NBDHE Study Exam Questions and
Answers 100% Pass
What are the conditions for chemical sterilization? - ANSWER-273 F @ 25psi for
20 mins
*may damage rubber and plastic*
What are the conditions for dry sterilization? - ANSWER-340 F for 1 hr
320 F for 2 hrs
*avoid paper products, may damage rubber and plastic*
What are the conditions for steam sterilization? - ANSWER-250 F @ 15 or 20 lbs
psi for 30 mins
*corrodes nonstainless steel, dulls instruments, paper packages come out wet*
What spore test is used for chemical sterilization? - ANSWER-Geobacillus
stearothermophilus
What spore test is used for dry sterilization? - ANSWER-Bacillus atrophaeus
What spore test is used for steam sterilization? - ANSWER-Geobacillus
stearothermophilus
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,What type of sterilization may damage rubber and plastic items? - ANSWER-
Chemical and dry
What type of sterilization is recommended for metal instruments? - ANSWER-Dry
What ASA is a normal, healthy patient; no apparent disease is evident; requires no
dental management modifications? - ANSWER-ASA I
What ASA is a patient with mild systemic disease; may or may not need dental
management modifications? - ANSWER-ASA II
What ASA is a patient with moderate-to-severe systemic disease, but not
incapacitating; may have drug concerns and require special care will most likely
require dental management modifications? - ANSWER-ASA III
What ASA is a patient with severe systemic disease that is incapacitating and life
threatening; requires dental treatment modifications, often in a special facility? -
ANSWER-ASA IV
What is the normal respiratory rate for an infant? - ANSWER-30-60 rpm
What is the normal respiratory rate for a child? - ANSWER-14-26 rpm
What is the normal respiratory rate for adults? - ANSWER-12-20 rpm
What is the normal heart rate for infants? - ANSWER-100-160 bpm
What is the normal heart rate for children? - ANSWER-70-120 bpm
What is the normal heart rate for adolescents/adults? - ANSWER-60-100 bpm
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,What is the normal heart rate for well trained athletes? - ANSWER-45-60 bpm
What ASA category is a person with well controlled asthma, epilepsy? - ANSWER-
ASA II
What ASA category is a person with stage I hypertension? - ANSWER-ASA II
What ASA category is a person with stage II hypertension? - ANSWER-ASA III
What ASA category is a person with CHF? - ANSWER-ASA III
What ASA category is a person with AIDS? - ANSWER-ASA III
What ASA category is a person with chronic COPD? - ANSWER-ASA III
What ASA category is a person with severe CHF or COPD? - ANSWER-ASA IV
What ASA category is a person with kidney or liver failure? - ANSWER-ASA IV
Blood pressure of 120/80-139/89 is considered what? - ANSWER-
Prehypertension
Blood pressure of 140/90-159/99 is considered what? - ANSWER-Stage I
hypertension
Blood pressure of greater than 160/100? - ANSWER-Stage II hypertension
Maxillary canine occludes with the distal half of the mandibular canine and the
mesial half of the mandibular first premolar, what angles class is this? - ANSWER-
Class I
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, Distal portion of the maxillary canine is mesial to the mesial portion of the
mandibular canine by at least the width of a premolar, what angles class is this? -
ANSWER-Class II
Mesial portion of the maxillary canine is distal to the distal surface of the
mandibular canine by the width of a premolar, what angles class is this? -
ANSWER-Class III
What is the nutrient source for supragingival calculus? - ANSWER-Saliva
What is the nutrient source for subgingival calculus? - ANSWER-Crevicular fluid
and inflammatory exudate
What type of explorers can be used for calculus detection for posteriors? -
ANSWER-11/12 and pigtail
What type of explorers can be used for calculus detection of anteriors and cervical
1/3s of posteriors? - ANSWER-orban-type
What type of stain is associated with iron, insoluble ferric sulfide and gram-positive
bacteria; typically located on cervical 1/3 of facials and linguals? - ANSWER-Black
What type of stain is associated from inhaling metallic dust--most likely from an
occupational exposure? - ANSWER-Bluish-green
What type of stain is associated with poor oral hygiene and/or drinking dark-
colored beverages? - ANSWER-Brown
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Answers 100% Pass
What are the conditions for chemical sterilization? - ANSWER-273 F @ 25psi for
20 mins
*may damage rubber and plastic*
What are the conditions for dry sterilization? - ANSWER-340 F for 1 hr
320 F for 2 hrs
*avoid paper products, may damage rubber and plastic*
What are the conditions for steam sterilization? - ANSWER-250 F @ 15 or 20 lbs
psi for 30 mins
*corrodes nonstainless steel, dulls instruments, paper packages come out wet*
What spore test is used for chemical sterilization? - ANSWER-Geobacillus
stearothermophilus
What spore test is used for dry sterilization? - ANSWER-Bacillus atrophaeus
What spore test is used for steam sterilization? - ANSWER-Geobacillus
stearothermophilus
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 1
,What type of sterilization may damage rubber and plastic items? - ANSWER-
Chemical and dry
What type of sterilization is recommended for metal instruments? - ANSWER-Dry
What ASA is a normal, healthy patient; no apparent disease is evident; requires no
dental management modifications? - ANSWER-ASA I
What ASA is a patient with mild systemic disease; may or may not need dental
management modifications? - ANSWER-ASA II
What ASA is a patient with moderate-to-severe systemic disease, but not
incapacitating; may have drug concerns and require special care will most likely
require dental management modifications? - ANSWER-ASA III
What ASA is a patient with severe systemic disease that is incapacitating and life
threatening; requires dental treatment modifications, often in a special facility? -
ANSWER-ASA IV
What is the normal respiratory rate for an infant? - ANSWER-30-60 rpm
What is the normal respiratory rate for a child? - ANSWER-14-26 rpm
What is the normal respiratory rate for adults? - ANSWER-12-20 rpm
What is the normal heart rate for infants? - ANSWER-100-160 bpm
What is the normal heart rate for children? - ANSWER-70-120 bpm
What is the normal heart rate for adolescents/adults? - ANSWER-60-100 bpm
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 2
,What is the normal heart rate for well trained athletes? - ANSWER-45-60 bpm
What ASA category is a person with well controlled asthma, epilepsy? - ANSWER-
ASA II
What ASA category is a person with stage I hypertension? - ANSWER-ASA II
What ASA category is a person with stage II hypertension? - ANSWER-ASA III
What ASA category is a person with CHF? - ANSWER-ASA III
What ASA category is a person with AIDS? - ANSWER-ASA III
What ASA category is a person with chronic COPD? - ANSWER-ASA III
What ASA category is a person with severe CHF or COPD? - ANSWER-ASA IV
What ASA category is a person with kidney or liver failure? - ANSWER-ASA IV
Blood pressure of 120/80-139/89 is considered what? - ANSWER-
Prehypertension
Blood pressure of 140/90-159/99 is considered what? - ANSWER-Stage I
hypertension
Blood pressure of greater than 160/100? - ANSWER-Stage II hypertension
Maxillary canine occludes with the distal half of the mandibular canine and the
mesial half of the mandibular first premolar, what angles class is this? - ANSWER-
Class I
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 3
, Distal portion of the maxillary canine is mesial to the mesial portion of the
mandibular canine by at least the width of a premolar, what angles class is this? -
ANSWER-Class II
Mesial portion of the maxillary canine is distal to the distal surface of the
mandibular canine by the width of a premolar, what angles class is this? -
ANSWER-Class III
What is the nutrient source for supragingival calculus? - ANSWER-Saliva
What is the nutrient source for subgingival calculus? - ANSWER-Crevicular fluid
and inflammatory exudate
What type of explorers can be used for calculus detection for posteriors? -
ANSWER-11/12 and pigtail
What type of explorers can be used for calculus detection of anteriors and cervical
1/3s of posteriors? - ANSWER-orban-type
What type of stain is associated with iron, insoluble ferric sulfide and gram-positive
bacteria; typically located on cervical 1/3 of facials and linguals? - ANSWER-Black
What type of stain is associated from inhaling metallic dust--most likely from an
occupational exposure? - ANSWER-Bluish-green
What type of stain is associated with poor oral hygiene and/or drinking dark-
colored beverages? - ANSWER-Brown
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 4
