Explore topic-wise MCQs in Chemical Engineering.

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, 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 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 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. 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.
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