Timing and Counting Devices

Question 1

Assume a DOE timer is configured with one normally closed contact with a time-delay of 30 seconds. What is the position of the contact immediately after power is applied to the coil?

A) Closed
B) Open

Answer 1

A) Closed

Question 2

After a start signal is received to start a pump motor, a time delay is required to allow time for pre-lube to the pump. This would be an application for which type of timing relay?

A) DODE
B) DOE

Answer 2

B) DOE

Question 3

The ___ solid-state timer is a timing device in which the “contacts” will instantly change state when the timer is powered on or an external trigger is applied. The contacts will remain in the activated state until the timing period has elapsed.

A) off-delay
B) one-shot
C) repeat-cycle

Answer 3

B) one-shot

Question 4

Mechanical counters have essentially been replaced by electronic counters.

A) True
B) False

Answer 4

A) True

Question 5

Assume a DOE timer is configured with one normally closed contact with a time-delay of 30 seconds. What is the position of the contact 30 seconds after power is applied to the coil?

A) Closed
B) Open

Answer 5

B) Open

Question 6

Motor control drawings show their components in the “Normal” de-energized state.

A) True
B) False

Answer 6

A) True

Question 7

The ___ value is the current number of time units a programmed timer has counted after the timing period has been initiated.

A) accumulated
B) preset
C) time base

Answer 7

A) accumulated

Question 8

The ___ value is the number of time units a programmed timer is programmed to count before timed contacts change state.

A) accumulated
B) preset
C) time base

Answer 8

B) preset

Question 9

Assume a DODE dashpot timer is configured with one normally closed contact with a time delay of 30 seconds. What is the position of the contact 30 seconds after power is removed from the coil?

A) Closed
B) Open

Answer 9

A) Closed

Question 10

Programmed timers’ output contacts change state then the ___ value equals the preset value.

A) accumulated
B) preset
C) time base

Answer 10

A) accumulated

Question 11

___ counters accumulate input pulses from two inputs and provide an output after the preset count value is reached, one input adds counts and one input subtracts counts from the accumulated total.

A) Mechanical
B) Up
C) Up/Down

Answer 11

C) Up/Down

Question 12

Assume a DODE dashpot timer is configured with one normally closed contact with a time delay of 30 seconds. What is the position of the contact prior to power being applied to the coil?

A) Closed
B) Open

Question 13

The ___ timer is a timing device in which the contacts cycle open and close repeatedly once the timer is activated.

A) off-delay
B) one-shot
C) repeat-cycle

Answer 13

C) repeat-cycle

Question 14

Which timer is appropriate for keeping a motor starter energized after power is removed from the timer’s power input?

A) DODE
B) DOE

Answer 14

A) DODE

Question 15

Once initiated, ___ contacts change state after a set time period has passed. Once the time has passed, all normally open timed contacts close and all normally closed timed contacts open.

A) DODE
B) DOE

Answer 15

B) DOE

Question 16

Assume a DOE timer is configured with one normally closed contact with a time delay of 30 seconds. What is the position of the contact prior to power being applied to the coil?

A) Closed
B) Open

Answer 16

A) Closed

Question 17

Typical time bases available for programmable timers are 0.01, 0.1, and 1.0 minutes.

A) True
B) False

Answer 17

B) False

Question 18

The current carrying capacities for most timing relays is ___.

A) 2 A
B) 10 A
C) 20 A

Answer 18

B) 10 A

Question 19

The off-delay function is also called a ___.

A) DODE
B) DOE

Answer 19

A) DODE

Question 20

A ___ programmed timing function retains its accumulated value between input signals.

A) non-retentive
B) retentive

Answer 20

B) retentive