Worksheet 1-4

What unit results when a coulomb is divided by a second? a. Ampere b. Hertz c. Ohm d. Rad e. Volt

A

Which of the following is a unit of electric potential? a. Joule b. kVp c. mA d. mAs e. Newton

B

Which of the following is a unit of energy? a. Gray b. Joule c. Newton d. Rad e. Sievert

B

The fundamental unit of force is the: a. Coulomb b. Joule c. Newton d. Roentgen e. Volt

C

The radiologic unit milliampere-second (mAs) is actually a measure of: a. Electric charge b. Electric potential c. Number of electrons d. Potential difference e. X-ray intensity

C

What common radiologic unit results from the following? millicoulomb X second = a. ESE b. kVp c. mA d. PBL e. SID

C

Which of the following has units of s^-1? a. Dose b. Exposure c. Frequency d. Time e. Velocity

C

Which of the following is an SI-derived unit? a. Dyne b. Horsepower c. Joule d. Kelvin e. Roentgen

C

Which of the following is not a base quantity in the SI? a. Electric current b. Mass c. Radiation exposure d. Temperature e. Time

C

Which of the following is not a system of units? a. British b. CGS c. French d. MKS e. SI

C

A kilogram is the: a. Energy required to raise 1 lb of water 1°C b. Mass of a standard gold bar c. Mass of 1 lb of water d. Mass of 1000 cm3 of water e. Temperature rise of 1 lb of water

D

SI stands for which of the following? a. Inconsistent system b. Incorrect system c. Le Système Institutional d. Le Système International d'Unités e. System International

D

Water has a mass density of 1 g/cm3. Its density is also: a. 1023 kg/m3 b. 1 kg/m3 c. 10 kg/m3 d. 103 kg/m3 e. 105 kg/m3

D

The unit of measure that is the same for all systems of measure is the: a. Calorie b. Kilogram c. Meter d. Pound e. Second

E

Which of the following is an SI base unit? a. Becquerel b. Coulomb c. Coulomb/kilogram d. Gray e. Kilogram

E

Which of the following is an SI name for a base unit? a. Celsius b. Kilovolt c. Milliampere d. Newton e. Second

E

Which of the following is expressed in the proper units? a. Absorbed dose: Sv b. Activity: rem c. Dose equivalent: rad d. Exposure: Bq e. Exposure: mGya

E

Which of the following standards of SI measure is correct? a. The foot was measured by King Henry VIII. b. The meter is related to the visible emission from the sun. c. The meter is the length of an engraved platinum- iridium bar. d. The second is based on the rotation of the earth around the sun. e. The second is based on the vibrations of cesium atoms.

E