rankine oval when sin θ=0? |
A. | vertical line |
B. | horizontal line |
C. | a point |
D. | curve |
Answer» C. a point | |
218. |
A combination of uniform flow and doublet flow gives ______________ |
A. | flow past a circular cylinder |
B. | flow past a wedge |
C. | flow past a plate |
D. | flow over any body |
Answer» B. flow past a wedge | |
219. |
K’I are determined at |
A. | Top section Temperatures |
B. | Bottom section Temperatures |
C. | Middle section Temperatures |
D. | Right section Temperatures |
Answer» C. Middle section Temperatures | |
220. |
Ki are determined at the |
A. | Top section Temperatures |
B. | Bottom section Temperatures |
C. | Middle section Temperatures |
D. | Right section Temperatures |
Answer» B. Bottom section Temperatures | |
221. |
If the feed temperature is 2110K and Bubble point is 70oF, then tm is |
A. | 68oF |
B. | 178oF |
C. | 140.5oF |
D. | 259.5oF |
Answer» E. | |
222. |
If the feed temperature is 211oK and Dew point is 70oF, then tn is |
A. | 68oF |
B. | 178oF |
C. | 140.5oF |
D. | 259.5oF |
Answer» D. 259.5oF | |
223. |
Brinkley Method can be used for,i) Distillationii) Leachingiii) Absorption |
A. | True |
B. | False |
Answer» B. False | |
224. |
Choose the incorrect statement with respect to the use of FD in half-wave circuits. |
A. | Input pf is improved |
B. | Load current waveform is improved |
C. | It prevents the load voltage from becoming negative |
D. | Reduces the reverse voltage (PIV) faced by the SCR |
Answer» E. | |
225. |
A single phase half-wave controlled rectifier has 400 sin314t as the input voltage and R as the load. For a firing angle of 60°,the average output voltage is |
A. | 200/π |
B. | 300/π |
C. | 100/π |
D. | 400/π |
Answer» C. 100/π | |
226. |
A single-phase HW rectifier with a FD is supplied by Vs = 240 V, 50 Hz, AC with a load R = 10 Ω, L = 0.5 mH and a firing angle α = 30°. Find the average value of the load current. |
A. | 10 A |
B. | 0.063 A |
C. | 6.3 A |
D. | 0.1 A |
Answer» B. 0.063 A | |
227. |
A single-phase half wave rectifier with a FD is supplied by Vs = 240 V, AC with a load R = 10 Ω, L = 0.5 mH and a firing angle α = 30°. Find the average value of the load voltage. |
A. | 50 V |
B. | 100 V |
C. | 150 V |
D. | 200 V |
Answer» C. 150 V | |
228. |
The output voltage waveform of the below given circuit would be the same that obtained from a |
A. | full-wave R load circuit |
B. | half-wave R load circuit |
C. | half-wave RL load circuit |
D. | full-wave RL load with freewheeling diode |
Answer» C. half-wave RL load circuit | |
229. |
In the below given circuit, when the commutating diode or FD is conducting than the |
A. | SCR has reverse bias voltage and the load current is zero |
B. | SCR has reverse bias voltage and the load current is positive |
C. | SCR has forward bias voltage and the load current is zero |
D. | SCR has forward bias voltage and the load current is positive |
Answer» C. SCR has forward bias voltage and the load current is zero | |
230. |
In the below given circuit, the FD (Freewheeling diode) is forward biased at ωt = |
A. | 0 |
B. | α |
C. | π |
D. | 2π |
E. | is forward biased at ωt =a) 0b) αc) πd) 2π |
Answer» D. 2π | |
231. |
The simple elbow draft tube is placed close to the_______ |
A. | Head race |
B. | Tail race |
C. | Tank |
D. | Nozzle |
Answer» C. Tank | |
232. |
The main difference between reaction turbine and outward radial flow reaction turbine is water flows __________ |
A. | Radial direction |
B. | Radially inward |
C. | Radially outward |
D. | Axial direction |
Answer» C. Radially outward | |
233. |
In outward radial flow reaction turbine if thickness is considered then discharge is ____________ |
A. | (P1-n*t)*b1*Vf1 |
B. | (P2-n*t)*b2*Vf2 |
C. | (P1-n*t)*b2*Vf2 |
D. | Both (P1-n*t)*b1*Vf1 & (P2-n*t)*b2*Vf2 |
Answer» E. | |
234. |
In outward radial flow reaction turbine if angle made by absolute velocity with its tangent is 90 degrees and component of whirl is zero at inlet is _______________ |
A. | Radial inlet discharge |
B. | Radial outlet discharge |
C. | Flow ratio |
D. | Speed ratio |
Answer» B. Radial outlet discharge | |
235. |
In outward flow reaction turbine tangential velocity at inlet is always__________than outlet velocity. |
A. | Equal |
B. | Less |
C. | More |
D. | Constant |
Answer» C. More | |
236. |
Outward flow reaction turbine will quite suitable for_____________ |
A. | High head |
B. | Medium head |
C. | Low head |
D. | Static head |
Answer» C. Low head | |
237. |
The outward radial flow reaction turbine is a turbine in which direction of water flow is ___________ |
A. | Radial direction |
B. | Radially inward |
C. | Radially outward |
D. | Axial direction |
Answer» D. Axial direction | |
238. |
The coefficient of permeability by Packer for length in the range 10r > L ≥r test is given by ________ |
A. | \(k=\frac{q}{2πh}log_{10} \frac{L}{r} \) |
B. | \(k=\frac{q}{2πLh}log_{10} \frac{L}{r} \) |
C. | \(k=\frac{q}{2Lh}log_{10} \frac{L}{r} \) |
D. | \(k=\frac{q}{2πLh}sinh^{-1}\frac{L}{2r} \) |
Answer» E. | |
239. |
The coefficient of permeability by Packer for length greater than ten times the radius test is given by ________ |
A. | \(k=\frac{q}{2πh}log_{10} \frac{L}{r}\) |
B. | \(k=\frac{v}{2πLh}log_{10} \frac{L}{r}\) |
C. | \(k=\frac{q}{2Lh}log_{10} \frac{L}{r}\) |
D. | \(k=\frac{q}{2πLh}log_{10} \frac{L}{r}\) |
Answer» B. \(k=\frac{v}{2πLh}log_{10} \frac{L}{r}\) | |
240. |
The formula for the open-end test is given by _________ |
A. | \(k=\frac{q}{5.5rh} \) |
B. | \(k=\frac{5.5rh}{q} \) |
C. | \(k=\frac{q}{5rh} \) |
D. | \(k=\frac{q}{0.5rh} \) |
Answer» B. \(k=\frac{5.5rh}{q} \) | |
241. |
The U.S. Bureau of Reclamation (Earth manual 1960) has devised two types of pumping-in tests _________ |
A. | open-end test and packer test |
B. | permeability test and radio test |
C. | dupin test and influence test |
D. | falling head and constant head permeability test |
Answer» B. permeability test and radio test | |
242. |
In the field determination, pumping must continue at a ________ |
A. | uniform rate for sufficient time to approach steady state |
B. | non- uniform rate for sufficient time to approach steady state |
C. | uniform rate until just before time to approach steady state |
D. | non-uniform rate until just before time to approach steady state |
Answer» B. non- uniform rate for sufficient time to approach steady state | |
243. |
The permeability of the aquifer is ________ if the drawdown is 4m, discharge is 40litres/sec, thickness of confined aquifer is 30m and the radius of the well is 0.1m. The radius of influence is taken as 245m. |
A. | 36 m/day |
B. | 30 m/day |
C. | 26 m/day |
D. | 20 m/day |
Answer» B. 30 m/day | |
244. |
The formula for the pumping out test in an unconfined aquifer is given by _________ |
A. | \(k=\frac{qπ}{1.36(H^2-h^2)}log_{10}\frac{R}{r} \) |
B. | \(k=\frac{q}{1.36(H^2-h^2)}log_{10}\frac{R}{r} \) |
C. | \(k=\frac{q}{π(H^2-h^2)}log_{10}\frac{R}{r} \) |
D. | \(k=\frac{q}{1.36(H^2-h^2)} \) |
Answer» C. \(k=\frac{q}{π(H^2-h^2)}log_{10}\frac{R}{r} \) | |
245. |
The method in which it uses the alphabet for dimensioning is called as ________ |
A. | vertical dimensioning |
B. | tabular dimensioning |
C. | combined dimensioning |
D. | horizontal dimensioning |
Answer» C. combined dimensioning | |
246. |
The method in which it uses the same reference or datum which is used by another dimensioning method is called __________ |
A. | vertical dimensioning |
B. | inclined dimensioning |
C. | combined dimensioning |
D. | horizontal dimensioning |
Answer» D. horizontal dimensioning | |
247. |
The dimension which is measured with the help of the reference line is called _________ |
A. | parallel dimensioning |
B. | superimposed running dimensioning |
C. | combined dimensioning |
D. | tabular dimensioning |
Answer» B. superimposed running dimensioning | |
248. |
The method which starts with a circle is called as ___________ |
A. | parallel dimensioning |
B. | superimposed running dimensioning |
C. | combined dimensioning |
D. | tabular dimensioning |
Answer» C. combined dimensioning | |
249. |
The method in which the series of dimensions are applied from one point to other is called _________ |
A. | Parallel dimension |
B. | Chain dimensioning |
C. | Combined dimensioning |
D. | Tabular dimensioning |
Answer» C. Combined dimensioning | |
250. |
In dimensioning a 2D sketch, to dimension the radius of the arc ________ |
A. | click on the two end points of arc |
B. | click on the arc only |
C. | click one of the end point and the arc |
D. | click on the center point and arc |
Answer» C. click one of the end point and the arc | |