What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?

In a pulsed radar set, the function of the duplexer is to

A

Aid in calibrating the display unit

B

Prevent frequency drift in the klystron

C

Allow the transmitter and the receiver to operate from a common antenna

D

All of these

The function of ferrite antenna is to ___________

A

Reduce stray capacitance

B

Stabilise d.c. bias

C

Increase the Q of tuned circuit

D

Reduce noise

What is the delay time for satellite transmission from earth transmitter to earth receiver?

A

0.5 s

B

1.0 s

C

5 ms

D

0.25 ms

The environment in which the transmitter or receiver are should be __________

A

Complex

B

Competent

C

Complete

D

Compatible

Four defensive football players are chasing the opposing wide receiver, who has the ball. Calvin is directly behind the ball carrier. Jenkins and Burton are side by side behind Calvin. Zeller is behind Jenkins and Burton. Calvin tries for the tackle but misses and falls. Burton trips. Which defensive player tackles the receiver?

A

Burton

B

Zeller

C

Jenkins

D

Calvin

In a TV receiver antenna the length of reflector rod

A

Is the same as that of dipole

B

Is less than that of dipole

C

Is more than that of dipole

D

May be equal, more or less than that of dipole

Which antenna is a wideband antenna?

A

Hertz antenna

B

Marconi antenna

C

Folded dipole

D

None of the above

A Yagi antenna has a driven antenna

A

Only

B

With a reflector

C

With one or more directors

D

With a reflector and one or more directors

The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If the maximum number of valves that can be closed at the same time are closed which of the following must true?

A

R is open

B

S is open

C

T is open

D

Z is open

Defining green banking is relatively easy. It means promoting environment -friendly practices and reducing your carbon footprint from your banking activities. This comes in many forms : using online banking instead of branch banking; paying bills online, opening up CDs (certificates of deposit) and money market accounts at online banks instead of large multi-branch banks. A green bank takes the biggest steps to support local green initiatives. Any combination of the above personal banking practices can help the environment. In this respect, online banks and smaller community banks have better track records than larger banks .However, these larger banks may be induced to go green . According to the passage, larger, multi -branch banks .

A

can never become green banks .

B

can become green banks if they reduce the number of branches and eliminate the use of paper .

C

can become green banks if they can greatly reduce or eliminate carbon footprint form their banking activities.

D

can become green banks if they support local green initiatives

What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?

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