FREE CCTV Knowledge Questions and Answers

0%

What is the acronym for CCD?

Correct! Wrong!

The acronym CCD denotes Charged Coupled Device. Digital cameras and video cameras frequently use this kind of image sensor technology. It converts light into electrical charges, which are subsequently transmitted and stored in a pixelated grid. As a result, the gadget can take and process excellent photos and videos.

When a technician or salesperson adds content to a signed document or forges a customer's signature, what crimes are they committing?

Correct! Wrong!

Fraud is when a technician or salesperson adds content to a document that has already been signed or forges a customer's signature. This is due to the fact that fraud is deliberate deception or misrepresentation for one's own benefit; in this instance, the technician or salesperson is misleading the client by making changes to the document without the client's knowledge or approval.

When pointing cameras toward highly illuminated regions, what feature assists to increase the quality of the image?

Correct! Wrong!

When pointing cameras toward brightly illuminated places, backlight adjustment is a feature that helps to improve the quality of the images. By adjusting the exposure settings, it keeps the subject from looking dark or out of focus against the bright light by balancing the brightness levels between the subject and the background. Backlight correction produces a more balanced and sharper image by automatically adjusting the exposure to suit both the subject and the background.

There are two types of GSM and CDMA:

Correct! Wrong!

There are two varieties of cellular networks: GSM and CDMA. Mobile devices can link to mobile networks, a kind of wireless communication system, to make and receive phone calls and browse the internet. Cellular networks employ two different technologies, GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access), to send and receive signals. While CDMA is more prevalent in North America, GSM is widely utilized throughout Europe. Through the use of these technologies, mobile devices can seamlessly engage in wireless communication with both the network infrastructure and one another.

What setting on a meter should I use to measure VAC correctly?

Correct! Wrong!

V, or volts, is the appropriate setting on a meter to measure VAC. An alternating current (AC) circuit's voltage is measured using this setting. The meter can be set up to precisely measure the voltage level in the circuit by choosing the V setting.

What is meant by CIF is:

Correct! Wrong!

Common Intermediate Format, or CIF for short, is a video resolution used for video compression and video conferencing. It is frequently used for video calling and streaming, boasting a resolution of 352 × 288 pixels. Thus, "A common resolution" is the right response.

According to NFPA 70, what determines the type o insulation used on conductors in an installation?

Correct! Wrong!

The current flowing through a circuit dictates the kind of insulation that should be applied to its conductors. The quantity of heat produced depends on the current passing through the conductors, and the insulation is chosen depending on its capacity to tolerate and shield against this heat. The current of the circuit plays a significant role in selecting the right insulation type because different insulation materials have varying temperature ratings.

Regarding cabling, UTP denotes:

Correct! Wrong!

The acronym UTP denotes Unshielded Twisted Pair. When discussing cables, the term "UTP" designates a kind of cable made up of twisted pairs of wires without any shielding. This kind of cable is well-known for being inexpensive and simple to install, and it is frequently utilized for Ethernet connections. UTO has no extra protection against electromagnetic interference, in contrast to shielded cables. Nonetheless, it works well for the majority of applications in settings such as homes and small businesses where there is little chance of interruption.

In a power supply, a blown fuse typically signifies:

Correct! Wrong!

In most cases, a blown fuse in a power supply denotes an excessive current draw. The fuse may overheat and finally blow if there is an excessive amount of current flowing through the circuit. This safety feature guards against damage to the power source and other parts. It suggests that the circuit has a malfunction or flaw that is generating an unusual amount of current to be pulled.

One feature of direct current is that it

Correct! Wrong!

The flow of electric charge in direct current (DC) is unidirectional and is distinguished by its constant polarity. DC keeps an even flow of electrons in a single direction, in contrast to alternating current (AC), which alternates direction on a regular basis. Because of this characteristic, DC can be used in a variety of settings, including the charging of batteries, electrical equipment, and some kinds of motors.

What is the circuit's total current as depicted above? (This table is not visible.)

Correct! Wrong!

Premium Tests $49/mo
FREE May-2024