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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.
| 1751. |
The derivative of digital function is defined in terms of difference. Then, which of the following defines the second order derivative ∂2 f/∂x2 = ___________ of a one-dimensional function f(x)? |
| A. | f(x+1)-f(x) |
| B. | f(x+1)+ f(x-1)-2f(x) |
| C. | All of the mentioned depending upon the time when partial derivative will be dealt along two spatial axes |
| D. | None of the mentioned |
| Answer» C. All of the mentioned depending upon the time when partial derivative will be dealt along two spatial axes | |
| 1752. |
The derivative of digital function is defined in terms of difference. Then, which of the following defines the first order derivative ∂f/∂x= ___________ of a one-dimensional function f(x)? |
| A. | f(x+1)-f(x) |
| B. | f(x+1)+ f(x-1)-2f(x) |
| C. | All of the mentioned depending upon the time when partial derivative will be dealt along two spatial axes |
| D. | None of the mentioned |
| Answer» B. f(x+1)+ f(x-1)-2f(x) | |
| 1753. |
Which of the facts(s) is/are true for the second order derivative of a digital function? |
| A. | Must be zero in the flat areas |
| B. | Must be nonzero at the onset and end of a gray-level step or ramp discontinuities |
| C. | Must be zero along the ramps of constant slope |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 1754. |
The objective of sharpening spatial filters is/are to ___________ |
| A. | Highlight fine detail in an image |
| B. | Enhance detail that has been blurred because of some error |
| C. | Enhance detail that has been blurred because of some natural effect of some method of image acquisition |
| D. | All of the mentioned |
| Answer» E. | |
| 1755. |
An SCR rectifier circuit is designed such that the average output voltage is 77.64 V & RMS value of output voltage is 145.873 V. Find the voltage ripple factor. |
| A. | 1.879 |
| B. | 0.532 |
| C. | 1.590 |
| D. | 0.629 |
| Answer» D. 0.629 | |
| 1756. |
Find the PIV of the SCR |
| A. | Vs |
| B. | 2Vs |
| C. | √2Vs |
| D. | Vs/2 |
| Answer» D. Vs/2 | |
| 1757. |
A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60° and output AC power of 2127 Watts, find the rectification efficiency |
| A. | 98.6 % |
| B. | 42 % |
| C. | 28 % |
| D. | 19 % |
| Answer» D. 19 % | |
| 1758. |
A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60°, find the average current in the bulb |
| A. | 2.5 A |
| B. | 7.7 A |
| C. | 9.6 A |
| D. | 3 A |
| Answer» C. 9.6 A | |
| 1759. |
A 230V, 50Hz, single-pulse SCR is feeding a RL load with α = 40° and β = 210°. Find the value of average output voltage |
| A. | 54 V |
| B. | 106 V |
| C. | 84 V |
| D. | 32 V |
| Answer» D. 32 V | |
| 1760. |
Choose the correct statement with respect to the below given circuit. |
| A. | The load current can never be zero |
| B. | The source current can never be zero |
| C. | The load voltage can never be zero |
| D. | All the given statements are false |
| Answer» D. All the given statements are false | |
| 1761. |
For the below shown circuit, a motor load (RLE) is connected to the SCR through supply Vs. The minimum value of the firing angle to turn on the SCR would be |
| A. | Sin-1(E/Vm) |
| B. | Sin-1(Vm/E) |
| C. | Cos-1(E/Vm) |
| D. | Cos-1(E/Vm) |
| Answer» B. Sin-1(Vm/E) | |
| 1762. |
A single-phase half-wave rectifier with a FD is supplied by Vs = 240 V, 50 Hz, AC source with a load R = 10 Ω, L = 0.8 mH. The firing angle is so adjusted such that the output voltage obtained is 100 V. Find the firing angle. |
| A. | 62° |
| B. | 102° |
| C. | 31° |
| D. | 47° |
| Answer» D. 47° | |
| 1763. |
_______ is an interactive program for generating sequence logos. |
| A. | EMBOSS |
| B. | WebLogo |
| C. | LOGOLY |
| D. | BLAST |
| Answer» C. LOGOLY | |
| 1764. |
Conserved positions have _____ residues and bigger symbols. |
| A. | fewer |
| B. | more |
| C. | maximum |
| D. | minimum |
| Answer» B. more | |
| 1765. |
The overall height of a logo position reflects how conserved the position is, and the _____ of each letter in a position reflects the _______ of the residue in the alignment. |
| A. | height, relative frequency |
| B. | width, relative frequency |
| C. | height, amplitude |
| D. | width, amplitude |
| Answer» B. width, relative frequency | |
| 1766. |
A multiple sequence alignment or a motif is often represented by a graphic representation called a ______ |
| A. | logo |
| B. | motto |
| C. | algorithm |
| D. | algo |
| Answer» B. motto | |
| 1767. |
Which of the following is true about Expectation Maximization (EM) method? |
| A. | The log odds scores of the PSSM are modified at the end of the process |
| B. | The procedure stops prematurely if the scores reach convergence |
| C. | The final result is not sensitive to the initial alignment |
| D. | Local optimum is an advantage of EM method |
| Answer» C. The final result is not sensitive to the initial alignment | |
| 1768. |
For what type of sequences Gibbs sampling is used? |
| A. | Closely related sequences |
| B. | Distinctly related sequences |
| C. | Distinctly related sequences that share common motifs |
| D. | Closely related sequences that share common motifs |
| Answer» D. Closely related sequences that share common motifs | |
| 1769. |
Cloud cover estimation is free from error. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1770. |
Reduction of error between simulated values and the true values increases accuracy of the empirical model. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1771. |
Why do ground-based observers overestimate overcast cloud cover? |
| A. | Clouds appear to fill large area of sky when near horizon |
| B. | Clouds appear to fill large area of sky when far from horizon |
| C. | Clouds appear to fill small area of sky when near horizon |
| D. | Clouds appear to fill small area of sky when far from horizon |
| Answer» B. Clouds appear to fill large area of sky when far from horizon | |
| 1772. |
Which of the following statistical indicator is used to evaluate any type of model? |
| A. | mean |
| B. | median |
| C. | error |
| D. | root mean square error |
| Answer» E. | |
| 1773. |
Which of the following is important during data acquisition from measuring instruments? Assume that details about data to be collected is known. |
| A. | Type of data |
| B. | Materials used to manufacture measuring instruments |
| C. | Location, environment and characteristics of measuring instrument |
| D. | Brand of measuring instruments |
| Answer» D. Brand of measuring instruments | |
| 1774. |
What does the ratio of global solar radiation (H) and estimated daily global radiation for cloudless sky (H0) indicate? |
| A. | Solar radiation transmission ratio |
| B. | Clearness index |
| C. | Solar radiation reflection percentage |
| D. | Turbidity |
| Answer» C. Solar radiation reflection percentage | |
| 1775. |
How is an empirical model developed? |
| A. | From data acquired via sensors or measuring instruments |
| B. | From theoretical analysis |
| C. | From deep learning |
| D. | From trial and error |
| Answer» B. From theoretical analysis | |
| 1776. |
Akinoglu and Fcevit uses a _______ to estimate solar radiation. |
| A. | linear model |
| B. | power model |
| C. | exponential model |
| D. | quadratic model |
| Answer» E. | |
| 1777. |
Which of the following models uses linear regression to estimate solar radiation from sunshine duration? |
| A. | Angstrom-Savinov |
| B. | Ertekin and Yladtz |
| C. | Anstrom-Prescott |
| D. | Sen |
| Answer» D. Sen | |
| 1778. |
How does the constant “k” in Angstrom-Savinov vary in high and low latitudes? |
| A. | Between 0.55 in high latitudes and 0.22 in low latitudes |
| B. | Between 0.55 in high latitudes and 0.33 in low latitudes |
| C. | Between 0.33 in high latitudes and 0.55 in low latitudes |
| D. | Between 0 in high latitudes and 0.9 in low latitudes |
| Answer» C. Between 0.33 in high latitudes and 0.55 in low latitudes | |
| 1779. |
The constant “k” in Angstrom-Savinov formula depends on ________ |
| A. | latitude of the location |
| B. | longitude of the location |
| C. | solar radiation |
| D. | cloud opacity |
| Answer» B. longitude of the location | |
| 1780. |
What does the constant “k” signify in the Angstrom-Savinov formula? |
| A. | Global solar radiation |
| B. | Mean cloudiness |
| C. | Reflection of solar radiation within clouds |
| D. | Transmission of solar radiation within clouds |
| Answer» E. | |
| 1781. |
Which does Angstrom-Savinov formula tell? |
| A. | Relationship between local solar radiation and global cloudiness |
| B. | Relationship between local solar radiation and local cloudiness |
| C. | Relationship between global solar radiation and mean cloudiness |
| D. | Relationship between global solar radiation and global cloudiness |
| Answer» D. Relationship between global solar radiation and global cloudiness | |
| 1782. |
Which of the following is a reason for inverse relationship between insolation and cloud cover in sky? |
| A. | Sunshine duration records are caused by sun being obstructed by transparent cloud cover |
| B. | Sunshine duration records are caused by sun being obstructed by opaque cloud cover |
| C. | Sunshine duration records are caused by sunshine being transmitted through opaque cloud cover |
| D. | Sunshine duration records are caused by sun being obstructed by cloud cover |
| Answer» C. Sunshine duration records are caused by sunshine being transmitted through opaque cloud cover | |
| 1783. |
What is the relationship between insolation and cloud cover in sky? |
| A. | Inverse |
| B. | Directly proportional |
| C. | Square |
| D. | Exponential |
| Answer» B. Directly proportional | |
| 1784. |
Which of the following statements are true about an m-shell n-tube Heat Exchanger? |
| A. | It has m+1 shell partitions and n+1 tube passes |
| B. | Temperature takes m-1 turns for shell and n-1 turns for tube |
| C. | Temperature takes m+1 turns for shell and n+1 turns for tube |
| D. | It has m-1 shell partitions and n-1 tube passes |
| Answer» C. Temperature takes m+1 turns for shell and n+1 turns for tube | |
| 1785. |
Recognize the below Multi-pass Heat exchanger. |
| A. | Cross flow |
| B. | Divided flow |
| C. | Split flow |
| D. | Double split flow |
| Answer» D. Double split flow | |
| 1786. |
Which of the following statements are correct about the below heat exchanger?NOTE: Cold fluid in tube and Hot fluid in the shell. |
| A. | The temperature of the fluid in the tube monotonically decreases |
| B. | The temperature of the fluid in the tube constantly increases |
| C. | The temperature of the fluid in the tube reaches a maximum and then decreases |
| D. | The temperature of the fluid in the tube reaches a maximum and then becomes constant |
| Answer» D. The temperature of the fluid in the tube reaches a maximum and then becomes constant | |
| 1787. |
In how many practical classes can we divide shell and tube HE based on the number of tube passes? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 1788. |
What is the name of the following setup? |
| A. | Cross flow |
| B. | Divided flow |
| C. | Split flow |
| D. | Double split flow |
| Answer» C. Split flow | |
| 1789. |
A double split shell and tube HE has two input and output flow passages respectively. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1790. |
Which one of the following does not belong to Shell and tube heat exchangers? |
| A. | Split Flow |
| B. | Parallel counter-flow |
| C. | Divided Flow |
| D. | Compound Flow |
| Answer» E. | |
| 1791. |
How many Heat Exchangers can be classified on the basis of flow passes of the fluids? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 1792. |
Which of the following is not a subset of Multipass Extended Surface Heat Exchangers? |
| A. | Cross Counter Flow |
| B. | Cross Parallel Flow |
| C. | Split Flow |
| D. | Compound Flow |
| Answer» D. Compound Flow | |
| 1793. |
Which one of the following does not belong to the classes of multipass heat exchangers? |
| A. | Compound flow extended surface |
| B. | Regenerative |
| C. | Split flow shell and tube |
| D. | Parallel counter-flow shell and tube |
| Answer» C. Split flow shell and tube | |
| 1794. |
Multipass Heat Exchangers classify heat exchangers on the basis of construction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1795. |
The key map size should not exceed __________ |
| A. | 20*22 cm |
| B. | 32*20 cm |
| C. | 32*32 cm |
| D. | 20*32 cm |
| Answer» B. 32*20 cm | |
| 1796. |
The surface thickness of the pavement is decided based on __________ |
| A. | HFL |
| B. | MFL |
| C. | MSL |
| D. | HFL and MSL |
| Answer» B. MFL | |
| 1797. |
What is the first step in a preliminary survey? |
| A. | Primary traverse |
| B. | Map study |
| C. | Detailed survey |
| D. | Detailed project report |
| Answer» B. Map study | |
| 1798. |
The intervals for levelling work in rolling terrain are taken as __________ |
| A. | 50m |
| B. | 30 m |
| C. | 45 m |
| D. | 40 m |
| Answer» B. 30 m | |
| 1799. |
Expand GPS? |
| A. | Global position satellite |
| B. | Global perception satellite |
| C. | Global position system |
| D. | Geographical position system |
| Answer» D. Geographical position system | |
| 1800. |
A closed loop used for survey purpose is called __________ |
| A. | Open traverse |
| B. | Closed traverse |
| C. | Primary traverse |
| D. | Secondary traverse |
| Answer» C. Primary traverse | |