example questions for LOK SEWA AAYOG

1. The specially designed port in x-ray tube through which useful x-ray beam emmited is called:
a. Collimator b. Window
c.Filter d. Cone
2. Phase voltage is that voltage is that voltage which exists:
a. between one phase and neutral wire b. between two phases
c. both a. and b. d. none of the above
3. The tube current is the current which flows in the:
a. Filament b. Transformer
c. X-ray tube cathode to anode d. Rectifier
4.The expansion bellows are generally made up of:
a. Rubber b. Plastic
c. Neoprene d. Any of the above material
5. Timer is the device which is responsible to :
a. Initiate an exposure b. Time the exposure
c. Terminate the exposure d. All of the above
6. The most effective device for reducing the amount of scattered radiation , reaching to the film is:
a. Cone b. Diaphragm
c. Stationary Grid d. Filter
7. The performance of Grid can be assessed by:
a. thickness of lead strips b. Lead contents of grid
c. Nature of interspace material d. All of the above
8. The brightness of fluoroscopic material is measured in:
a. Milli-lamberts b. Lamberts
c. Lumen d. None
9. Visual aquity is defined as:
a. photopic vision b. Scotopic vision
c. Mesopic vision d. Telescopic vision
10. The illumination range of conventional fluoroscopic vision is between:
a. 10-1000 mLamberts b. 0.01 to 0.0001 mLamberts
c. 0.00001 to 0.000001 mLamberts d. 100 to 100000 mLamberts
11. The image intensifier tube is complex electronic device and consists of :
a. input phosphor b. Photocathode
c. Output phosphor d. All of the above
12.In modern image intensifier tube, the input phosphor has the  layer of:
a. ZnCdS b. CsI
c. Calcium Tungstate d. All of the above
13.The body section of radiography is also known as:
a. Tomography b. Straitography
c. Laminography d. All of the Above
14.Name the physicist associated with computed tomograhy:
a. GN Hounsfield b. Potter
c. Twinning d. Bucky
15. The main components of CT Scanner is/are:
a. Gantry b. Console
c. Computer d. All of the above
16. Detectors used in CT Sanners are:
a. NaI crystals b. Scintillation Detectors
c. Gas Detectors d. All of the above
17. The CT Number of dense tissue like bone is:
a. 10HU b. 100HU
c. 1000HU d. 10000HU
18. For designing MRI room one should use:
a. Poluvenyl Chloride reinforcing rods b. Iron reinforcing bars
c. Magnetic material d. All of the above
19. The parameters for MR imaging are :
a. Spin density b. Spin lattice relaxation time, T1
c. Spin Spin relaxation time, T2 d. All of the above
20. The gantry for MR imaging system consists of:
a. Enormous magnet & xray tube b. Enormous magnet, Shim coils, Gradient coils, RF transreceiver coils
c. Enormous magnet and high  currentpower     d.None of the above
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