WorksheetsElectro-Fluid Power Mod 4-Control Relays
Total questions: 11
Worksheet time: 6mins
In most control circuits, the national electric code requires that the ______ input be the first input in the circuit
Selector switch
Stop
Indicator lamp
Motor
On a ladder diagram, a normally open contact symbol of a control relay is shown as… (Page 108)
One line perpendicular to the conductor line
Two parallel lines perpendicular to the conductor line
Two parallel lines perpendicular to the conductor line with a slanted line between them
One circle with the conductor line connected to each side of it
The _____________ is used most often as a memory logic element in electrical control circuits (Page 105)
Control transformer
Control relay
Normally closed push button
Circuit breaker
A uni-directional motor’s output can be measured in _________ (Page 131)
Both directions
Current
Deceleration rate
Torque
The machine control relay performs the same types of functions as the general purpose relay but is instead designed for _____________ (Page 119)
Low-cost applications
High moisture
High-cost applications
Heavy-duty applications
A bi-directional motor can be operated in both directions by using a ________valve (Page 131)
Single-solenoid, two position
Double-solenoid, two position
Single-solenoid, three position
Double solenoid, three position
A general purpose relay is designed mainly for ___________ (Page 114)
Low-cost applications
Heavy-duty applications
High moisture areas
High-Cost applications
A control relay uses it’s _____________ to perform control logic based on certain input conditions (Page 114)
Armature
Electronics
Contacts
Plunger
Standard industry practice is to carry the flow of electricity to a solenoid through _____ that are designed for heavier duty service (Page 105)
Manually operated push buttons
DCVs
A set of relay contacts
Flow control valves
The number of throws a relay has depends on the number of different ___________ (Page 116)
Closed contact positions
Closed contacts on the relay
Breaks of the contacts
Poles the relay has
The term seal-in refers to a special _________ (Page 125)
Contacts
Coil
Wiring method
Push button
