Question 1

Several circuits can be used to construct a bounceless switch, but the most common method uses ____.&#10;A) digital gates&#10;B) digital-logic gates&#10;C) power gates&#10;D) analog-logic gates

Accepted Answer

Digital-logic gates are commonly used to construct a bounceless switch because they can effectively filter out the noise and debounce the signal, ensuring a clean, stable output.

Question 2

When contacts must be debounced, a circuit commonly called a ____ switch is used.&#10;A) bounceless&#10;B) regulated&#10;C) locked&#10;D) flat

Accepted Answer

A bounceless switch, also known as a debounced switch, is used to eliminate the noise (bounces) that occurs when a mechanical switch is pressed or released, ensuring a clean, single transition.

Question 3

Contact bounce can cause the control circuit to literally &#34;lose its mind.&#34;

Accepted Answer

Contact bounce refers to the rapid, uncontrolled, and repeated closure and opening of switch contacts when they are pressed or toggled, leading to multiple unintended signals or transitions. This can confuse the control circuit, causing erratic behavior or misinterpretation of the intended commands, metaphorically causing it to "lose its mind."

Question 4

The number and types of devices used in a control circuit are determined by the circuit.

Accepted Answer

The number and types of devices in a control circuit are specifically chosen based on the requirements and functionalities of the circuit to ensure proper control and operation.

Question 5

When a control circuit is constructed, it must have ____ that tell it what to do.&#10;A) regulating devices&#10;B) sensing devices&#10;C) controlling devices&#10;D) ground devices

Accepted Answer

Sensing devices detect changes in the controlled variable and send signals to the control circuit, which then activates the regulating devices to make the necessary adjustments.

Question 6

A ____ indicates that a pressure is at a certain level or not.&#10;A) float switch&#10;B) toggle switch&#10;C) pressure switch&#10;D) bounce switch

Accepted Answer

A pressure switch is designed to sense the presence of pressure in a system and actuate a response when a certain pressure level is reached or not, making it the correct choice for indicating if a pressure is at a certain level.

Question 7

The ____ can tell the control circuit whether a liquid is at a certain level or not.&#10;A) bounce switch&#10;B) floor switch&#10;C) toggle switch&#10;D) float switch

Accepted Answer

A float switch is designed to detect the level of liquid within a tank or container. It triggers a response when the liquid reaches a specific level, making it suitable for monitoring and controlling liquid levels.

Question 8

Most contacts have a snap action but they do not usually close with a single motion.

Accepted Answer

Most contacts have a snap action, which means they move quickly from one position to another. However, they do not usually close with a single motion. Instead, they close in two stages: first, the contacts make contact with each other, and then they snap into place. This two-stage closing action helps to ensure that the contacts make a good connection and that they stay in place.

Question 9

When used with electronic control systems, contact bounce is not a source of trouble.

Accepted Answer

Contact bounce can cause multiple signals to be sent from a switch to an electronic control system, leading to errors or malfunctions.

Question 10

The NAND logic gate cannot be used to construct a bounceless switch.

Accepted Answer

NAND gates can be used in various configurations to create debouncing circuits for switches, thus they can indeed be used to construct a bounceless switch.

Deck 44: The Bounceless Switch