Explore topic-wise MCQs in Analytical Instrumentation.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Analytical Instrumentation knowledge and support exam preparation. Choose a topic below to get started.

1.

When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode.

A. True
B. False
Answer» B. False
Discussion
2.

The cavity resonant frequency should be equal to which of the following?

A. Frequency of electric field
B. Klystron frequency
C. Frequency of magnetic field
D. Mechanical frequency
Answer» C. Frequency of magnetic field
Discussion
3.

In basic ESR spectrometer, the cavity length is adjustable.

A. True
B. False
Answer» C.
Discussion
4.

By introducing which of the following, signal-to-noise ratio can be improved?

A. Small amplitude field modulation
B. Large amplitude field modulation
C. Small amplitude field attenuation
D. Large amplitude field attenuation
Answer» B. Large amplitude field modulation
Discussion
5.

Which of the following routes are the microwaves entering from the klystron towards the cavity?

A. Oscillator
B. Attenuator
C. Circulator
D. Reflector
Answer» D. Reflector
Discussion
6.

Given below is the diagram of Klystron tube. Identify the component.

A. Cathode
B. Anode
C. Grid
D. Reflector electrode
Answer» E.
Discussion
7.

IN_BASIC_ESR_SPECTROMETER,_THE_CAVITY_LENGTH_IS_ADJUSTABLE.?$

A. True
B. False
Answer» C.
Discussion
8.

When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode.$

A. True
B. False
Answer» B. False
Discussion
9.

The cavity resonant frequency should be equal to which of the following?$

A. Frequency of electric field
B. Klystron frequency
C. Frequency of magnetic field
D. Mechanical frequency
Answer» C. Frequency of magnetic field
Discussion
10.

The output of the klystron does not pass through which of the following?

A. Isolator
B. Reflector
C. Power leveller
D. Directional coupler
Answer» C. Power leveller
Discussion
11.

At which of the following frequencies is the magnetic field at the sample modulated?

A. 1 kHz
B. 10 kHz
C. 100 kHz
D. 1000 kHz
Answer» D. 1000 kHz
Discussion
12.

Which of the following is the operating frequency of the ESR spectrometer?

A. 1.7 to 3.4 GHz
B. 1.5 to 4.2 GHz
C. 3.2 to 5.4 GHz
D. 8.8 to 9.6 GHz
Answer» E.
Discussion
13.

From which of the following are electrons emitted in the klystron tube?

A. Cathode
B. Anode
C. Grid
D. Reflector electrode
Answer» B. Anode
Discussion
14.

Which of the following is adjusted as a fine control for frequency tuning?

A. Cathode
B. Anode
C. Reflector voltage
D. Grid
Answer» D. Grid
Discussion
15.

By introducing which of the following, signal-to- noise ratio can be improved?

A. Small amplitude field modulation
B. Large amplitude field modulation
C. Small amplitude field attenuation
D. Large amplitude field attenuation
Answer» B. Large amplitude field modulation
Discussion
16.

Which of the following routes the microwaves entering from the klystron towards the cavity?

A. Oscillator
B. Attenuator
C. Circulator
D. Reflector
Answer» D. Reflector
Discussion
17.

Microwaves reflected back from the cavity are routed to which of the following?

A. Attenuator
B. Klystron
C. Load
D. Diode detector
Answer» E.
Discussion
18.

Which of the following is also known as reflex oscillator?

A. Triode
B. Pentode
C. Special tube
D. Klystron tube
Answer» E.
Discussion
19.

Microwaves are generated by __________ and the power level is adjusted with the ________

A. Triode, rectifier
B. Pentode, attenuator
C. Klystron tube, attenuator
D. Diode, rectifier
Answer» D. Diode, rectifier
Discussion
20.

Microwave frequency can be tuned over a small range by adjusting the distance between which of the following?

A. Cathode and anode
B. Anode and the reflector
C. Cathode and the reflector
D. Cathode and grid
Answer» D. Cathode and grid
Discussion