MDRAO Chapter 6 – Part 3 – Medical Dosage and Administration – 2026 – Study
and Practice Guide
MECHANICAL WASHERS TESTED FOR CLEANING ABILITY - correct answer ✔✔ DAILY
MECHANICAL WASHERS TEMP TESTED - correct answer ✔✔ WEEKLY
T/F: All devices can go into mechanical washers - correct answer ✔✔ FALSE
TYPES OF MECHANICAL WASHERS - correct answer ✔✔ WASHER-DISINFECTORS, ULTRASONIC
CLEANERS, CART WASHERS, PASTEURMATICS
WASHER-DISINFECTORS HOT WATER - correct answer ✔✔ 80-93 C from 1-10 minutes
WASHER-DISINFECTORS - correct answer ✔✔ PROVIDE LOW-INTERMEDIATE DISINFECTION
WASHER-DISINFECTOR PRE-RINSE - correct answer ✔✔ COLD WATER; REHYDRATES BLOOD,
REMOVES SOIL
WASHER-DISINFECTOR DETERGENT - correct answer ✔✔ LOW-SUDSING, RINSE-FREE SOL'N
INDEX WASHERS - correct answer ✔✔ DISINFECTIORS WITH ULTRASONIC IN THEM
WASHER-DISINFECTOR - correct answer ✔✔ USED MAINLY FOR SURGICAL INSTR. LARGE
STAINLESS STEEL ITEMS, BEDPANS
, WASHER-DISINFECTORS DAILY CHECK - correct answer ✔✔ detergent levels, drain filter, spray
arms, riser valves, computer op + supplies, racks for specialty devices
T/F: Too much detergent in washer-disinfectors will cause locks to corrode and stiffen - correct
answer ✔✔ TRUE
T/F: Instruments must be in the closed position before going into the washer disinfector -
correct answer ✔✔ FALSE
T/F: Instruments must be disassembled before going into washer disinfector - correct answer
✔✔ TRUE
ULTRASONIC CLEANER - correct answer ✔✔ uses sound waves in process called cavitation
ULTRASONIC CLEANER - correct answer ✔✔ Stainless steel tank filled w/ water + detergent
ULTRASONIC CLEANER - correct answer ✔✔ Used to remove soil from crevices, joints, lumens,
and difficult to clean and delicate devices
CAVITATION - correct answer ✔✔ Mechanical energy; electrical current converted to sound
waves that creates tiny bubbles
OPTIMUM TEMP FOR ULTRASONIC CLEANER - correct answer ✔✔ 27-430 C (80-110 F)
ULTRASONIC CLEANER CLEANING TIME - correct answer ✔✔ 2-10 MINS
T/F: Instruments after ultrasonic clean still need to be rinsed and disinfected. - correct answer
✔✔ TRUE
and Practice Guide
MECHANICAL WASHERS TESTED FOR CLEANING ABILITY - correct answer ✔✔ DAILY
MECHANICAL WASHERS TEMP TESTED - correct answer ✔✔ WEEKLY
T/F: All devices can go into mechanical washers - correct answer ✔✔ FALSE
TYPES OF MECHANICAL WASHERS - correct answer ✔✔ WASHER-DISINFECTORS, ULTRASONIC
CLEANERS, CART WASHERS, PASTEURMATICS
WASHER-DISINFECTORS HOT WATER - correct answer ✔✔ 80-93 C from 1-10 minutes
WASHER-DISINFECTORS - correct answer ✔✔ PROVIDE LOW-INTERMEDIATE DISINFECTION
WASHER-DISINFECTOR PRE-RINSE - correct answer ✔✔ COLD WATER; REHYDRATES BLOOD,
REMOVES SOIL
WASHER-DISINFECTOR DETERGENT - correct answer ✔✔ LOW-SUDSING, RINSE-FREE SOL'N
INDEX WASHERS - correct answer ✔✔ DISINFECTIORS WITH ULTRASONIC IN THEM
WASHER-DISINFECTOR - correct answer ✔✔ USED MAINLY FOR SURGICAL INSTR. LARGE
STAINLESS STEEL ITEMS, BEDPANS
, WASHER-DISINFECTORS DAILY CHECK - correct answer ✔✔ detergent levels, drain filter, spray
arms, riser valves, computer op + supplies, racks for specialty devices
T/F: Too much detergent in washer-disinfectors will cause locks to corrode and stiffen - correct
answer ✔✔ TRUE
T/F: Instruments must be in the closed position before going into the washer disinfector -
correct answer ✔✔ FALSE
T/F: Instruments must be disassembled before going into washer disinfector - correct answer
✔✔ TRUE
ULTRASONIC CLEANER - correct answer ✔✔ uses sound waves in process called cavitation
ULTRASONIC CLEANER - correct answer ✔✔ Stainless steel tank filled w/ water + detergent
ULTRASONIC CLEANER - correct answer ✔✔ Used to remove soil from crevices, joints, lumens,
and difficult to clean and delicate devices
CAVITATION - correct answer ✔✔ Mechanical energy; electrical current converted to sound
waves that creates tiny bubbles
OPTIMUM TEMP FOR ULTRASONIC CLEANER - correct answer ✔✔ 27-430 C (80-110 F)
ULTRASONIC CLEANER CLEANING TIME - correct answer ✔✔ 2-10 MINS
T/F: Instruments after ultrasonic clean still need to be rinsed and disinfected. - correct answer
✔✔ TRUE
