VErifiEd GradEd a+
The _____ method of interlocking uses a lever to physically prevent the armature of one of the
contacts from moving. ✔✔ Mechanical
The _____ method of interlocking uses two Double Pole, Single Throw (DPST) push buttons. ✔✔
Push Button
What is the process of operating one of the machines actuators in the manual mode called? ✔✔
Jogging
The two main components of a limit switch are the _____ mechanism and the contacts. ✔✔
Actuating
Limit switches are often used as safety _____. ✔✔ Interlocks
The ladder diagram for any limit switch includes a switch bar with a _____ attached to it. ✔✔
Cam
_____ switches include a device that senses the level of a liquid. ✔✔ Float
A _____ pumping operation uses a circuit that is designed to pump liquid out of a tank. ✔✔
Sump
A _____ is often used to keep a tank filled to a desired level. ✔✔ N.C. Float switch
, A _____ switch is designed to open or close its contacts when the pressure in a system reaches
a certain point. ✔✔ Pressure
The actuator in a pressure switch is a plunger which is attached to a _____. ✔✔ Diaphragm
The pressure level at which the switch is actuated is often called the _____. ✔✔ Set Point
An _____ relay is a type of control relay that moves its contacts to a new state after a
predetermined time has elapsed. ✔✔ On-Delay
Common timing mechanisms include pneumatic timers, _____ timers, and motor-driven timers.
✔✔ Solid-State
To avoid overheating, it is recommended that a motor be _____ when it is started. ✔✔
Unloaded
Using timers to sequence the operation of a machine is called __________. ✔✔ Time-Driven
Sequencing
What are the three common timing mechanisms used on timer relays? ✔✔ Motor-Driven,
Pneumatic, Solid-State
The series of moves a machine has to make in order to perform a task is called a(n) __________.
✔✔ Sequence of operation
Which type of overload has a time delay? ✔✔ Thermal Overload