Radiation Quantities and Units Ch 1

Question 1

Which of the following is not a unit of energy:
A. Heat Unit
B. MeV
C. Watt
D. Joule

Answer 1

C. Watt

Question 2

If the muscle tissue is exposed to 50 roentgens of x-rays, this would produce an
approximate dose of:
A. 50 rad
B. 50 Gy
C. 50 sievert
D. 50 becquere

Answer 2

A. 50 rad

Question 3

A gray is equal to:
A. 10 roentgen
B. 100 rad
C. 1000 rad
D. 1 Ci

Answer 3

B. 100 rad

Question 4

1 curie is equal to:
A. 106 becquerel
B. 103 becquerel
C. 3.7 x 1010 becquerel
D. 37 becquerel

Answer 4

C. 3.7 x 1010 becquerel

Question 5

If a charge of 10 coulomb passes through a meter in 2 seconds, the current is:
A. 20 amps
B. 5 amps
C. 10 amps
D. 8 amps

Answer 5

B. 5 amps

Question 6

In the following, match the quantity with the corresponding unit:
A. Rad
B. Ci
C. Roentgens
D. MeV

a. Electron Beam energy
b. Exposure
c. Absorbed dose
d. Radioactivity

Answer 6

A. Rad c. Absorbed dose
B. Ci d. Radioactivity
C. Roentgens b. Exposure
D. MeV a. Electron Beam energy

Question 7

Which of the following is not a unit of energy:
A. Rad
B. cGy
C. Volt
D. Joules

Answer 7

C. Volt

Question 8

Which of the following is not an SI unit:
A. Kilogram
B. Meter
C. Ci
D. Second

Answer 8

C. Ci

Question 9

Match the following units with the quantity:
A. Hz
B. Amp
C. Angstrom
D. Coulomb
E. kV

a. Wavelength
b. Frequency
c. Charge
d. Current
e. Tube potential

Answer 9

A. Hz b. Frequency
B. Amp d. Current
C. Angstrom a. Wavelength
D. Coulomb c. Charge
E. kV e. Tube potential

Question 10

A monitor unit in a linac usually represents an absorbed dose of:
A. 1 Gy
B. 0.01 Gy
C. 100 Gy
D. 0.1 Gy

Answer 10

B. 0.01 Gy

Question 11

A picocurie is equal to:
A. 0.1 Ci
B. 0.001 Ci
C. 10-6 Ci
D. 10-9 Ci
E. 10-12 Ci

Answer 11

E. 10-12 Ci

Question 12

Nanocoulomb is equal to:
A. 10-3 coulomb
B. 10-6 coulomb
C. 10-9 coulomb
D. 10-12 coulomb

Answer 12

C. 10-9 coulomb