MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Among the following, which feature is best suited for insulating materials? |
| A. | Low melting point |
| B. | Good current conductivity |
| C. | High dielectric strength |
| D. | Low mechanical strength |
| Answer» D. Low mechanical strength | |
| 2. |
For a system with a wavelength of 23.5 cm and a depression angle of sin-1 0.94, the surface relief below which the surface will appear smooth is determined as limited nearly to |
| A. | 2.8 cm |
| B. | 3.1 cm |
| C. | 3.5 cm |
| D. | 4.0 cm |
| Answer» C. 3.5 cm | |
| 3. |
Fully recoverable but time-dependent deformation is known as: |
| A. | elastic deformation |
| B. | an-elastic deformation |
| C. | viscoelastic deformation |
| D. | plastic deformation |
| Answer» C. viscoelastic deformation | |
| 4. |
In some substances when an electric field is applied the substance becomes polarized. The electrons and nuclei assume new geometrical positions and the mechanical dimensions are altered. This phenomenon is called: |
| A. | Electrostriction |
| B. | Hall-Effect |
| C. | Polarization |
| D. | Magnetization |
| Answer» B. Hall-Effect | |
| 5. |
Aluminium crystal structure is |
| A. | FCC |
| B. | BCC |
| C. | HCP |
| D. | None of these |
| Answer» B. BCC | |
| 6. |
Direction: It consists of two statements, one labelled as ‘Statement (I)’ and the others as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the codes given below:Statement (I): High strength, super-duralumin alloys are adopted in the manufacture of aero engines.Statement (II): Preciptation heat treatment is adopted for duralumin products. |
| A. | Both Statement (I) and Statement (II) individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both statement (I) and Statement (II) are individually true, but Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true, but Statement (II) is false |
| D. | Statement (I) is false, but Statement (II) is true |
| Answer» C. Statement (I) is true, but Statement (II) is false | |
| 7. |
In the case of ionic bonding, the molecule is stable as long as the number of bonding electrons is |
| A. | Equal to the number of antibonding electrons |
| B. | Less than the number of antibonding electrons |
| C. | Greater than the number of antibonding electrons |
| D. | Equal to the number of antibonding neutrons |
| Answer» D. Equal to the number of antibonding neutrons | |
| 8. |
Following is the increasing order of melting point of materials |
| A. | Silicon, Tungsten, Copper, Aluminium |
| B. | Copper, Silicon, Aluminium, Tungsten |
| C. | Aluminium, Copper, Mild steel, Tungsten |
| D. | Tungsten, Mild steel, Copper & Aluminium |
| Answer» D. Tungsten, Mild steel, Copper & Aluminium | |
| 9. |
Phenol and formaldehyde are polymerized to a resultant produt known as |
| A. | PVC |
| B. | Bakelite |
| C. | Polyester |
| D. | Teflon |
| Answer» C. Polyester | |
| 10. |
Corundum is composed of about 85 percent of |
| A. | Steel |
| B. | Aluminium oxide |
| C. | Iron oxide |
| D. | Silicon |
| Answer» C. Iron oxide | |
| 11. |
Iron at room temperature has BCC structure and atomic radius of \(1.24 ~\dot A\). The lattice constant of iron will be |
| A. | \(3.864~\dot A\) |
| B. | \(2.864~\dot A\) |
| C. | \(1.864~\dot A\) |
| D. | \(0.664~\dot A\) |
| Answer» C. \(1.864~\dot A\) | |
| 12. |
Consider the following statements:1. Baking soda is used in fire extinguishes2. Quick lime is used in the manufacture of glassWhich of the above statements is / are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» D. Neither 1 nor 2 | |
| 13. |
Direction: It consists of two statements, one labelled as ‘Statement (I)’ and the others as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the codes given below:Statement (I): Fatigue failure is a stress which is lower than the yield strength of a metal.Statement (II): Repeated straining lowers the yield strength. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» B. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) | |
| 14. |
Consider the following statements regarding the electrical properties of ceramic materials:1. They are practically non-conductors at a lower temperature.2. Ordinary glass and silicates in the molten state are dependable as electrical non-conductors.3. They offer high resistance to the current transmission and get heated soon when conducting electric currents.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» C. 2 and 3 only | |
| 15. |
Density of mild steel is _______ kg / m3 |
| A. | 10,200 |
| B. | 7,860 |
| C. | 9,010 |
| D. | None of these |
| Answer» C. 9,010 | |
| 16. |
How much sulphur is required per 100 kg of final rubber product to completely crosslink butadiene rubber? |
| A. | 17 kg |
| B. | 27 kg |
| C. | 37 kg |
| D. | 47 kg |
| Answer» D. 47 kg | |
| 17. |
Direction: It consists of two statements, one labelled as ‘Statement (I)’ and the others as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the codes given below:Statement (I): Graph between potential energy of spring versus the extension o r compression of the spring is a straight line.Statement (II): Potential energy of a stretched or compressed spring, is directly proportional to square of extension or compression. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» E. | |
| 18. |
Direction: It consists of two statements, one labelled as ‘Statement (I)’ and the others as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the codes given below:Statement (I): Atoms can neither be created nor destroyed.Statement (II): Under similar conditions of temperature and pressure, equal volumes of gases do not contain an equal number of atoms. |
| A. | Both Statement (I) and Statement (II) individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both statement (I) and Statement (II) are individually true, but Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true, but Statement (II) is false |
| D. | Statement (I) is false, but Statement (II) is true |
| Answer» D. Statement (I) is false, but Statement (II) is true | |
| 19. |
_____ follows the decreasing order of density of the material. |
| A. | Tungsten, Copper, Mild steel, Aluminium |
| B. | Aluminium, Mild steel, Copper, Tungsten |
| C. | Mild steel, Copper, Tungsten, Aluminium |
| D. | Copper, Aluminium, Mild steel, Tungsten |
| Answer» B. Aluminium, Mild steel, Copper, Tungsten | |
| 20. |
A state for ionic compounds wherein there is the exact ratio of cations to anions as predicted by the chemical formula is |
| A. | Electroneutrality |
| B. | Stoichiometry |
| C. | Equiliometry |
| D. | Frankel defect |
| Answer» C. Equiliometry | |