Electrical Control Systems (Amatrol Quizzes)

Observing the safety rules will help __________?

Protect you from electrical shock

The mode of operation when a machine repeats is commonly called the __________ cycle mode.

continuous

In a(n) __________ control system, the logic is performed by components called relays.

non-servo

A single normally closed switch forms the _____ logic element.

NOT

When two or more normally open switches are wired in parallel, it forms a(n) _____ logic element.

OR

When two or more normally closed switches are wired in parallel, it forms a(n) _____ logic element.

NAND

When normally closed contacts are energized, the switch __________.

Opens and current does not pass

What is the correct sequence of steps in a control system's process?

Input, Logic, Output

The electrical sensor is used in the __________ control system.

Automatic

When two or more normally closed switches are wired in series, it forms a(n) _____ logic element.

NOR

A relay is a special type of __________.

Switch

__________ control systems require an operator to command each move.

Manual

The series of moves a machine makes to perform its job is called a(n) __________.

Sequence of operation

The __________ is the commonly used component for the memory logic element.

Control relay

When two or more normally open switches are wired in series, it forms a(n) _____ logic element.

AND

__________ electricity is used for electrical control of fluid power systems.

AC & DC

A(n) __________ is an input device that allows the operator to open and close an electrical circuit.

Manual switch

The __________ are typical components of an automatic machine that perform the machine's movement.

Actuators

__________ form the building blocks to create very complex sequences.

Logic elements

The __________ is the electrical circuit component that connects the other components together.

Conductor

The __________ switch is often used to change machine modes.

Selector

The __________ of a fluid power machine is used to stop and start the operation, extend and retract actuators, and sense and guide actuator motion.

Control system

The __________ is used to show devices such as valves, motors, and cylinders.

Ladder diagram

The mushroom head operator is reserved for functions such as __________.

Emergency stop

The four major components of a ladder diagram are the power supply, conductors, __________,__________.

Inputs & Outputs

A(n) _____ in a CAM chart indicates that the contacts of a selector switch are closed when the switch is in the position represented by the box.

X

The typical indicator light condition for an abnormal condition is __________ light on.

Red

The __________ is used to describe electrical circuits.

Ladder diagram

Indicator lights are most often located on the ___________.

Operator station

The best method of reading a ladder diagram is to start at __________.

The upper left of the first rung and move right

Pushbutton switches are used in control systems __________.

To manually send input signals to the controller

Three or more positions of a switch can be accomplished using the __________.

Selector switch operator

The __________ is used to show devices such as valves, motors, and cylinders.

Power diagram

The pushbutton switch consists of two basic parts: the contacts and the __________.

Operator

__________ are often used to convert the higher levels of voltage transmitted by the power company into lower voltages that can be more easily and safely used in homes, businesses, and manufacturing facilities.

Transformers

If a two-position solenoid-operated valve has only one solenoid, a(n) __________ is used to return the spool to the deenergized position.

Spring

A short circuit is a condition of __________.

High current flow Near zero resistance

Electrically operated hydraulic DCVs are used to control the motion of __________.

Motors and cylinders

A __________ is used where overloads commonly occur, such as the electrical panel in your house.

Circuit breaker

By pushing on a pneumatic solenoid valve's manual overrides, a person may __________ the valve.

Shift

Hydraulic solenoid valves are equipped with one or more __________ to allow the valve to be manually shifted.

Manual overrides

The pilot-operated method of the solenoid-operated pneumatic DCV uses the __________ movement to divert air flow to the end of the spool, causing it to shift.

Solenoid plunger

The function of a power diagram is to show the __________.

Connections of the power devices

An application where electro-pneumatic controls are used is __________.

Conveyor systems, Food processing machinery, Robotic grippers

A(n) __________ is used to protect the power supply and its components from damage due to excessive current flow.

Fuse

A solenoid-operated pneumatic DCV uses a(n) __________ to shift.

Direct-operated or Pilot-operated

The __________ of a transformer is a ferromagnetic material capable of conducting a magnetic field

Core

In its simplest form, a(n) __________ is a coil of wire with an iron rod called a plunger.

Solenoid

Standard industry practice is to carry the flow of electricity to a solenoid through __________ that are designed for heavier duty service.

A set of relay contacts

On a ladder diagram, a normally open contact symbol of a control relay is shown as __________.

Two parallel lines perpendicular to the conductor

The machine control relay performs the same types of functions as the general purpose relay but is instead designed for __________.

Heavy-duty applications

A uni-directional motor's output can be measured in __________.

Torque

The __________ is used most often as a memory logic element in electrical control circuits.

Control relay

The number of throws a relay has depends on the number of different __________.

Closed contact positions

A general purpose realy is designed mainly for __________.

Low-cost / light-duty applications

A control relay uses its __________ to perform control logic based on certain input conditions.

Contacts

A bi-directional motor can be operated in both directions by using a __________ valve.

Double-solenoid, three-position

The term seal-in refers to a special __________.

Wiring method

In most control circuits, the National Electric Code requires that the __________ input be the first input in the circuit.

Stop

To protect a limit switch from dirt, a(n) __________ is used.

Enclosure

To control two cylinders that are not attached to the same machine member, __________ limit switch(es) must be used.

Two

To wire a limit switch to pass current when activated, the terminals are __________.

Common, N.O

__________ is/are used as the best way to synchronize multiple cylinders that must travel together.

A mechanical yoke

Many machines use __________ usually to provide more force.

multiple cylinders

A __________ switch senses the actuator position on an automatic machine.

Limit

A single cycle reciprocation circuit requires a minimum of _____ control relay(s) and _____ limit switch(es).

1;1

A continuous cycle reciprocation circuit requires a minimum of _____ control relay(s) and _____ limit switch(es).

2;2

The distance that a limit switch moves from its normal position before its contacts actuate is called the __________.

Pretravel

A normally open limit switch contact that is held closed is __________.

De-activated when the actuator moves from the switch

A limit switch with 3 terminals is known as __________ switch.

Single pole- double throw (SPDT)

A __________ reciprocation occurs when a machine's cylinders extend and retract only once upon cycle start.

Single cycle