# Es&t018

10 Questions | Total Attempts: 316

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This QUIZ is made or by product  of my continuous research & study about Electronics Engineering to help the Electronics Engineer/Technician Aspirants in passing the Board Examinations.

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• 1.
The microwave frequency range is considered to start at:
• A.

100 MHz

• B.

1 GHz

• C.

10 GHz

• D.

100 GHz

• 2.
The UHF range is:
• A.

Below the microwave range

• B.

Inside the microwave range

• C.

Above the microwave range

• D.

Same as the microwave range

• 3.
The dominant mode of a waveguide depends on:
• A.

The shape of the waveguide

• B.

The power level of the signal

• C.

The point of signal injection

• D.

None of the above

• 4.
The dominant mode of a rectangular waveguide is:
• A.

TE01

• B.

TM01

• C.

TE10

• D.

TM10

• 5.
The dominant mode of a circular waveguide is:
• A.

TE 01

• B.

TM 01

• C.

TE 11

• D.

TM11

• 6.
Circular waveguides use TM 01 mode because:
• A.

It is dominant

• B.

Of its circular symmetry

• C.

It is the only mode possible

• D.

It is more efficient

• 7.
The characteristic impedance of a waveguide:
• A.

Is fixed

• B.

Depends on the frequency it carries

• C.

Depends on the longer dimension of its cross section

• D.

Both b and c

• 8.
Power can be coupled into or out of a waveguide:
• A.

With a magnetic field probe

• B.

With an electric field probe

• C.

Through a hole in the waveguide

• D.

All of the above

• 9.
Directional couplers for waveguides are characterized by:
• A.

Their insertion loss

• B.

Their coupling specification

• C.

Their directivity

• D.

All of the above

• 10.
Striplines and microstrips are used to:
• A.

Couple sections of waveguide

• B.

Couple waveguides to antennas

• C.

Couple components on a circuit board

• D.

None of the above