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ISRO EC 2018:Microwave Engineering Booster Quiz 1
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Question 1
Statement (I): Integrating DVM measures the true average value of the input voltage over a fixed measuring period.
Statement (II): Since the display of measured signal is a decimal number, the errors due to parallax and observation error are eliminated.
Which of the following statement is correct?
Statement (II): Since the display of measured signal is a decimal number, the errors due to parallax and observation error are eliminated.
Which of the following statement is correct?
Question 2
Consider the following regarding essential functional operations of a digital data acquisition system:
1) Handling of analog signals
2) Converting the data to digital form and handling it
3) Making the measurement
4) Internal programming and telemetry
Which of the above are valid in the stated context?
1) Handling of analog signals
2) Converting the data to digital form and handling it
3) Making the measurement
4) Internal programming and telemetry
Which of the above are valid in the stated context?
Question 3
The following quantity is not required in the calculation of Q of a cavity resonator.
Question 4
Consider the following statements for TEM (Transverse Electro Magnetic) waves.
1). Only for TEM wave, could the conductor separation be small compared with a wavelength.
2). TEM mode needs to be considered at low frequencies.
3). TEM waves are usually not obeying Maxwell’s equations.
4). TEM waves are usually treated like ‘ordinary transmission line signals’.
Which of the above statements are correct?
1). Only for TEM wave, could the conductor separation be small compared with a wavelength.
2). TEM mode needs to be considered at low frequencies.
3). TEM waves are usually not obeying Maxwell’s equations.
4). TEM waves are usually treated like ‘ordinary transmission line signals’.
Which of the above statements are correct?
Question 5
Consider the following statements in case of a magic Tee
1). The collinear arms are isolated from each other
2). One of the collinear arms is isolated from E-arm
3). One of the collinear arms is isolated from H-arm
4). E and H arms are isolated from each other
Which of these statements are correct?
1). The collinear arms are isolated from each other
2). One of the collinear arms is isolated from E-arm
3). One of the collinear arms is isolated from H-arm
4). E and H arms are isolated from each other
Which of these statements are correct?
Question 6
Assertion (A): In microwave communication links intensive fading at 18 GHz band occurs due to rain-drop attenuation..
Reason (R): Collective scattering from water droplets in the atmosphere will result in diminution of energy in the forward path and this is maximum at the 18 GHz band because the criterion for scattering are more satisfied by the wavelength dimensions at these frequencies.
Reason (R): Collective scattering from water droplets in the atmosphere will result in diminution of energy in the forward path and this is maximum at the 18 GHz band because the criterion for scattering are more satisfied by the wavelength dimensions at these frequencies.
Question 7
Which of the following antenna gives circular polarization?
1). Yagi-Uda
2). Parabolic
3). Helical
4). Dipole
1). Yagi-Uda
2). Parabolic
3). Helical
4). Dipole
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Aug 14ESE & GATE EC
