Question 1

Two sets of momentary contacts are usually provided with push buttons.

Accepted Answer

Two sets of momentary contacts are typically provided with push buttons, one set for normally open contacts and the other set for normally closed contacts. Two sets of momentary contacts are typically provided with push buttons, which allow for both normally open or normally closed contacts to be used.

Question 2

The amount of current broken by a push button is usually small.

Accepted Answer

Typically, push buttons are used to complete low current circuits, so the amount of current broken or interrupted by a push button is usually small. Push buttons typically have a small amount of current running through them when they are pressed. This current is usually in the range of milliamps, which is much lower than the amount of current typically used in electrical circuits. This is why push buttons are often used in low-power applications where the amount of current being switched is minimal.

Question 3

A wobble stick is a stem-operated push button for operation .&#10;A)at ground level&#10;B)in an elevated position&#10;C)from any direction&#10;D)at low temperatures

Accepted Answer

A wobble stick is designed to be operated from any direction, allowing for versatile use in various applications.

Question 4

Selector switch positions are made by the operator knob.&#10;A)turning&#10;B)pulling&#10;C)pushing&#10;D)releasing

Accepted Answer

Selector switch positions are determined by turning the operator knob. Selector switches are typically turned to select the desired position.

Question 5

Normally open and normally closed mean that the contacts are .&#10;A)subject to external forces&#10;B)subject to mechanical forces&#10;C)in a rest position&#10;D)held by surface tension

Accepted Answer

Normally open and normally closed refer to the rest position of the contacts in a switch or relay. Normally open contacts are in an open position (not touching) when the switch or relay is not activated, while normally closed contacts are in a closed position (touching) when the switch or relay is not activated. Therefore, the answer is C - in a rest position. Normally open (NO) and normally closed (NC) refer to the rest position of the contacts in a switch or relay. Normally open contacts are in an open position when the switch or relay is not activated, while normally closed contacts are in a closed position when the switch or relay is not activated. Therefore, the best choice is C, as the contacts are in a rest position.

Question 6

Standard control station enclosures may be used in situations requiring submersible protection.

Accepted Answer

Standard control station enclosures are not designed for submersible protection; specialized enclosures rated for submersion are required for such conditions.

Question 7

In most push buttons, copper-to-silver contact surfaces are provided for better electrical conductivity and longer life.

Accepted Answer

The answer of In most push buttons, copper-to-silver contact surfaces...

Question 8

The push-button station enclosure containing the contacts is usually made of molded plastic or .&#10;A)integrated metal&#10;B)sheet metal&#10;C)heavy metal&#10;D)precious metal

Accepted Answer

The push-button station enclosure containing the contacts is usually made of sheet metal, as it provides durability and protection for the contacts within. The other options are not typically used for this purpose. The push-button station enclosure is usually made of sheet metal, which provides durability and protection for the contacts. Molded plastic is another option but may not be as sturdy as sheet metal in certain environments. Integrated metal, heavy metal, and precious metal are not common materials used for this type of enclosure.

Question 9

It is possible to control a motor from as many places as there are stations using .&#10;A)normally closed contacts&#10;B)the red pilot light&#10;C)a pushed closed contact&#10;D)the same magnetic controller

Accepted Answer

The best choice is to use the same magnetic controller to control the motor from as many places as there are stations. This ensures consistency and avoids confusion in the operation of the motor. Using normally closed contacts or a pushed closed contact can potentially cause issues with the control of the motor, and using a red pilot light does not actually control the motor but simply indicates its status. The same magnetic controller allows for centralized control of the motor from multiple stations. Using A, B, or C would require separate controls at each station, making it more difficult to coordinate motor operation.

Question 10

Some double-break contacts are made of gold.

Accepted Answer

The answer of Some double-break contacts are made of gold....

Deck 6: Push Buttons and Control Stations