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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.
| 1351. |
Express the vector in the Cartesian Form, if the angle made by it with y and z axis is 60˚ and 45˚ respectively. Also, it makes an angle of α with the x-axis. The magnitude of the force is 200N. |
| A. | 100i + 100j + 141.4k N |
| B. | 100i – 100j + 141.4k N |
| C. | 100i + 100j – 141.4k N |
| D. | 100i – 100j – 141.4k N |
| Answer» B. 100i – 100j + 141.4k N | |
| 1352. |
How is a normal to a tangent drawn? |
| A. | Angle bisector |
| B. | Perpendicular bisector |
| C. | Rectangle |
| D. | Semicircle |
| Answer» C. Rectangle | |
| 1353. |
To draw a tangent to an arc of unknown radius and centre through any point on the arc we use ________ |
| A. | Angle bisectors |
| B. | Semicircles |
| C. | Arc |
| D. | Perpendicular bisector |
| Answer» E. | |
| 1354. |
In the following figure, how will make a tangent from the point outside the circle? |
| A. | By drawing a semicircle with diameter as OA |
| B. | By drawing a perpendicular bisector |
| C. | By drawing an angle bisector |
| D. | By drawing circle with the same radius from A |
| Answer» B. By drawing a perpendicular bisector | |
| 1355. |
In the following figure, the tangent at point A can be drawn by _______ |
| A. | Angle bisector |
| B. | Perpendicular bisector |
| C. | Rectangle |
| D. | Arc |
| Answer» C. Rectangle | |
| 1356. |
A tangent to a circle is a line which touches the circle at one and only one point. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1357. |
While using Gauss Jordan’s method, after all the elementary row operations if there are zeroes left on the main diagonal, then which of the following is correct? |
| A. | System may have unique solution |
| B. | System has no solution |
| C. | System may have multiple numbers of finite solutions |
| D. | System may have infinitely many solutions |
| Answer» E. | |
| 1358. |
Apply Gauss Jordan method to solve the following equations. |
| A. | x = 7, y = 2, z = 5 |
| B. | x = 7, y = 2, z = 8 |
| C. | x = 1, y = 3, z = 5 |
| D. | x = 5, y = 3, z = 6View Answer |
| Answer» D. x = 5, y = 3, z = 6View Answer | |
| 1359. |
In solving simultaneous equations by Gauss Jordan method, the coefficient matrix is reduced to ______ matrix. |
| A. | Identity |
| B. | Diagonal |
| C. | Upper triangular |
| D. | Lower triangular |
| Answer» C. Upper triangular | |
| 1360. |
Why Gauss Elimination is preferred over other methods? |
| A. | Less number of operations are involved |
| B. | Back substitution needed |
| C. | Elimination of unknowns |
| D. | Forms diagonal matrix form |
| Answer» B. Back substitution needed | |
| 1361. |
The advantage of using Gauss Jordan method is which of the following? |
| A. | More operations involved |
| B. | Elimination is easier |
| C. | Additional Calculations |
| D. | No labour of back substitution |
| Answer» E. | |
| 1362. |
Which of the following is not a step involved in Gauss Jordan Method? |
| A. | Elimination of unknowns |
| B. | Reduction of systems to diagonal matrix form |
| C. | Performing elimination on equations above as well as below |
| D. | Evaluation of cofactors |
| Answer» E. | |
| 1363. |
The modification of Gauss elimination method is called as ___________ |
| A. | Gauss Seidal |
| B. | Gauss Jordan |
| C. | Jacobi’s Method |
| D. | Relaxation Method |
| Answer» C. Jacobi’s Method | |
| 1364. |
The structure of interface plays a key role in determining its energy. Which among the energy considerations play a major role when their sizes are large and small respectively? |
| A. | Interfacial and elastic |
| B. | Elastic and interfacial |
| C. | Interfacial in both cases |
| D. | Elastic in both cases |
| Answer» C. Interfacial in both cases | |
| 1365. |
Generic high angle grain boundaries are typically___________ |
| A. | Coherent interface |
| B. | Semi coherent interface |
| C. | Incoherent interface |
| D. | Mixed interface |
| Answer» D. Mixed interface | |
| 1366. |
If the surface area of the large particle remains unchanged the increase in free energy will be due to the____ |
| A. | Motion of spherical particle |
| B. | Vibration of spherical particle |
| C. | Increase in the interfacial area of the spherical particle |
| D. | Decrease in the interfacial area of the spherical particle |
| Answer» D. Decrease in the interfacial area of the spherical particle | |
| 1367. |
The free energy increase due to interfacial energy is known as_____ |
| A. | Gibbs-Thomson effect |
| B. | Perkins effect |
| C. | Nano effect |
| D. | Hauls effect |
| Answer» B. Perkins effect | |
| 1368. |
MnS in steel is an example of _____ |
| A. | Coherent interface |
| B. | Semi coherent interface |
| C. | Incoherent interface |
| D. | Mixed interface |
| Answer» D. Mixed interface | |
| 1369. |
There is an increase in free energy due to interfacial energy is known as a capillarity effect or the Gibbs-Thomson effect. Find the increase in this free energy if the interfacial energy, the molar volume and the radius of the spherical particle are given as 10 (kJ/mm2), 6mm3/mol and 4mm respectively? |
| A. | 40 kJmol-1 |
| B. | 30 kJmol-1 |
| C. | 50 kJmol-1 |
| D. | 60 kJmol-1 |
| Answer» C. 50 kJmol-1 | |
| 1370. |
If the α/β(α,β are phases) interfacial energy is given as 10N/mm and the particles are spherical with a radius 2.5mm, ΔP (extra pressure due to curvature of α/β) is given approximately by_________ |
| A. | 8 N/mm2 |
| B. | 4 N/mm2 |
| C. | 3 N/mm2 |
| D. | 2 N/mm2 |
| Answer» B. 4 N/mm2 | |
| 1371. |
For a particular or given diffusion coefficient, which among the following interface moves the slowest? |
| A. | Coherent |
| B. | Semi coherent |
| C. | Incoherent |
| D. | Mixed |
| Answer» B. Semi coherent | |
| 1372. |
Solidification front is an example of_________ |
| A. | Solid-Vapor interface |
| B. | Solid-Liquid interface |
| C. | Solid-Solid interface |
| D. | Liquid-Liquid interface |
| Answer» C. Solid-Solid interface | |
| 1373. |
Grain boundaries are an example of a_________ |
| A. | Solid-Vapor interface |
| B. | Solid-Liquid interface |
| C. | Solid-Solid interface |
| D. | Liquid-Liquid interface |
| Answer» D. Liquid-Liquid interface | |
| 1374. |
The surface of a single crystal (of a pure element) is an example of a_________ |
| A. | Solid-Vapor interface |
| B. | Solid-Liquid interface |
| C. | Solid-Solid interface |
| D. | Liquid-Liquid interface |
| Answer» B. Solid-Liquid interface | |
| 1375. |
Determine the corrections or otherwise of the following assertion [A] and reason [R]:Assertion [A]: In general, wing twist should not be more than 6°.Reason[R]: Wing twist is used to improve stall properties at tip. |
| A. | Both [A] and [R] are true and [R] is the correct reason for [A] |
| B. | Both [A] and [R] are true but [R] is not the correct reason for [A] |
| C. | [A] is true but [R] is false |
| D. | [A] is false but [R] is true |
| Answer» C. [A] is true but [R] is false | |
| 1376. |
Excessive dihedral can produce _____ |
| A. | dutch roll |
| B. | thrust |
| C. | pitch |
| D. | deflection at nose |
| Answer» B. thrust | |
| 1377. |
What is the function of wing twist? |
| A. | To improve stall characteristics at tip |
| B. | To reduce lift by tail |
| C. | To provide lofting |
| D. | To increase engine thrust |
| Answer» B. To reduce lift by tail | |
| 1378. |
If root chord is 2m and tip chord is 0.9m then, find taper ratio. |
| A. | 0.45 |
| B. | 0.55 |
| C. | 0.65 |
| D. | 0.25 |
| Answer» B. 0.55 | |
| 1379. |
The ratio of tip and root chord is called ____ |
| A. | taper ratio |
| B. | sweep |
| C. | aspect ratio |
| D. | slope |
| Answer» B. sweep | |
| 1380. |
Canard pusher aircraft uses wing sweep to change location of aerodynamic centre. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1381. |
Wing sweep is used to ____ |
| A. | increase critical mach number |
| B. | decrease critical mach number |
| C. | increase lofting |
| D. | increase drafting |
| Answer» B. decrease critical mach number | |
| 1382. |
An aircraft with elliptic wing planform has parasite drag coefficient as 0.9. Lift coefficient of wing is 1.8 and aspect ratio is 8.5. Find total drag coefficient for the wing. |
| A. | 1.021 |
| B. | 0.9 |
| C. | 0.121 |
| D. | 0.25 |
| Answer» B. 0.9 | |
| 1383. |
An aircraft with elliptic wing planform has parasite drag coefficient as 0.6. Lift coefficient of wing is 0.25 and aspect ratio is 7.5. If induced drag co-efficient is 0.0235 then, find total drag coefficient for the wing. |
| A. | 0.06235 |
| B. | 0.5235 |
| C. | 0.6 |
| D. | 0.0235 |
| Answer» B. 0.5235 | |
| 1384. |
Let’s consider an aircraft has statistically determined aspect ratio of 8.1. Aircraft has canard which gives contribution of 10% for total lift. Determine the aspect ratio of wing. |
| A. | 9 |
| B. | 0.9 |
| C. | 10 |
| D. | 8.1 |
| Answer» B. 0.9 | |
| 1385. |
Which of the following is correct in accordance to diagram? |
| A. | Aspect ratio of 1 is highest |
| B. | Aspect ratio of 2 is maximum |
| C. | Aspect ratio of 3 is maximum |
| D. | Similar aspect ratio |
| Answer» B. Aspect ratio of 2 is maximum | |
| 1386. |
If aspect ratio of wing is 8 and S=0.1m2 then, what will be the span of wing? |
| A. | 0.89m |
| B. | 0.89cm |
| C. | 0.89 |
| D. | 0.89inch |
| Answer» B. 0.89cm | |
| 1387. |
For high aspect ratio strength of the wing tip vortex is low. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1388. |
The peripheral ring beam is prestressed by which type of wire winding? |
| A. | Circular |
| B. | Trapezoidal |
| C. | Elliptical |
| D. | Curved |
| Answer» C. Elliptical | |
| 1389. |
The spherical domes are supported by a ring beam at the __________ |
| A. | Base |
| B. | Middle |
| C. | Start |
| D. | Edge |
| Answer» B. Middle | |
| 1390. |
The folded plate is also analyzed for __________ |
| A. | Longitudinal |
| B. | Transverse |
| C. | Straight |
| D. | Reverse |
| Answer» C. Straight | |
| 1391. |
Fold plates are widely used for __________ |
| A. | Roofs |
| B. | Beams |
| C. | Stress |
| D. | Foundation |
| Answer» B. Beams | |
| 1392. |
The hyperbolic parabolic shells, grouped under the category of __________ |
| A. | Singly curved shells |
| B. | Doubly curved shells |
| C. | Three curved shells |
| D. | Four curved shells |
| Answer» C. Three curved shells | |
| 1393. |
The general bending theory of thin curved shells is governed by a __________ |
| A. | Differential equation |
| B. | Parabola equation |
| C. | Ellipse equation |
| D. | Moment equations |
| Answer» B. Parabola equation | |
| 1394. |
The rigorous methods generally involve computations to estimate the __________ |
| A. | Transverse reactions |
| B. | Longitudinal reactions |
| C. | Redundant reactions |
| D. | Span reactions |
| Answer» D. Span reactions | |
| 1395. |
The analysis of circular cylindrical shells with prestressed edge beam is more or less similar to __________ |
| A. | Prestressed concrete beam |
| B. | Reinforced concrete beam |
| C. | Chemically prestressed beam |
| D. | Partially prestressed beam |
| Answer» C. Chemically prestressed beam | |
| 1396. |
In general, concrete shells have thin cross sections, which prectude the use of large diameter? |
| A. | Cables |
| B. | Wires |
| C. | Bars |
| D. | Lens |
| Answer» B. Wires | |
| 1397. |
The compressive state of stress in the shell membrane results in which construction? |
| A. | Airtight construction |
| B. | Water tight construction |
| C. | Lever construction |
| D. | Soffit construction |
| Answer» C. Lever construction | |
| 1398. |
The investigations by Marshall have shown that prestressing considerably reduces __________ |
| A. | Sagging moment |
| B. | Transverse moment |
| C. | Hogging moment |
| D. | Longitudinal moment |
| Answer» C. Hogging moment | |
| 1399. |
The parabolic profile of the cables in the edge beam counteracts the __________ |
| A. | Compression |
| B. | Tension |
| C. | Deflection |
| D. | Deformation |
| Answer» D. Deformation | |
| 1400. |
Long spans exceeding 30m necessitate is? |
| A. | Welding |
| B. | Blocking |
| C. | Anchoring |
| D. | Spinning |
| Answer» B. Blocking | |