Page 1 of 59
WDI EXAM QUESTIONS AND CORRECT DETAILED
SOLUTIONS LATEST UPDATED VERSION JUST
RELEASED
Question: What physical characteristic visually distinguishes carpenter bees from
bumble bees? - ANSWER✔✔Carpenter bees have hairless abdomens (butts)
Question: What works better to deter carpenter bees - wood stain or latex paint? -
ANSWER✔✔Latex paint
Question: What is the size of the entrance/hole to a carpenter bee nest? - ANSWER✔✔1/2"
diameter
Question: What caste of wood boring beetle does the most damage? - ANSWER✔✔Larvae
Question: How long is the life cycle of most powderpost beetles? - ANSWER✔✔One year
, Page 2 of 59
Question: T/F : You must have a TDA license to perform structural pest control, regardless of
the pesticides used. - ANSWER✔✔True
Question: What does the acronym "TDA" stand for? - ANSWER✔✔Texas Department of
Agriculture
Question: What does the acronym "SPCS" stand for? - ANSWER✔✔Structural Pest Control
Service
Question: What does the acronym "TCEQ" stand for? - ANSWER✔✔Texas Commission for
Environmental Quality
Question: What does the acronym "EPA" stand for? - ANSWER✔✔Environmental Protection
Agency
, Page 3 of 59
Question: Name the 2 state agencies responsible for applicator certification and training -
ANSWER✔✔TDA, SPCS
Q:In order of severity, what are the 3 signal words/terms found on pesticide labels which
indicate a pesticide's risk/deadliness to humans? - ANSWER✔✔Caution, Warning, Danger
Question: Using barriers to prevent pests from getting into an area is an example of which type
of pest management method? - ANSWER✔✔Mechanical
Question: *** What does LD50 indicate? - ANSWER✔✔Lethal dose to 50% of test subjects
Question: The routes of entry statement "Extremely hazardous by skin contact- rapidly
absorbed theough the skin." on a label would most likely carry which signal word? -
ANSWER✔✔Danger
Question: Which signal word/term is associated with very low oral LD50 values? -
ANSWER✔✔Danger - Poison
, Page 4 of 59
Question: How often should work clothes worn to apply pesticides be laundered with a
suitable detergent? - ANSWER✔✔After each day's use
Question: Determining when to apply a pesticide includes considering the ____ of the pest, as
well as the ____ conditions. - ANSWER✔✔Life cycle, Weather
Question: Which application method involves uniformly applying a pesticide to an entire area
or field? - ANSWER✔✔Broadcast
Question: Which dry/solid formulation is mixed in water and reduces the risk of inhalation
exposure dring mixing and loading? - ANSWER✔✔Wettable powder (WP)
Question: What time of day should a pesticide be applied to best protect bees from pesticide
injury? - ANSWER✔✔In the evening, or at night
Question: How many types of termites are inspected for? - ANSWER✔✔3
WDI EXAM QUESTIONS AND CORRECT DETAILED
SOLUTIONS LATEST UPDATED VERSION JUST
RELEASED
Question: What physical characteristic visually distinguishes carpenter bees from
bumble bees? - ANSWER✔✔Carpenter bees have hairless abdomens (butts)
Question: What works better to deter carpenter bees - wood stain or latex paint? -
ANSWER✔✔Latex paint
Question: What is the size of the entrance/hole to a carpenter bee nest? - ANSWER✔✔1/2"
diameter
Question: What caste of wood boring beetle does the most damage? - ANSWER✔✔Larvae
Question: How long is the life cycle of most powderpost beetles? - ANSWER✔✔One year
, Page 2 of 59
Question: T/F : You must have a TDA license to perform structural pest control, regardless of
the pesticides used. - ANSWER✔✔True
Question: What does the acronym "TDA" stand for? - ANSWER✔✔Texas Department of
Agriculture
Question: What does the acronym "SPCS" stand for? - ANSWER✔✔Structural Pest Control
Service
Question: What does the acronym "TCEQ" stand for? - ANSWER✔✔Texas Commission for
Environmental Quality
Question: What does the acronym "EPA" stand for? - ANSWER✔✔Environmental Protection
Agency
, Page 3 of 59
Question: Name the 2 state agencies responsible for applicator certification and training -
ANSWER✔✔TDA, SPCS
Q:In order of severity, what are the 3 signal words/terms found on pesticide labels which
indicate a pesticide's risk/deadliness to humans? - ANSWER✔✔Caution, Warning, Danger
Question: Using barriers to prevent pests from getting into an area is an example of which type
of pest management method? - ANSWER✔✔Mechanical
Question: *** What does LD50 indicate? - ANSWER✔✔Lethal dose to 50% of test subjects
Question: The routes of entry statement "Extremely hazardous by skin contact- rapidly
absorbed theough the skin." on a label would most likely carry which signal word? -
ANSWER✔✔Danger
Question: Which signal word/term is associated with very low oral LD50 values? -
ANSWER✔✔Danger - Poison
, Page 4 of 59
Question: How often should work clothes worn to apply pesticides be laundered with a
suitable detergent? - ANSWER✔✔After each day's use
Question: Determining when to apply a pesticide includes considering the ____ of the pest, as
well as the ____ conditions. - ANSWER✔✔Life cycle, Weather
Question: Which application method involves uniformly applying a pesticide to an entire area
or field? - ANSWER✔✔Broadcast
Question: Which dry/solid formulation is mixed in water and reduces the risk of inhalation
exposure dring mixing and loading? - ANSWER✔✔Wettable powder (WP)
Question: What time of day should a pesticide be applied to best protect bees from pesticide
injury? - ANSWER✔✔In the evening, or at night
Question: How many types of termites are inspected for? - ANSWER✔✔3
