Water Operator Certification Study Material ( New
Mexico) (Basic) exam Questions and answers Newest
RATED A+
Maximum Contaminent Level - CORRECT ANSWERS MCL
Public water system is a system that serves a population of or more regularly - CORRECT
ANSWERS 25
Maximum total chlorine residual mg/l - CORRECT ANSWERS 4
What type of contaminant is Iron - CORRECT ANSWERS Secondary
Primary contaminant is sometimes added to water supplies to prevent tooth decay - CORRECT
ANSWERS Fluoride
The Failure of a public water system to comply with the NM Drinking Water Regulations must
be reported to NMED within hours - CORRECT ANSWERS 48
MCL for Total Trihalomethanes mg/l - CORRECT ANSWERS 0.1
SDWA sampling results must be reported to - CORRECT ANSWERS New Mexico Enviroment
Department (NMED)
Ground water systems must sample for inorganic chemicals every years - CORRECT
ANSWERS 3
,The SDWA Compliance Cycle for Standardized Monitoring Rule consists of Compliance
Periods - CORRECT ANSWERS 3
or less than 5% bacteriological samples must be taken every month before a system is
allowed to have TWO positive samples without violating the drinking water standard? -
CORRECT ANSWERS 40
Action level for Lead mg/l - CORRECT ANSWERS 0.015
If Bacteriological retakes are done this month what is the minimum number of samples that
must be turned in next month? - CORRECT ANSWERS 5
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and
still meet requirements - CORRECT ANSWERS 0.1
Primary Inorganic Contaminant poses an immediate health risk - CORRECT ANSWERS Nitrates
The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a
blue tint - CORRECT ANSWERS Blue Baby Syndrome
Primary Contaminant that shields harmful bacteria from disinfection processes - CORRECT
ANSWERS Turbidity
Device used to measure NTU's - CORRECT ANSWERS Nephelometer
Turbidity is Measured with - CORRECT ANSWERS Turbidimeter or Nephelometer
Chemical sampling results be kept years - CORRECT ANSWERS 10
, Bacteriological sampling results be kept years - CORRECT ANSWERS 5
Microorganisms whose presence in water indicates probable presence of pathogens. -
CORRECT ANSWERS Indicator organism
White powder used to neutralize chlorine - CORRECT ANSWERS Sodium Thiosulphate
To insure the water being sampled is from the main and not the customers plumbling -
CORRECT ANSWERS Flush line
Number is used to determine how many Bac-t samples must be taken - CORRECT ANSWERS
People served
Minimum number of Bac-T samples required each month? - CORRECT ANSWERS 1
Anytime the MCL is exceeded and fecal coliform positive results come back from any of the
samples - CORRECT ANSWERS Non-acute violation
If retakes are required this month what is the minimum number of samples required next
month - CORRECT ANSWERS 5
Bacteria that are found only in surface water supplies - CORRECT ANSWERS Cryptosporidium
& Giardia
How soon must NMED be notified that a Bacterial MCL has been exceeded? hours -
CORRECT ANSWERS 24
Mexico) (Basic) exam Questions and answers Newest
RATED A+
Maximum Contaminent Level - CORRECT ANSWERS MCL
Public water system is a system that serves a population of or more regularly - CORRECT
ANSWERS 25
Maximum total chlorine residual mg/l - CORRECT ANSWERS 4
What type of contaminant is Iron - CORRECT ANSWERS Secondary
Primary contaminant is sometimes added to water supplies to prevent tooth decay - CORRECT
ANSWERS Fluoride
The Failure of a public water system to comply with the NM Drinking Water Regulations must
be reported to NMED within hours - CORRECT ANSWERS 48
MCL for Total Trihalomethanes mg/l - CORRECT ANSWERS 0.1
SDWA sampling results must be reported to - CORRECT ANSWERS New Mexico Enviroment
Department (NMED)
Ground water systems must sample for inorganic chemicals every years - CORRECT
ANSWERS 3
,The SDWA Compliance Cycle for Standardized Monitoring Rule consists of Compliance
Periods - CORRECT ANSWERS 3
or less than 5% bacteriological samples must be taken every month before a system is
allowed to have TWO positive samples without violating the drinking water standard? -
CORRECT ANSWERS 40
Action level for Lead mg/l - CORRECT ANSWERS 0.015
If Bacteriological retakes are done this month what is the minimum number of samples that
must be turned in next month? - CORRECT ANSWERS 5
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and
still meet requirements - CORRECT ANSWERS 0.1
Primary Inorganic Contaminant poses an immediate health risk - CORRECT ANSWERS Nitrates
The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a
blue tint - CORRECT ANSWERS Blue Baby Syndrome
Primary Contaminant that shields harmful bacteria from disinfection processes - CORRECT
ANSWERS Turbidity
Device used to measure NTU's - CORRECT ANSWERS Nephelometer
Turbidity is Measured with - CORRECT ANSWERS Turbidimeter or Nephelometer
Chemical sampling results be kept years - CORRECT ANSWERS 10
, Bacteriological sampling results be kept years - CORRECT ANSWERS 5
Microorganisms whose presence in water indicates probable presence of pathogens. -
CORRECT ANSWERS Indicator organism
White powder used to neutralize chlorine - CORRECT ANSWERS Sodium Thiosulphate
To insure the water being sampled is from the main and not the customers plumbling -
CORRECT ANSWERS Flush line
Number is used to determine how many Bac-t samples must be taken - CORRECT ANSWERS
People served
Minimum number of Bac-T samples required each month? - CORRECT ANSWERS 1
Anytime the MCL is exceeded and fecal coliform positive results come back from any of the
samples - CORRECT ANSWERS Non-acute violation
If retakes are required this month what is the minimum number of samples required next
month - CORRECT ANSWERS 5
Bacteria that are found only in surface water supplies - CORRECT ANSWERS Cryptosporidium
& Giardia
How soon must NMED be notified that a Bacterial MCL has been exceeded? hours -
CORRECT ANSWERS 24
