Question 1

methods of control may be used in place of the basic float switch for liquid level control.&#10;A)Magnetic&#10;B)Electronic&#10;C)Liquid&#10;D)Rod-based

Accepted Answer

Electronic methods of control are typically more reliable and accurate than traditional float switch methods. Magnetic methods may also be a good choice for certain applications, but electronic methods are generally preferred. Liquid and rod-based methods are less common and may not be as effective. Electronic methods of control are more accurate and reliable than traditional float switches. They use sensors to measure the level of the liquid and can be programmed to control the filling and emptying of tanks and reservoirs accurately. They are also less prone to wear and tear compared to float switches, which require periodic replacement. Therefore, electronic methods of control are the best choice for liquid level control.

Question 2

In a mercury bulb-type float switch, when the liquid level is below the position of the bulb, the bulb is in a horizontal position.

Accepted Answer

In a mercury bulb-type float switch, when the liquid level is below the position of the bulb, the bulb is in a vertical position. In a mercury bulb-type float switch, when the liquid level is below the position of the bulb, the bulb is in a vertical position, not horizontal.

Question 3

One mercury bulb float switch is used to control a pump motor.

Accepted Answer

False

Question 4

The operation of a float switch is controlled by the forward or backward movement of a float placed in a water tank.

Accepted Answer

A float switch operates based on the rise and fall of the float level with the water level in the tank, not the forward or backward movement.

Question 5

In a mercury bulb-type of float switch, a set of mercury contacts is located inside the .&#10;A)conductor&#10;B)bulb&#10;C)motor&#10;D)tank

Accepted Answer

The mercury bulb is where the set of mercury contacts is located inside the float switch. The mercury contacts are located inside the bulb of the float switch. When the float rises or falls with the liquid level, the mercury contacts make or break the connection to control the pump or other equipment.

Question 6

When the mercury bulb-type float switch changes position, .&#10;A)the mercury contacts multiply&#10;B)the mercury bulb-type float switch is no longer usable&#10;C)the pump begins operation&#10;D)the state of the contacts in the mercury switch are changed

Accepted Answer

When the mercury bulb-type float switch changes position, the state of the contacts in the mercury switch changes, which can be used to control other devices such as pumps. When the mercury bulb-type float switch changes position, the state of the contacts in the mercury switch are changed. This change in contact state can be used to control the operation of pumps or other devices.

Question 7

The float switch contacts may be either normally open or normally closed and .&#10;A)may not be submerged&#10;B)may not be suspended&#10;C)may be submerged&#10;D)may be suspended

Accepted Answer

The answer of The float switch contacts may be either...

Question 8

The mercury bulb switch appears to be a rubber bulb connected to a conductor.

Accepted Answer

The mercury bulb switch consists of a glass bulb containing mercury and two electrodes or conductors. When the bulb is tilted, the mercury flows and completes the circuit, allowing the switch to turn on or off. It is not a rubber bulb.

Question 9

A float switch is used when a pump motor must be started and stopped according to changes in the in a tank or sump.&#10;A)mercury level&#10;B)Bourdon&#10;C)water pressure&#10;D)liquid level

Accepted Answer

A float switch is used to detect changes in liquid level in a tank or sump and to turn on/off a pump motor accordingly. It is not used for mercury level, Bourdon, or water pressure detection. A float switch is used to detect changes in the liquid level in a tank or sump, which then triggers the pump motor to start or stop accordingly.

Question 10

An electrode, or stainless steel probe system, conducts a circuit in the liquid instead of using floats.

Accepted Answer

An electrode or stainless steel probe system is used to conduct a circuit in the liquid, which is different from using floats in liquid level measurement. This statement is true. An electrode or stainless steel probe system is used to measure the level of liquid in a container by conducting a circuit through the liquid. It does not rely on floats to measure the level.

Deck 11: Float Switches