MCQ NO.1154 | IMA
Which of the following is the advantage of grating monochromators?
Which of the following is the advantage of grating monochromators?
Anonymous Quiz
22%
Dispersion is non-overlapping
35%
Dispersion occurs in non-linear manner
17%
Dispersion is overlapping
27%
Dispersion occurs in a linear manner
MCQ NO.1155 | IMA
Which of the following is not a detector used in Flame emission photometers?
Which of the following is not a detector used in Flame emission photometers?
Anonymous Quiz
14%
Photronic cell
22%
Photovoltaic cell
17%
Photoemissive tube
46%
Chromatogram
MCQ NO.1156 | IMA
The function of pressure regulators in emission system of flame photometer is to have a steady flame which is free from flickers.
The function of pressure regulators in emission system of flame photometer is to have a steady flame which is free from flickers.
Anonymous Quiz
78%
True
22%
False
MCQ NO.1157 | IMA
In Total consumption burner, only samples of particular droplet size will enter the burner.
In Total consumption burner, only samples of particular droplet size will enter the burner.
Anonymous Quiz
69%
True
31%
False
MCQ NO.1158 | IMA
Phototubes are more sensitive than photovoltaic cells.
Phototubes are more sensitive than photovoltaic cells.
Anonymous Quiz
69%
True
31%
False
MCQ NO.1159 | IMA
Which of the following is not an application of Flame emission photometers?
Which of the following is not an application of Flame emission photometers?
Anonymous Quiz
27%
Analysis of biological fluids
32%
Determination of sodium, potassium in soil
21%
Determination of metals such as Mn, Cu
21%
Analysis of complex mixtures
MCQ NO.1169 | IMA
Which of the following is not an advantage of photovoltaic cell which is used as a detector in Flame emission photometers?
Which of the following is not an advantage of photovoltaic cell which is used as a detector in Flame emission photometers?
Anonymous Quiz
17%
Portable
28%
No external supply
36%
Robust in construction
19%
Does not show fatigue
MCQ NO.1161 | IMA
If Propane and air are used in burner how many °C temp. is produced ?
If Propane and air are used in burner how many °C temp. is produced ?
Anonymous Quiz
19%
1900°C
42%
2200°C
25%
2300°C
14%
2100°C
MCQ NO.1162 | IMA
Which of the following components of the X-ray fluorescent spectrometer induces fluorescent radiation?
Which of the following components of the X-ray fluorescent spectrometer induces fluorescent radiation?
Anonymous Quiz
25%
Excitation source
20%
Energy analyser
50%
X-ray spectrometer
5%
Detection System
MCQ NO.1163 | IMA
Why is a mono-energetic radiation source required in X-ray fluorescent spectrometer?
Why is a mono-energetic radiation source required in X-ray fluorescent spectrometer?
Anonymous Quiz
32%
To provide good sensitivity
32%
To provide high accuracy
20%
To provide a proper range
16%
To reduce unwanted background
MCQ NO.1164 | IMA
Which of the following does not make the X-ray tube nearly monochromatic?
Which of the following does not make the X-ray tube nearly monochromatic?
Anonymous Quiz
20%
Transmission-anode X-ray tube
39%
Secondary fluorescence target
28%
Slit
13%
Filters
MCQ NO.1165 | IMA
Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?
Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?
Anonymous Quiz
32%
Transmission-anode X-ray tube
32%
Secondary fluorescence target
23%
Slit
12%
Filters
MCQ NO.1165 | IMA
Energy dispersive system uses which of the following detectors?
Energy dispersive system uses which of the following detectors?
Anonymous Quiz
17%
Optical detector
41%
Semiconductor detector
25%
Thermistor
16%
Bolometer
MCQ NO.1166 | IMA
In Energy dispersive system, the energy level and the number of pulses is related to which of the following?
In Energy dispersive system, the energy level and the number of pulses is related to which of the following?
Anonymous Quiz
14%
Amount of sample, element involved
41%
Element involved, concentration of the element
33%
Concentration of the element, element involved
12%
Number of atoms, amount of sample
MCQ. NO.1167 | IMA
The analysis of X-ray beam by diffraction is similar to spectrum analysis carried out with a diffraction grating.
The analysis of X-ray beam by diffraction is similar to spectrum analysis carried out with a diffraction grating.
Anonymous Quiz
76%
True
24%
False
MCQ NO.1168 | IMA
The crystal used as X-ray grating has _______ dimensional lattice arrays?
The crystal used as X-ray grating has _______ dimensional lattice arrays?
Anonymous Quiz
14%
One
39%
Two
40%
Three
7%
Four
MCQ NO.1169 | IMA
Which of the following can be done to avoid loss of intensities of X-rays due to absorption of long wavelength X-rays?
Which of the following can be done to avoid loss of intensities of X-rays due to absorption of long wavelength X-rays?
Anonymous Quiz
14%
Apparatus must be contained in a chamber
51%
Air in the chamber must be replaced by helium
23%
Inert gas atmosphere must be provided
11%
Proper slits must be used
MCQ NO.1170 | IMA
In curved crystal arrangement, angular velocity of the crystal is twice that of the detector.
In curved crystal arrangement, angular velocity of the crystal is twice that of the detector.
Anonymous Quiz
76%
True
24%
False
MCQ NO.1171 | IMA
Which of the following is the disadvantage of silicon semiconductor detector?m
Which of the following is the disadvantage of silicon semiconductor detector?m
Anonymous Quiz
11%
Low stable
60%
Can be operated only at low temperatures
16%
Have low count-rate
13%
Low resolution