Lesson 406 - Timing Relays: Off-Delay, One-Shot, and Multifunction
b. III
Figure 406-004 The control circuit is energized. A JCK70 multifunction relay is used Refer to Figure 406-004. Operational diagram ___ indicates the correct operation of the circuit where the function setting switch is set for OFF DELAY. Select one: a. V b. III c. II d. IV e. I
c. III
Figure 406-006 The control circuit is energized. A JCK70 multifunction relay is used. nar004-1.jpg Refer to Figure 406-006. Operational diagram ___ indicates the correct operation of the circuit where the function setting switch is set for ONE SHOT. Select one: a. II b. IV c. III d. V e. I
e. turn ON immediately and go OFF after 1½ hrs
Figure 406-008 The relay settings are as shown. The float switch will stay closed for longer than the timed interval. Refer to Figure 406-008. When the float switch closes, the red light will ___. Select one: a. stay OFF and then turn ON 1½ hrs after the float switch opens b. stay OFF for 1½ hrs and then turn ON and stay ON until the float switch opens c. turn ON immediately and go OFF after 90 sec d. turn ON immediately and turn OFF 90 sec after the float switch opens e. turn ON immediately and go OFF after 1½ hrs
b. turn ON immediately and go OFF after 22.5 seconds
Figure 406-011 The relay settings are as shown. The float switch will stay closed for longer than the timed interval. nar008-1.jpg Refer to Figure 406-011. When the float switch closes, the red light will ___. Select one: a. stay OFF for 22.5 seconds and then turn ON and stay ON until the float switch opens b. turn ON immediately and go OFF after 22.5 seconds c. turn ON immediately and go OFF after 225 seconds d. turn ON immediately and turn OFF 2.25 seconds after the float switch opens e. stay OFF for 22.5 seconds and then turn ON for 22.5 seconds - and then turn OFF
d. 180
Figure 406-014 Refer to Figure 406-014. With the range setting at 999M, the time setting should be set at ___ to obtain a 3 hour delay. Select one: a. 018 b. 030 c. 300 d. 180 e. 003 f. none of these
b. M is running. After S1 is pushed and released, M continues to run. M stops when S2 is pushed, but restarts 2 minutes after S2 is released.
For the diagram shown below, ___ is the correct sequence of operation. TR is an OFF-Delay Relay Select one: a. M1 is stopped. After S1 is pushed and released, M remains stopped. M starts when S2 is pushed, but stops 2 minutes after S2 is released. b. M is running. After S1 is pushed and released, M continues to run. M stops when S2 is pushed, but restarts 2 minutes after S2 is released. c. M1 is stopped. After S1 is pushed and released, M starts. M stops when S2 is pushed, but restarts 2 minutes after S2 is released. d. none of these
b. 003
Refer to Figure 406-014. With the range setting at 999S, the time setting should be set at ___ to obtain a 3 second delay. Select one: a. 030 b. 003 c. 300 d. none of these or out of range
a
Select (as required) the NEMA or industry standard symbol for an NCTC set of timing relay contacts. Select one:
a. OFF
TR is a one-shot relay. Refer to Figure 406-061. Five seconds before Sw 1 is closed, the green light will be ___. The control switch is open. Select one: a. OFF b. ON
b. OFF
TR is a one-shot relay. Refer to Figure 406-061. One second after Sw 1 is closed, the green light will be ___. The control switch is open. Select one: a. ON b. OFF
a. ON
TR is a one-shot relay. Refer to Figure 406-061. One second after Sw 1 is closed, the red light will be ___. The control switch is open. Select one: a. ON b. OFF
b. ON
TR is a one-shot relay. Refer to Figure 406-061. Sw 1 has been closed for 30 minutes and remains closed. Five seconds after the control switch is closed, the green light will be ___. Select one: a. OFF b. ON
b. OFF
TR is a one-shot relay. Refer to Figure 406-061. Sw 1 has been closed for 30 minutes and remains closed. The control switch is then closed. Fifteen seconds after the control switch was closed, the green light will be ___. Select one: a. ON b. OFF
b. OFF
TR is a one-shot relay. Refer to Figure 406-061. Sw 1 has been closed for 30 minutes and remains closed. The control switch was then closed. The control switch has been closed for 7 minutes and is now opened. Five seconds after the control switch is opened, the green light will be ___. Select one: a. ON b. OFF
c. 1
TR is an OFF-Delay Relay nar001-1.jpg Refer to Figure 406-012. Point G on the ladder diagram should be connected at terminal ___ on the relay socket. Select one: a. 4 b. 5 c. 1 d. 2 e. 3
e. 1
TR is an OFF-Delay Relay nar001-1.jpg Refer to Figure 406-012. Point H on the ladder diagram should be connected at terminal ___ on the relay socket. Select one: a. 3 b. 4 c. 2 d. 5 e. 1
b. 3
TR is an OFF-Delay Relay nar001-1.jpg Refer to Figure 406-012. Point J on the ladder diagram should be connected at terminal ___ on the relay socket. Select one: a. 5 b. 3 c. 1 d. 4 e. 2
e. 4
TR is an OFF-Delay Relay nar001-1.jpg Refer to Figure 406-012. Point K on the ladder diagram should be connected at terminal ___ on the relay socket. Select one: a. 2 b. 1 c. 5 d. 3 e. 4
c. 2
TR is an OFF-Delay Relay nar001-1.jpg Refer to Figure 406-012. Point L on the ladder diagram should be connected at terminal ___ on the relay socket. Select one: a. 1 b. 3 c. 2 d. 5 e. 4
b. ON
TR is an OFF-Delay relay. Refer to Figure 406-021. The timer is set for 10 seconds. Five seconds before Sw 1 is closed, the red light will be ___. The control switch is open. Select one: a. OFF b. ON
a. OFF
TR is an OFF-Delay relay. Refer to Figure 406-021. The timer is set for 10 seconds. One second after Sw 1 is closed, the green light will be ___. The control switch is open. Select one: a. OFF b. ON
b. ON
TR is an OFF-Delay relay. Refer to Figure 406-021. The timer is set for 10 seconds. One second after Sw 1 is closed, the red light will be ___. The control switch is open. Select one: a. OFF b. ON
a. OFF
TR is an OFF-Delay relay. Refer to Figure 406-021. The timer is set for 10 seconds. Sw 1 has been closed for 30 minutes and remains closed. The control switch is then closed. Fifteen seconds after the control switch was closed, the red light will be ___. Select one: a. OFF b. ON
b. False
TR1 is a one-shot timing relay set at 20 seconds and TR2 is an 8-pin ON-delay timing relay set for 15 seconds. Refer to Figure 406-041. In sequential order, the statements shown below are all ___. A. START is closed: 1. The red light comes ON immediately. 2. The motor starts immediately. B. 5 minutes after START is closed: 1. The motor is still running. 2. The red light is still ON. C. STOP is pushed and released: 1. The motor continues to run for 15 seconds and then stops. 2. The red light stays ON for 20 seconds and then turns OFF. Select one: a. True b. False
b. True
TR1 is a one-shot timing relay set at 20 seconds and TR2 is an 8-pin ON-delay timing relay set for 15 seconds. Refer to Figure 406-041. In sequential order, the statements shown below are all ___. A. START is closed: 1. The red light comes ON immediately and stays ON for 20 seconds. 2. The motor starts 15 seconds after the red light comes ON. B. 5 minutes after START is closed: 1. The motor is still running. C. STOP is pushed and released: 1. The motor immediately stops running. Select one: a. False b. True
d. II
The control circuit is energized. A JCK70 multifunction relay is used. Refer to Figure 406-002. Operational diagram ___ indicates the correct operation of the circuit where the function setting switch is set for ON DELAY. Select one: a. I b. IV c. V d. II e. III
c. III
The control circuit is energized. A JCK70 multifunction relay is used. Refer to Figure 406-005. Operational diagram ___ indicates the correct operation of the circuit where the function setting switch is set for RECYCLE. Select one: a. IV b. I c. III d. V e. II
c. III
The control circuit is energized. A JCK70 multifunction relay is used. nar002-1.jpg Refer to Figure 406-002. Operational diagram ___ indicates the correct operation of the circuit where the function setting switch is set for INTERVAL. Select one: a. IV b. I c. III d. V e. II
e.
The pin arrangement for a multifunction timing relay (Sq D JCK70) is shown below. Which (if any) of the diagrams shown below is correctly connected to have the OFF-delay contacts close and turn ON the light at some preset time after the control switch is closed? Select one:
b. stay OFF for up to 1½ m; then: ON for 1½ m, OFF for 1½ m, ON for 1½ m, OFF for 1½ m, etc
The relay settings are as shown. The float switch will stay closed for longer than the timed interval. Refer to Figure 406-009. When the float switch closes, the red light will ___. Select one: a. turn ON within 1½ hrs and stay ON for 1½ hrs; then: OFF for 1½ hrs, ON for 1½ hrs, OFF for 1½ hrs, ON for 1½ hrs, etc b. stay OFF for up to 1½ m; then: ON for 1½ m, OFF for 1½ m, ON for 1½ m, OFF for 1½ m, etc c. turn OFF within 1½ hrs and stay OFF for 1½ hrs; then: ON for 1½ hrs, OFF for 1½ hrs, ON for 1½ hrs, OFF for 1½ hrs, etc d. stay OFF for 22.5 seconds and then turn ON and stay ON until the float switch opens e. stay OFF for up to 15 m; then: ON for 15 m, OFF for 15 m, ON for 15 m, OFF for 15 m, etc
d. turn ON immediately and turn OFF 5 min and 16 sec after the float switch opens
The relay settings are as shown. The float switch will stay closed for longer than the timed interval. nar010-1.jpg Refer to Figure 406-007. When the float switch closes, the red light will ___. Select one: a. turn ON immediately and go OFF after 5 min and 16 sec b. stay OFF and then turn ON 5 min and 16 sec after the float switch opens c. stay OFF for 3 min and 16 sec and then turn ON for 3 min and 16 sec - and then turn OFF d. turn ON immediately and turn OFF 5 min and 16 sec after the float switch opens e. stay OFF for 5 min and 16 sec and then turn ON and stay ON until the float switch opens
e. OFF DELAY
Using the relay shown here, a sign and several 12-V lights along a sidewalk are to come on when a DPST time clock closes. The time clock is set to close at dusk and open at 10 pm. The signage is to turn off when the TC opens. However, the lights are to remain on for an additional 30 minutes. The 12-V lights are connected to the secondary of a 120-to-12 volt transformer. The 120-V circuit is LA-1 and supplies power to the control circuit, the TC, the sign, and the transformer primary. nar012-1.jpg Scenario 406-02 Refer to Scenario 406-02. The FUNCTION SETTING switch on the relay should be set to ___. Select one: a. R. CYCLE b. ON DELAY c. INTERVAL d. ONE SHOT e. OFF DELAY
d.
Using the relay shown here, several 12-V lights are to come on when the single-pole switch at the exit door is turned on. These lights are to remain on for 5 minutes after the switch is turned off. This allows time to walk down the sidewalk to your car. The 12-V lights are connected to the secondary of a 120-to-12 volt transformer. The 120-V circuit is LA-1 and supplies both the control power and the transformer primary. Scenario 406-01 Refer to Scenario 406-01. Which of the diagrams below is correctly connected? Select one:
b. 300
Using the relay shown here, several 12-V lights are to come on when the single-pole switch at the exit door is turned on. These lights are to remain on for 5 minutes after the switch is turned off. This allows time to walk down the sidewalk to your car. The 12-V lights are connected to the secondary of a 120-to-12 volt transformer. The 120-V circuit is LA-1 and supplies both the control power and the transformer primary. Scenario 406-01 Refer to Scenario 406-01. With the RANGE SETTING switch set on 999S, the TIME SETTING should be set to ___. Select one: a. 005 b. 300 c. 030 d. 500 e. 050
b. I
When using a JCK-70 as an ON delay timer, the function setting switch is set as shown at ___ in Figure 406-015. Select one: a. V b. I c. III d. IV e. II
a. II
When using a JCK-70 as an interval timer, the function setting switch is set as shown at ___ in Figure 406-015. Select one: a. II b. IV c. V d. I e. III
c. Immediately, NO timed contacts close and NC timed contacts open.
Which of the following statements is true for an 11-pin off-delay timing relay when the external switch is closed? Select one: a. After a pre-programmed period of time, NO timed contacts open and NC timed contacts close. b. After a pre-programmed period of time, NO timed contacts close and NC timed contacts open. c. Immediately, NO timed contacts close and NC timed contacts open. d. Immediately, NO timed contacts open and NC timed contacts close.
d. none of these or out of range
With the range setting at 999M, the time setting should be set at ___ to obtain a 3 hour delay. Select one: a. 030 b. 300 c. 003 d. none of these or out of range
a. I
symbol ___ is used in a ladder diagram for an NO timed open set of contacts. Select one: a. I b. IV c. II d. V e. III f. VI
