Question19:-The *105*(th)* Indian Science Congress was held in 2018 at
A:-Bhuvaneswar
B:-Bangaluru
C:-Bhopal
D:-Imphal
Correct Answer:- Option-D
Question20:-The winner of J. C. Danil Award 2017
A:-Adoor Gopalakrishnan
B:-Sree Kumaran Thanpi
C:-M. K. Arjunam
D:-K. G. George
Correct Answer:- Option-B
Question21:-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
Correct Answer:- Option-A
Question22:-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
Correct Answer:- Option-B
Question23:-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
Correct Answer:- Option-A
Question24:-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
Correct Answer:- Option-B
Question25:-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)*
Correct Answer:- Option-C
Question26:-The unit of integral dose is
A:-Joule/Kg
B:-Coulomb/Kg
C:-Joule Kg
D:-Joule
Correct Answer:- Option-D
Question27:-Radiation Field size is defined as the
A:-Lateral distance between the collimator opening
B:-Lateral distance between the optical field edges
:-Lateral distance between the 90% Isodose line at reference depth
D:-Lateral distance between 50% Isodose line at reference depth
Correct Answer:- Option-D
Question28:-Radiation weighting factor is same for
A:-Photons and electrons
B:-Neutrons and photons
C:-Thermal neutrons and protons
D:-None of the above