Question 1

Off-delay timers must have power applied to permit the timing circuit to operate.&#10;A)instantaneously&#10;B)at all times&#10;C)intermittently&#10;D)regularly

Accepted Answer

Off-delay timers require a constant power supply to be active and allow the timing circuit to operate. If the power supply is disrupted, the timer will not function properly and the timer's delay operation will be affected. Off-delay timers require continuous power to operate their timing circuit. Without a constant power source, the timer will not be able to function properly.

Question 2

Nontimed contacts are controlled directly by the timer coil, as in a(n) control relay.&#10;A)industrial-type&#10;B)specific-purpose&#10;C)motor-driven&#10;D)general-purpose

Accepted Answer

General-purpose control relays are used for a wide range of applications, including non-timed contacts that are directly controlled by the timer coil. They are versatile and can be used in various control circuits. General-purpose control relays are designed to control non-timed contacts directly through the timer coil. They can be used in a variety of applications and are not specific to any particular industry or purpose.

Question 3

Motor-driven timers are used where frequent starting of large motors is required.

Accepted Answer

Motor-driven timers are typically used for precise, long-duration timing applications, not specifically for starting large motors frequently. Starting large motors frequently would more likely involve direct online starters, soft starters, or variable frequency drives to manage the high inrush currents and mechanical stresses involved.

Question 4

Timing relays are used for any application where the operating sequence requires a delay.

Accepted Answer

Timing relays are specifically designed to introduce a delay in the operating sequence. Therefore, they are commonly used when the timing of operations is critical in a process or system. Timing relays are designed to introduce an intentional delay in an electrical circuit during its operation, making them suitable for applications that require a specific time delay.

Question 5

The exact timing value for any position within the timing range must be .&#10;A)calculated with field data&#10;B)given by manufacturers&#10;C)read from the panel&#10;D)found by trial and error

Accepted Answer

The answer of The exact timing value for any position...

Question 6

Electronic timers have become increasingly popular in industrial applications.

Accepted Answer

Electronic timers are widely used in industrial applications because they offer more accuracy, flexibility, and control compared to mechanical timers. They can be programmed for various time intervals and can control multiple devices simultaneously. Electronic timers offer precision and programmable control, making them ideal for use in industrial settings. They are commonly used in manufacturing, processing, and automation applications to optimize timing sequences for improved efficiency and productivity.

Question 7

When there are several timers that meet the requirements of a given application, it is advisable to select the timer with the .&#10;A)smallest number of operating parts&#10;B)lowest cost&#10;C)best reputation&#10;D)best support contract

Accepted Answer

The timer with the smallest number of operating parts is generally simpler and easier to use, which can reduce the likelihood of errors or malfunctions. This also often corresponds with lower cost, making it an efficient choice for most applications. Reputation and support contract are not necessarily indicative of actual performance or suitability for a given application. Selecting the timer with the smallest number of operating parts will typically result in a simpler and more reliable system. This can also lead to cost savings, as simpler components are often less expensive to manufacture and maintain. While reputation and support contracts are important factors to consider, they should not be the primary criteria for selecting a timer.

Question 8

A DC series relay is used as an adjustable resistor to vary the time.

Accepted Answer

A DC series relay is not used as an adjustable resistor to vary the time. It is primarily used for switching high power loads on and off. A DC series relay is used as a switch to open or close a circuit, it cannot be used as an adjustable resistor to vary the time.

Question 9

Timers that can be set for multiple functions or as off-delay timers generally plug into -pin tube sockets.&#10;A)eight&#10;B)nine&#10;C)eleven&#10;D)twelve

Accepted Answer

Eleven-pin tube sockets are commonly used for timers that can be set for multiple functions or as off-delay timers, providing the necessary connections for these versatile devices.

Question 10

Pneumatic timers have good repeat accuracy.

Accepted Answer

Pneumatic timers utilize compressed air to control timing functions, resulting in good control and repeatability. Pneumatic timers use compressed air to control timing functions and have good repeat accuracy, which means they consistently produce the same timing results.

Deck 9: Timing Relays