Electro-Fluid Power Mod 5- Sequencing Control

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