MCQOPTIONS
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MCQOPTIONS
This section includes 69 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
If the line 3x + 4y – 24 = 0 intersects the x-axis at the point A and the y-axis at the point B, then the in centre of the triangle OAB, where O is the origin, is: |
| A. | (3, 4) |
| B. | (2, 2) |
| C. | (4, 3) |
| D. | (4, 4) |
| Answer» C. (4, 3) | |
| 52. |
A point on the straight line, 3x + 5y = 15 which is equidistant from the coordinate axes will lie only in: |
| A. | 4th quadrants |
| B. | 1st quadrants |
| C. | 1st and 2nd quadrants |
| D. | 1st, 2nd and 4th quadrants |
| Answer» D. 1st, 2nd and 4th quadrants | |
| 53. |
If x2 + 3xy + 2y2 - x - 4y - 6 = 0 represents a pair of straight lines, their point if intersection is |
| A. | (0, 0) |
| B. | (8, 5) |
| C. | (8, -5) |
| D. | (-2, 5) |
| Answer» D. (-2, 5) | |
| 54. |
If the sum of the slopes of the lines given by x2 - 2cxy - 7y2 = 0 is four time their products, then the value of c is |
| A. | 1 |
| B. | -1 |
| C. | -2 |
| D. | 2 |
| Answer» E. | |
| 55. |
If (a, b) is at unit distance from the line 8x + 6y + 1 = 0, then which of the following conditions are correct?1. 3a – 4b – 4 = 02. 8a + 6b + 11 = 03. 8a + 6b – 9 = 0Select the correct answer using the code given below: |
| A. | 1 and 2 only |
| B. | 2 and 3 only |
| C. | 1 and 3 only |
| D. | 1, 2 and 3 |
| Answer» C. 1 and 3 only | |
| 56. |
If the straight line ax + by + c = 0 always passes through (1, -2), then a, b, c are in |
| A. | A.P. |
| B. | H.P. |
| C. | G.P. |
| D. | None of these |
| Answer» B. H.P. | |
| 57. |
If the lines y + px = 1 and y - qx = 2 are perpendicular, then which one of the following is correct? |
| A. | pq + 1 = 0 |
| B. | p + q + 1 = 0 |
| C. | pq - 1 = 0 |
| D. | p - q + 1 = 0 |
| Answer» D. p - q + 1 = 0 | |
| 58. |
If the points (x, y, -3), (2, 0, -1) and (4, 2, 3) lie on a straight line, then what are the values of x and y respectively? |
| A. | 1, -1 |
| B. | -1, 1 |
| C. | 0, 2 |
| D. | 3, 4 |
| Answer» B. -1, 1 | |
| 59. |
Find the distance between two points A (-3, 4) and B (3, -4) |
| A. | 0 |
| B. | √10 |
| C. | 100 |
| D. | 10 |
| Answer» E. | |
| 60. |
FOR_A_TRANSMISSION_LINE,_L=1.8MH/M_C=0.01PF/M,_THEN_THE_PHASE_CONSTANT_OF_THE_LINE_WHEN_OPERATED_AT_A_FREQUENCY_OF_1_GHZ_IS:?$ |
| A. | 4.2426 |
| B. | 2.2 |
| C. | 0.3 |
| D. | 1 |
| Answer» B. 2.2 | |
| 61. |
IN_A_CERTAIN_MICROWAVE_TRANSMISSION_LINE,_THE_CHARACTERISTIC_IMPEDANCE_WAS_FOUND_TO_BE_210_10¬¨¬®‚ÄÖ√†√ª‚ÂÀ√≠¬¨¬©_AND_PROPAGATION_CONSTANT_0.2_78¬¨¬®‚ÄÖ√†√ª.WHAT_IS_THE_IMPEDANCE_Z_OF_THE_LINE,_IF_THE_FREQUENCY_OF_OPERATION_IS_1_GHZ??$# |
| A. | 0.035+j41.97 |
| B. | 0.35+j4.97 |
| C. | 35.6+j4.28 |
| D. | 9.254+j4.6 |
| Answer» B. 0.35+j4.97 | |
| 62. |
A microwave generator at 1.2 GHz supplies power to a microwave transmission line having the parameters R=0.8Ω/m, G=O.8millisiemen/m, L=0.01µH/m and C=0.4PF/m. Propagation constant of the transmission line is?# |
| A. | 0.0654 +j0.48 |
| B. | 0.064+j4.8 |
| C. | 6.4+j4.8 |
| D. | none of the mentioned |
| Answer» B. 0.064+j4.8 | |
| 63. |
Expression for phase constant β is:$ |
| A. | ‚àöLC |
| B. | ω √LC |
| C. | 1/ (ω √LC) |
| D. | None of the mentioned |
| Answer» C. 1/ (‚âà√¨‚àö¬¢ ‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇLC) | |
| 64. |
For a lossless line, which of the following is true? |
| A. | γ=jβ |
| B. | γ=α |
| C. | γ=α+jβ |
| D. | γ=α*jβ |
| Answer» B. ‚âà√≠‚Äö√¢‚Ä¢=‚âà√≠¬¨¬± | |
| 65. |
If the admittance and the impedance of a transmission line are 100 Ω and 50 Ω of a respectively, then value of phase constant β is:$ |
| A. | 0 |
| B. | 20 |
| C. | 132 |
| D. | 50 |
| Answer» B. 20 | |
| 66. |
The expression for a phase velocity of a transmission line is: |
| A. | ‚àöLC |
| B. | 1/‚àöLC |
| C. | X<sub>L</sub>+X<sub>c</sub> |
| D. | X<sub>L</sub>/X<sub>c</sub> |
| Answer» C. X<sub>L</sub>+X<sub>c</sub> | |
| 67. |
If a transmission line with inductive reactance of 41.97 Ω and capacitive reactance of 1132.5Ω is operated at 1 GHz , then its phase constant is:$ |
| A. | 0.0305 |
| B. | 0.3 |
| C. | 30.3 |
| D. | 0.6 |
| Answer» B. 0.3 | |
| 68. |
If propagation constant is 12:60°, then the value of phase constant and attenuation constant is:$ |
| A. | α=6, β=10.39 |
| B. | α=61, β=78 |
| C. | α=12, β=20.6 |
| D. | none of the mentioned |
| Answer» B. ‚âà√≠¬¨¬±=61, ‚âà√≠‚Äö√¢¬ß=78 | |
| 69. |
The value of ‘α’ for a lossless line is: |
| A. | 0 |
| B. | 1 |
| C. | Infinity |
| D. | Data insufficient |
| Answer» B. 1 | |