FRCR Part 1 MCQS - SET ONE

MCQS SET ONE - RADIATION HAZARDS & PROTECTION


1. Regarding radiation units, the following are true :
A) Effective dose is the absorbed dose multiplied by a radiation weighting factor
B) Equivalent dose is the sum of weighted effective doses for all the exposed tissues
C) Occupational exposure is measured in terms of absorbed dose ( Rads)
D) The weighting factor for alpha particles is 20
E) The units of equivalent dose are J/Kg

Answers:
A) False- equivalent dose
B) false – effective dose
C) false, Sv- effective dose
D) true
E) true

Q2. Which of the following are true :
A) Definite threshold exists for deterministic effects
B) Severity of stochastic effects are dose related
C) Radiation related cancers are examples of stochastic effect
D) Growth retardation in a fetus is a stochastic effect
E) Recommended dose limits are devised with relation to deterministic effects

Answers :
A) true
B) false
C) true
D) false
E) true

Q3. Regarding current recommended dose limits, the following are true
A) Annual effective dose limit for occupational workers is 50 mSv
B) For pregnant workers, total dose to abdomen should not exceed 2mSv during entire duration of pregnancy
C) Annual equivalent dose for skin for patients should not exceed 50mSv
D) Annual effective dose limit for public is 1 mSv
E) Annual effective dose limit for trainees is 15 mSv

Answers :
A) false, 20 mSv
B) true
C) false, no recommended limits for patients
D) true
E) true

Q4. What is true regarding radiation workers ?
A) Classified workers includes those workers who are likely to exceed 20 % of any of the annual dose limits
B) Records of classified workers are maintained for a period of 30 years after the last entry
C) An operator is authorized to inject radiopharmaceutical without any guidance
D) All radiation personnel in a controlled area should wear personal dosimeters
E) All radiation personnel working in a controlled area are classified workers

Answers :
A) false, 30%
B) false, 50 years
C) false, under guidance of practitioner
D) true
E) false

Q5. Medical surveillance is required in
A) Anyone whom employer intends to designate as classified person
B) Classified persons
C) Breast feeding personnel
D) Trainees
E) Received an over exposure and is not a classified person

Answers :
A) true
B) true
C) f alse
D) false
E) true

Q6. Regarding radiation hazards, the following are true
A) Threshold for hemopoietic syndrome is 1 Sv
B) Threshold for cataract is 1 Sv
C) The risk for congenital malformations is maximum when the fetus is exposed to radiation at a period of 8 – 28 weeks following conception
D) The first 3 weeks after conception are a relatively safe period with respect to irradiation in utero
E) LD50/30 is 10 mSv for humans

Answers :
A) true
B) false , 4 Sv
C) false , 3- 8 weeks
D) true
E) false, 5 mSv , 10 mSv – 100% lethality

Q7. Regarding IRR 2000, the following are true
A) A nurse can be an operator
B) Justifying an exposure is the primary responsibility of the operator
C) The responsibility of establishing diagnostic reference levels for standard examinations lies with the medical physics expert ( MPE)
D) Dose limits for persons undergoing medical examination have been recommended in IRR 2000
E) Referrers are not required for exposures which are a part of a national screening programme

Answers ;
A) true
B) false, practitioner
C) false, employer
D) false, no recommended dose limits
E) true

Q 8 . Regarding radiation monitoring devices,
A) Alpha particles are not detected by a film badge
B) Film badge measures both dose and dose rate
C) Film badges are calibrated by exposing some badges to known quantities of X rays
D) A Geiger counter is more sensitive than an air equivalent wall ionisation chamber
E)Geiger counter can differentiate between different types of radiation

Answers :
A) true
B) false
C) false
D) true
E) false