MCQOPTIONS
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MCQOPTIONS
This section includes 22 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the false statement. |
| A. | Sum of voltage over any closed loop is zero |
| B. | Kirchhoff’s Laws can be applied to any circuit, regardless of its structure and composition |
| C. | Kirchhoff’s 2nd law is applied at nodes |
| D. | Kirchhoff’s 1st law can be applied for both planar and non-planar circuits |
| Answer» D. Kirchhoff’s 1st law can be applied for both planar and non-planar circuits | |
| 2. |
Which among the following can be used to analyze circuits? |
| A. | Kirchhoff’s Law |
| B. | Newton’s Law |
| C. | Coulomb’s Law |
| D. | Stephan’s Law |
| Answer» B. Newton’s Law | |
| 3. |
Kirchhoff’s laws are applicable in the presence of magnetic field. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The diagram below shows a network of 5 branches. Given: I1 = -5A; I4 = 10A; I5 = 15A |
| A. | I2 = -15A; I3 = -5A; I6 = -15A |
| B. | I2 = 15A; I3 = 5A; I6 = -15A |
| C. | I2 = -15A; I3 = -5A; I6 = 15A |
| D. | I2 = 15A; I3 = 5A; I6 = 15A |
| Answer» E. | |
| 5. |
In the circuit shown below, calculate the current flowing through 20V cell. |
| A. | 12A |
| B. | 15A |
| C. | 12.5A |
| D. | 12.3A |
| Answer» D. 12.3A | |
| 6. |
Calculate the value of current I4. |
| A. | -9A |
| B. | 9A |
| C. | 5A |
| D. | 1A |
| Answer» C. 5A | |
| 7. |
Kirchhoff’s first law supports law of conservation of charge. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Identify the correct statement from the following. |
| A. | While traversing in a closed loop, if negative pole of cell is encountered first, then the emf is negative |
| B. | The product of resistance and current in an arm is taken to be positive if the direction of current is opposite to the direction in which one moves along the closed loop |
| C. | Current flowing away from a junction is taken as positive |
| D. | While traversing in a closed loop, if positive pole of cell is encountered first, then the emf is positive |
| Answer» E. | |
| 9. |
The equation → ∑e = ∑IR is applicable to which law? |
| A. | Kirchhoff’s second law |
| B. | Kirchhoff’s junction rule |
| C. | Kirchhoff’s third law |
| D. | Newton’s Law |
| Answer» B. Kirchhoff’s junction rule | |
| 10. |
Consider two surfaces, one absolutely black and the other non-black. These surfaces are arranged parallel to each other and so close that the radiation of one falls totally on the other. Choose the correct option |
| A. | 1 denotes the radiant energy E emitted by the non-black surface impinges on the black surface |
| B. | 1 denotes the radiant energy E emitted by the black surface impinges on the non-black surface |
| C. | 2 and 3 denotes the quantity α E b |
| D. | 4 denotes the quantity (1 – α) E b |
| Answer» B. 1 denotes the radiant energy E emitted by the black surface impinges on the non-black surface | |
| 11. |
If the temperature of a hot body is increased by 50%, the amount of radiations emitted by it would increase by nearly |
| A. | 200% |
| B. | 500% |
| C. | 50% |
| D. | 100% |
| Answer» C. 50% | |
| 12. |
The temperature of a solid surface changes from 27 K to 627 K. The emissive power changes would then confirm to the ratio |
| A. | 6:1 |
| B. | 9:1 |
| C. | 81:1 |
| D. | 27:1 |
| Answer» D. 27:1 | |
| 13. |
If radiant energy E B emitted by the black surface strikes the non-black surface. If non-black surface has absorptivity α, it will absorb how much radiations? |
| A. | α E B |
| B. | 2 α E B |
| C. | 3 α E B |
| D. | 4 α E B |
| Answer» B. 2 α E B | |
| 14. |
IF_THE_TEMPERATURE_OF_A_HOT_BODY_IS_INCREASED_BY_50%,_THE_AMOUNT_OF_RADIATIONS_EMITTED_BY_IT_WOULD_INCREASE_BY_NEARLY?$ |
| A. | 200% |
| B. | 500% |
| C. | 50% |
| D. | 100% |
| Answer» C. 50% | |
| 15. |
The temperature of a solid surface changes from 27 K to 627 K. The emissive power changes would then confirm to the rati? |
| A. | 6:1 |
| B. | 9:1 |
| C. | 81:1 |
| D. | 27:1 |
| Answer» D. 27:1 | |
| 16. |
With an increase in wavelength, the monochromatic emissive power of a black body |
| A. | Increases |
| B. | Decreases |
| C. | Decreases, reaches a minimum and then increases |
| D. | Increases, reaches a maximum and then decreases |
| Answer» E. | |
| 17. |
The emissivity and the absorptivity of a real surface are equal for radiation with identical temperature and wavelength. This law is referred to as |
| A. | Kirchhoff’s law |
| B. | Lambert’s law |
| C. | Planck’s law |
| D. | Wein’s displacement law |
| Answer» B. Lambert‚Äö√Ñ√∂‚àö√ë‚àö¬•s law | |
| 18. |
Choose the false statement |
| A. | Snow is nearly black to thermal radiation |
| B. | Absorption of radiation occurs in a very thin layer of material near the surface |
| C. | Transmissivity varies with the wavelength of incident radiation |
| D. | Most of the engineering materials have rough surfaces, and these rough surfaces give regular (specular) reflections |
| Answer» E. | |
| 19. |
A diathermanous body |
| A. | Shines as a result of incident radiation |
| B. | Gets heated up a result of absorption of incident radiation |
| C. | Allows all the incident radiation to pass through it |
| D. | Partly absorbs and partly reflects the incident radiation |
| Answer» D. Partly absorbs and partly reflects the incident radiation | |
| 20. |
The absorptivity of black body equals to |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 21. |
If two surfaces are at the same temperature, then the conditions correspond to mobile thermal equilibrium for which the resultant interchange of heat is zero are |
| A. | 3 E – α E<sub> B</sub> = 0 |
| B. | 2 E – α E<sub> B</sub> = 0 |
| C. | E – α E<sub> B</sub> = 0 |
| D. | ½ E – α E<sub> B</sub> = 0 |
| Answer» D. ¬¨¬®≈í¬© E ‚Äö√Ñ√∂‚àö√ë‚àö¬® ‚âà√≠¬¨¬± E<sub> B</sub> = 0 | |
| 22. |
If radiant energy E B emitted by the black surface strikes the non-black surface. If non-black surface has absorptivity α, it will absorb how much radiations? |
| A. | α E<sub> B</sub> |
| B. | 2 α E<sub> B</sub> |
| C. | 3 α E<sub> B</sub> |
| D. | 4 α E<sub> B</sub> |
| Answer» B. 2 ‚âà√≠¬¨¬± E<sub> B</sub> | |