“Shutter speed determines how long the camera sensor is exposed to light. A fast shutter speed minimizes motion blur, while a slow shutter speed increases the likelihood of motion blur in moving objects.”
— Axis Communications Academy, Network Video Fundamentals, 2022
“Motion blur in surveillance footage is primarily affected by the camera’s shutter speed setting, not the frame rate or compression.”
— Axis Communications, Shutter and Exposure
[References:, , Axis Communications Academy, Network Video Fundamentals, 2022 (p. 18–19), , Axis Web Article: Shutter and Exposure, ]
Question 22
What is the purpose of the indicators in the lower part of this image?
Options:
A.
They help an installer ensure the camera is mounted straight
B.
They provide shortcuts to preset camera positioning
C.
They show an operator the current direction a PTZ camera is facing
D.
They provide an easy way to set a camera’s focus and zoom
Answer:
C
Explanation:
"The compass-style indicators in the user interface display the current pan direction of a PTZ camera. This helps operators orient themselves and know which direction the camera is facing in real-time."
— Axis Communications Academy, Network Video Fundamentals, 2022
"On-screen compass indicators are designed to show operators the camera’s current field of view, making navigation and incident tracking easier."
— Axis PTZ Control User Manual
[References:, , Axis Communications Academy, Network Video Fundamentals, 2022 (p. 61), , Axis PTZ Control User Manual, , , , ]
Question 23
Which certified product line is recommended for hazardous areas?
Options:
A.
F-line products
B.
M-line products
C.
XF/XP products
D.
P-line products
Answer:
C
Explanation:
The XF/XP product line is specifically designed for hazardous areas. These cameras are certified for use in environments where flammable gases, vapors, or dust may be present. They meet the necessary safety and compliance standards for such conditions, making them suitable for deployment in hazardous areas. This recommendation is based on Axis Communications’ documentation on product lines certified for hazardous environments.
Question 24
Which is true for a multidirectional camera?
Options:
A.
The lenses move automatically when tracking an object
B.
Each sensor is assigned its own IP address
C.
The sensors are movable to enable optimal usage
D.
The image from each sensor is automatically dewarped
Answer:
C
Explanation:
A multidirectional camera is equipped with multiple sensors that can be independently adjusted to cover different areas. This flexibility allows for optimal usage of the camera by positioning each sensor to capture specific scenes or angles. These sensors are typically fixed in place once set up, but their initial placement can be adjusted to ensure comprehensive coverage. Axis documents specify that multidirectional cameras are designed for customizable installation to meet varying surveillance needs.