Exploring

Correct!
Air is capable of holding more water vapor at higher temperatures, so if the absolute amount of water vapor in the air remains the same, the relative humidity will go down when the temperature is raised, and it will go up when the temperature is lowered.

Wrong: The answer is C or D.
Air is capable of holding more water vapor at higher temperatures, so if the absolute amount of water vapor in the air remains the same, the relative humidity will go down when the temperature is raised, and it will go up when the temperature is lowered.

Correct!
Stack areas that are closed to staff/patrons except for retrieval of materials should be kept slightly colder than areas where staff/patrons use collections. Maintenance of very low storage temperatures is difficult and expensive, and should be reserved for vulnerable collections that are accessed very infrequently.

Wrong: The answer is B.
Stack areas that are closed to staff/patrons except for retrieval of materials should be kept slightly colder than areas where staff/patrons use collections. Maintenance of very low storage temperatures is difficult and expensive, and should be reserved for vulnerable collections that are accessed very infrequently.

Correct!
Traditional tungsten incandescent bulbs are low in UV, and fiber optic lighting removes any UV light that may be contained in the original light source as the light moves through the fibers.

Wrong: The answer is A and C.
Traditional tungsten incandescent bulbs are low in UV, and fiber optic lighting removes any UV light that may be contained in the original light source as the light moves through the fibers.

Correct!
While there may be special circumstances that require pre-action or gaseous suppression systems, wet pipe sprinklers are the most dependable and easy to maintain at the lowest cost. Water mist systems are very promising, but are not yet as widely available or inexpensive as wet pipe sprinkler systems.

Wrong: The answer is D.
While there may be special circumstances that require pre-action or gaseous suppression systems, wet pipe sprinklers are the most dependable and easy to maintain at the lowest cost. Water mist systems are very promising, but are not yet as widely available or inexpensive as wet pipe sprinkler systems.

Correct!
The majority of library and archives fires are set by arsonists; the figure has been reported as more than 75%. Many of these result from incendiary devices put through the bookdrop.

Wrong: The answer is B.
The majority of library and archives fires are set by arsonists; the figure has been reported as more than 75%. Many of these result from incendiary devices put through the bookdrop.

Correct!
IPM emphasizes ongoing maintenance and housekeeping to ensure that pests will not find a hospitable environment; extermination is not recommended for general preventive purposes.

Wrong: The answer is C.
IPM emphasizes ongoing maintenance and housekeeping to ensure that pests will not find a hospitable environment; extermination is not recommended for general preventive purposes.

Correct!
Controlled freezing and modified atmospheres (decreased oxygen, increased carbon dioxide, or use of an inert gas such as nitrogen) have been used successfully to eradicate pests. Gamma radiation is not recommended because it damages collections, and chemical treatments are not recommended except as a last resort due to the toxic nature of pesticides.

Wrong: The answer is A and C.
Controlled freezing and modified atmospheres (decreased oxygen, increased carbon dioxide, or use of an inert gas such as nitrogen) have been used successfully to eradicate pests. Gamma radiation is not recommended because it damages collections, and chemical treatments are not recommended except as a last resort due to the toxic nature of pesticides.

Correct!
Experience has shown that mold will almost certainly grow on wet collections within 48-72 hours, although action should be taken as soon as the problem is discovered.

Wrong: The answer is D.
Experience has shown that mold will almost certainly grow on wet collections within 48-72 hours, although action should be taken as soon as the problem is discovered.

Correct!
Moldy items can be air-dried, but fans should not be used since they will circulate mold spores and potentially cause additional mold growth on items not affected by the initial outbreak. Items should be cleaned only by a person using a HEPA vacuum and wearing appropriate personal protective equipment; brushing off the mold will further circulate the spores and may cause health problems for the person doing the cleaning. Reducing relative humidity will dry out the space and help to reduce active mold growth, and freezing is a good strategy for moldy items that cannot be dried and cleaned immediately.

Wrong: The answer is B and C.
Moldy items can be air-dried, but fans should not be used since they will circulate mold spores and potentially cause additional mold growth on items not affected by the initial outbreak. Items should be cleaned only by a person using a HEPA vacuum and wearing appropriate personal protective equipment; brushing off the mold will further circulate the spores and may cause health problems for the person doing the cleaning. Reducing relative humidity will dry out the space and help to reduce active mold growth, and freezing is a good strategy for moldy items that cannot be dried and cleaned immediately.