X-Ray Fluorescent MCQs : This section focuses on the "X-Ray Fluorescent". These Multiple Choice Questions (MCQs) should be practiced to improve the X-Ray Fluorescent skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Energy dispersive system uses which of the following detectors?
A. Optical detector
B. Semiconductor detector
C. Thermistor
D. Bolometer
Question 2
In curved crystal arrangement, angular velocity of the crystal is twice that of the detector.
A. True
B. False
Question 3
In Energy dispersive system, the energy level and the number of pulses is related to which of the following?
A. Amount of sample, element involved
B. Element involved, concentration of the element
C. Concentration of the element, element involved
D. Number of atoms, amount of sample
Question 4
The analysis of X-ray beam by diffraction is similar to spectrum analysis carried out with a diffraction grating.
A. True
B. False
Question 5
The crystal used as X-ray grating has _______ dimensional lattice arrays.
A. One
B. Two
C. Three
D. Four
Question 6
Which of the following can be done to avoid loss of intensities of X-rays due to the absorption of long wavelength X-rays?
A. Apparatus must be contained in a chamber
B. Air in the chamber must be replaced by helium
C. Inert gas atmosphere must be provided
D. Proper slits must be used
Question 7
Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?
A. Transmission-anode X-ray tube
B. Secondary fluorescence target
C. Slit
D. Filters
Question 8
Which of the following components of the X-ray fluorescent spectrometer induces fluorescent radiation?
A. Excitation source
B. Energy analyser
C. X-ray spectrometer
D. Detection System
Question 9
Which of the following does not make the X-ray tube nearly monochromatic?
A. Transmission-anode X-ray tube
B. Secondary fluorescence target
C. Slit
D. Filters
Question 10
Which of the following is the disadvantage of silicon semiconductor detector?
A. Low stable
B. Can be operated only at low temperatures
C. Have low count-rate
D. Low resolution
Question 11
Why is a mono-energetic radiation source required in X-ray fluorescent spectrometer?
A. To provide good sensitivity
B. To provide high accuracy
C. To provide a proper range
D. To reduce unwanted background