740 Variable Voltage Selective-Collective
Modern Control Systems (NEIEP)
If there is a short in the hall or car button circuits, which fuse/s should open? -
ANSWER-Fuse 5 or 10
In the duplex system, when one car is traveling down to the lobby and the second car is
parked at the lobby with the generator shit down, which car would answer a 5th floor up
hall call? - ANSWER-Home car
On duplex operation, what relay drops out on a power failure and ties the hall button
circuit to the power supply of the other car? - ANSWER-RV
On duplex operation, what relay is always energized during normal operation and drops
out when the car stop switch is opened? - ANSWER-TG
Slow speed relays 1E, 2E, and 3E pull in at the same time, shunting the GF1, GF2, and
GF3 resistors. What prevents the car from feeling bumps? - ANSWER-The self excited
shunt field
The brake coil is energized by the U 3-4 or D 3-4 contacts on the HL1 side of the line
and by what contact on the MF side of the line? - ANSWER-H 1-2
The DF relay [13] will not pick in either direction. Which of the following is probably
open? - ANSWER-H 1-2
The motor generators drive motor (DV) will run on delta through what contacts? -
ANSWER-KR 1-2, KR 3-4, and KR 5-6
To close the doors when I'm attendant control , what buttons must be pressed? -
ANSWER-The U or D button
What 2 sets of contacts in the direction circuit close when the leveling assembly is
lifted? - ANSWER-LV2 and LV6
What contacts in the suicide circuit kills the residual magnetism in the generator fields? -
ANSWER-SUD 1/2 & 7/8 and H 4/15
What three contacts will energize the reverse phase relay and 2RF rectifier? -
ANSWER-ER 1-2, ER 3-4, and ER 5-6
When contacts 2E 5-6 open, what resistance is inserted in series with the generator
field (GSEF)? - ANSWER-GF2
Modern Control Systems (NEIEP)
If there is a short in the hall or car button circuits, which fuse/s should open? -
ANSWER-Fuse 5 or 10
In the duplex system, when one car is traveling down to the lobby and the second car is
parked at the lobby with the generator shit down, which car would answer a 5th floor up
hall call? - ANSWER-Home car
On duplex operation, what relay drops out on a power failure and ties the hall button
circuit to the power supply of the other car? - ANSWER-RV
On duplex operation, what relay is always energized during normal operation and drops
out when the car stop switch is opened? - ANSWER-TG
Slow speed relays 1E, 2E, and 3E pull in at the same time, shunting the GF1, GF2, and
GF3 resistors. What prevents the car from feeling bumps? - ANSWER-The self excited
shunt field
The brake coil is energized by the U 3-4 or D 3-4 contacts on the HL1 side of the line
and by what contact on the MF side of the line? - ANSWER-H 1-2
The DF relay [13] will not pick in either direction. Which of the following is probably
open? - ANSWER-H 1-2
The motor generators drive motor (DV) will run on delta through what contacts? -
ANSWER-KR 1-2, KR 3-4, and KR 5-6
To close the doors when I'm attendant control , what buttons must be pressed? -
ANSWER-The U or D button
What 2 sets of contacts in the direction circuit close when the leveling assembly is
lifted? - ANSWER-LV2 and LV6
What contacts in the suicide circuit kills the residual magnetism in the generator fields? -
ANSWER-SUD 1/2 & 7/8 and H 4/15
What three contacts will energize the reverse phase relay and 2RF rectifier? -
ANSWER-ER 1-2, ER 3-4, and ER 5-6
When contacts 2E 5-6 open, what resistance is inserted in series with the generator
field (GSEF)? - ANSWER-GF2
