WorksheetsElectro-Fluid Power Mod 5- Sequencing Control
Total questions: 12
Worksheet time: 6mins
A __________ switch senses the actuator position on an automatic machine (Page 136)
Knife
Selector
Push button
Limit
A limit switch with three terminals is known as a _________ switch (Page 145)
Single-pole, Single throw (SPST)
Single-pole, Double throw (SPDT)
Double pole, Single throw (DPST)
Double pole, Souble throw (DPDT)
To protect a limit switch from dirt, a (n) _________ is used.(Page 143)
Fuse
Open switch
Enclosure
Circuit breaker
A single cycle reciprocation circuit requires a minimum of ______ control relay(s) and _______ limit switch (es). (Page 162)
One, One
Two, One
Two, Two
Three, Two
To control two cylinders that are not attached to the same machine member, ______ limit switch (es) must be used. (Page 168)
One
Two
Three
Four
The distance that a limit switch moves from its normal position before its contacts actuate is called the ________________ (Page 138)
Over travel
Total Travel
Differential
Pre-travel
A continuous cycle reciprocation circuit requires a minimum of _______ control relay(s) and _______ limit switch (es) (Page 155)
One; One
Two; One
Two; Two
three; Two
A _________ reciprocation occurs when a machine’s cylinders extend and retract only once upon cycle start (Page 151)
Continuous cycle
Single cycle
Multiple cycle
Single solenoid
A normally open limit switch contact that is held closed is ___________
Activated when the actuator moves from the switch
De-activated when the actuator moves from the switch
De-activated when the actuator moves onto the switch
Not affected by the actuator
Many machines use ________ usually to provide more force (Page 166)
Flow controls
Multiple relays
Multiple switches
Multiple cylinders
__________ is/are used as the best way to synchronize multiple cylinders that must travel together (Page 167)
Flow controls
Several DCVs
A mechanical yoke
Several pumps
To wire a limit switch to pass current when activated, the terminals are ______________
Common, N.O.
Common, N.C.
N.O., N.C.
Common, N.O, and N.C.
