Multiple choice question for engineering
1. The characterisation of auger spectroscopy can be achieved up to which of the following depths?
a) 1 nm
b) 2 nm
c) 4 nm
d) 8 nm
2. Auger electron spectroscopy can be used for surface chemical analysis in a way similar to which of the following?
d) Ion spectroscopy
3. AES is limited when it comes to very high resolution studies.
4. Qualitative chemical analysis is very often performed using which of the following?
d) Ion spectroscopy
5. Electron ionization can produce which of the following?
a) ESCA electron
b) Auger electron
6. Electron ionisation can produce ESCA electrons.
7. Which of the following is an Auger transition starting from a hole in 1s levels which would be filled up from the 2p level?
a) KLM transition
b) KLL transition
c) LMN transition
d) LLM transition
8. In ESCA process, the photon ejects which of the following?
a) 1s electron
b) 1p electron
c) 2s electron
d) 2p electron
9. In Auger process, an electron drops to fill which of the following?
a) 1s hole
b) 1p hole
c) 2s hole
d) 2p hole
10. Auger electron spectroscopy involves the irradiation of the surface to be analysed with a beam of electrons of energy in the _________ range.
a) 1-2 KeV
b) 2-4 KeV
c) 4-8 KeV
d) 1-8 KeV
11. In Auger spectroscopy, beam currents are typically _____ in a beam of diameter 0.5mm.
a) 5-10 µA
b) 5-20 µA
c) 5-30 µA
d) 5-50 µA
12. Which of the following is the detection limit of Auger Electron Spectroscopy?
a) 0.1% monolayer
b) 0.5% monolayer
c) 1% monolayer
d) 2% monolayer
13. Which of the following denotes the sample destruction that occurs in Auger electron spectroscopy?
a) None in 95% of sample
b) None in 99% of sample
c) None in 100% of sample
14. How is the specificity of Auger electron spectroscopy?
a) Very bad
d) Very good
15. AES is more sensitive than XPS because of which of the following factors?
a) Binding energies of electrons
b) Kinetic energies of electrons
c) Mass of electrons
d) Mass to charge ratio of electrons
1. Given below is the diagram of Klystron tube. Identify the component.
d) Reflector electrode
2. 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
3. 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
4. Which of the following is also known as reflex oscillator?
c) Special tube
d) Klystron tube
5. Microwaves reflected back from the cavity are routed to which of the following?
d) Diode detector
6. Which of the following routes the microwaves entering from the klystron towards the cavity?
7. 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
8. Which of the following is adjusted as a fine control for frequency tuning?
c) Reflector voltage
9. In basic ESR spectrometer, the cavity length is adjustable.
10. 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
11. When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode.
12. From which of the following are electrons emitted in the klystron tube?
d) Reflector electrode
13. 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
14. 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
15. The output of the klystron does not pass through which of the following?
c) Power leveller
d) Directional coupler
1. Which of the following is not a characteristic of the immobilized enzymes?
a) They cannot be re-used
b) It produces reproducible results
c) Stability exists
d) Same catalytic activity is present for number of analysis
2. Which of the following is the physico-chemical component?
d) Cells or tissues
3. An example of bio sensor, urea electrode makes use of which of the following electrodes?
a) Carbon dioxide electrode
b) Ammonia electrode
c) Fluoride electrode
d) Ammonium electrode
4. In glucose electrode, glucose oxidase has been coupled to an electrode by which of the following materials?
a) Ferrocene derivatives
5. Biosensors measure glucose concentrations between which of the following ranges?
a) 10-1 to 10-2 M
b) 10-2 to 10-4 M
c) 10-1 to 10-4 M
d) 10-1 to 10-7 M
6. Transducers employed in the bulk of enzyme electrodes use which of the following principles?
7. Which of these biosensors use the principle of heat released or absorbed by a reaction?
a) Potentiometric biosensor
b) Optical biosensors
c) Piezo-electric biosensors
d) Calorimetric biosensors
8. Which of the following biosensors use the movement of electrons produced during redox reactions?
a) Amperometric biosensor
b) Potentiometric biosensors
c) Piezo-electric biosensors
d) Optical biosensors
9. Nanoscopic optical biosensors have fast response time but the sensitivity is reduced.
10. Given below is the diagram of biosensor. Identify the unmarked component.
d) A/D converter
11. In glucose sensor, a measure of change in oxygen value is a measure of the glucose value.
12. For constructing the glucose sensor, which of the following is used as gel?
1. Tandem mass spectroscopy combines which of the following devices?
a) Mass spectrometer and gas-solid chromatograph
b) Mass spectrometer and gas-liquid chromatograph
c) Mass spectrometer and gas chromatograph
d) Mass spectrometer and mass spectrometer
2. In tandem spectroscopy, the first stage sepatation device is a mass spectrometer.
3. Which of the following is used to separate a single mass that is characteristic of a given analyte in a mixture?
a) First mass spectrometer
b) Second mass spectrometer
4. The mass-selected ions are activated in which of the following ways that causes them to fall apart to produce product ions?
a) Collisional activation
b) Evaporational activation
c) Inert gas activation
d) Thermal activation
5. The final MS/MS spectrum consists only of product ions from the selected precursor.
6. In reverse-geometry mass spectrometer which of the following precedes the electric sector?
c) Magnetic sector
d) Mass spectrometer
7. A magnetic sector alone can be used as a mass spectrometer, with roughly _____ resolution.
8. What does the acronym ‘MIKES’ stand for?
a) Mass-analysed ion kinetic energy spectrometer
b) Mass-based induced kinetic energy spectrometer
a) Mass invasive kinetic electric spectrometer
a) Mass-analyser in kinetic energy-type spectrometer
9. In MIKES experiments which of the following are measured?
a) Product ions
b) Product ion kinetic energies
c) Product ions mass to charge ratio
d) Product ions masses
10. All ions with the same number of charges will have __________
a) Same kinetic energy
b) Different kinetic energies
c) Same mass
d) Different mass
11. A tandem mass spectrometer has which of the following analysers?
a) Time of flight mass analyser
b) Magnetic deflection analyser
c) Radiofrequency analyser
d) Quadrupole analyser
12. Which of the following filters are used in tandem spectrometer?
a) Quadrupole mass filter
b) Low energy filter
c) High energy filter
d) Time of flight mass filter
13. B/E scan is which of the following scans?
a) Product ion scan
b) Precursor ion scan
c) Mass scan
d) Charge scan
14. Which of the following is located in the region between two analysers?
b) Collision cell
d) Vacuum chamber
15. Given below is the diagram of the drift tube of a tandem quadrupole/time of flight instrument. Identify the unmarked component.
d) Acceleration lens
1. In combination electrode, which of the following electrodes are built together?
a) Primary electrode, secondary reference electrode
b) Primary reference electrode, glass electrode
c) Glass electrode, secondary reference electrode
d) Glass electrode with another glass electrode
2. Which of the following reference electrodes are used as internal and external reference electrodes in combination electrodes?
a) Silver/silver chloride electrode
b) Calomel electrode
c) Mercury/mercury sulphate electrode
d) Mercury/mercury chloride electrode
3. The reference electrodes in combination electrodes are protected against light using which of the following?
a) Emerald green glass
b) Ruby red glass
c) Sapphire blue glass
d) Pearl white glass
4. Combination electrodes containing the electrolyte in gel format have which of the following advantages over normal ones?
a) Simple to use
b) Low maintenance
c) Low cost
d) More accurate
5. Which of the following is not the advantage of gel-filled electrodes?
a) Low maintenance
b) Rugged in construction
c) Easy to maintain
d) Does not cause clogging
6. Good choice for storing combination electrodes is in a buffer solution having which of the following pH?
7. The gel used in combination electrodes does not have which of the following characteristic?
b) USP grade
c) Inorganic material
8. Beckman coulter gel filled combination electrodes provide which of the following features to overcome various problems that occur in gel filled electrodes?
b) Semi-permeable membrane
c) Gas-permeable membrane
d) Micro-pore junction
9. In which of the following solutions must combination electrodes be soaked after cleaning?
10. Gel filled combination electrodes operate in a wide temperature range.
11. In combination electrodes, both the electrodes must be maintained at different temperatures.