RADIOTHERAPHY- PAGE 6

RADIOTHERAPHY MCQs- PAGE 6

1:-"Involvement of two or more lymph node regions on both sides of the diaphragm with involvement of spleen and extra lymphatic organ" in Ann Arbor staging classification for Hodgkins disease is
A:-III        B:-III S        C:-III E        D:-III SE
Ans: D

2:-The therapeutic ratio of a given regimen is the ratio of
A:-Percentage tumor control with therapy/Percentage complication with therapy
B:-Percentage complication with therapy/Percentage tumor control with therapy
C:-Percentage normal tissue damage/Percentage tumor tissue damage
D:-None of the above
Ans: A

3:-Beckwith Wiedemann Syndrome is associated with Wilm' stumor in
A:-13%        B:-5%        C:-9%        D:-1%
Ans: B

4:-5 year survival rate of inflammatory breast cancer after multidisciplinary management
A:-20%        B:-25%        C:-30%        D:-40%
Ans: D

5:-All the following included in electromagnetic spectrum except
A:-Visible light        B:-Gamma-rays        C:-Beta rays        D:-X-rays
Ans: C

6:-Risk of relapse of stage I seminoma after high inguinal radical orchidectomy is
A:-10%        B:-20%        C:-30%        D:-40%
Ans: B

7:-What is the dose limit for whole body of a radiation worker ?
A:-1 mSv/year        B:-10 mSv/year        C:-20 mSv/year        D:-30 mSv/year
Ans: C

8:-Which of the following gene(s) is/are associated with hereditary breast cancer ?
A:-BRCA1/BRCA2        B:-CHECK2
C:-PALB2        D:-All of the above
Ans: D

9:-Nobel prize for the discovery of cell cycle was received by all except
A:-H. Hartwell        B:-Timothy Hunt        C:-Zetterberg        D:-Paul M. Nurse
Ans: C

10:-Gamma ray energy related to cobalt 60 radiosotope
A:-1.25 MeV        B:-1.17 MeV        C:-1.33 MeV        D:-All of the above
Ans: D

11:-Which of the following statements regarding lobular carcinoma in situ (LCIS) is wrong ?
A:-LCIS cells are commonly ER negative
B:-LCIS has been reported to present with a multi centric distribution in upto 90% of the mastectomy specimen
C:-Loss of E cadherin is often observed
D:-Represents <15% of all noninvasive breast cancer
Ans: A

12:-Type of asbestosfibers with highest risk of malignant pleural mesothelioma
A:-Chrysotile        B:-Amphibole        C:-Cribriform        D:-Cruciate
Ans: B

13:-Normal tissue tolerance dose of heart with conventional fractionation radiation treatment is
A:-No more than 1/3 of heart volume to receive 20 Gy        B:-No more then 1/3 of heart volume to receive 40 Gy
C:-No more than 1/3 of heart volume to receive 60 Gy        D:-No more than 1/3 of heart volume to receive 80 Gy
Ans: C

14:-Most common origin for cardiac metastasis is
A:-Upper gastro intestinal tract        B:-Breast        C:-Lung        D:-Melanoma
Ans: C

15:-A nucleus remains stable as Z(proton number) increases when
A:-no. of neutrons > no. of protons        B:-no. of protons > no. of neutrons
C:-no. of protons = no. of neutrons        D:-none of the above
Ans: A

16:-In `90_(Sr-)` `90_(Y)` beta ray applicator, the parent and daughter nuclei are in
A:-Transient equilibrium        B:-Secular equilibrium        C:-Relative equilibrium        D:-Not in equilibrium
Ans: B

17:-Compton interaction depends up on
A:-Photon energy and electron density of the medium        B:-Z and the electron density of the medium
C:-Photon energy and Z of the medium        D:-Z and free electron energy level of the medium
Ans: A

18:-In build up region for high energy photon beams
A:-Energy transferred increases        B:-Energy absorbed increases
C:-Energy absorbed decreases        D:-Energy transferred is equal to energy absorbed
Ans: B

19:-The calculation parameters which we used for the SSD set up treatments are
A:-PDD and the dose rate in air at Isocentre        B:-TMR and the dose rate in air at Isocentre
C:-PDD and the dose rate in water at `d_(max)`        D:-TMR and dose rate in water at `d_(max)`
Ans: C

20:-The unit of integral dose is
A:-Joule/Kg        B:-Coulomb/Kg        C:-Joule Kg        D:-Joule
Ans: D

21:-Radiation Field size is defined as the
A:-Lateral distance between the collimator opening
B:-Lateral distance between the optical field edges
C:-Lateral distance between the 90% Isodose line at reference depth
D:-Lateral distance between 50% Isodose line at reference depth
Ans: D

22:-Radiation weighting factor is same for
A:-Photons and electrons        B:-Neutrons and photons        C:-Thermal neutrons and protons        D:-None of the above
Ans: A

23:-Using TLD personal monitoring system we can detect
A:-Only photons        B:-Only electrons        C:-Photons and electrons        D:-Photons, electrons and neutrons
Ans: C

24:-The filters used with Mega Voltage x-rays is for
A:-Removing unwanted soft X rays        B:-Making the intensity uniform across the beam
C:-Removing the horns across the beam        D:-All of the above
Ans: B

RADIOTHERAPHY- PAGE 6

RADIOTHERAPHY MCQs- PAGE 6

UPSC Study Materials​MCQs for Competitive Examinations

UPSC Study Materials
MCQs for Competitive Examinations