Motor Control

Question 1

What is the least number of rollers you should use under a load on a skid?

Answer 1

3

Question 2

If new equipment is damaged and shipment you should report it to the?

Answer 2

Carrier

Question 3

What type of wrench should you use for tightening anchor bolts?

Answer 3

Torque

Question 4

Which of the following determine the speed of response for the proximity limit switch using an oscillator in the output circuit

Answer 4

The oscillator frequency

Question 5

What is a solenoid current and amps with the plunger in the close position

Answer 5

Sealed or holding current

Question 6

What design features are improve with the oil immersed solenoid?

Answer 6

Heat dissipation and wear conditions are improve through the use of oil immersed Solenoids.

Question 7

Name two important functions of the memory selection of the PLc processor?

Answer 7

Both A and B (remember info that processor may need to make decisions remembers the instruction given by the user telling the POC what to do)

Question 8

In a given transformer the voltage is reduced from the primary to the secondary what is this transformer called

Answer 8

Step down transformer

Question 9

How is the effective voltage applied to a motor using a solid-state reduce voltage starter controlled

Answer 9

Through controlling the conduction of the silicon controlled rectifiers

Question 10

Under what conditions does a step in motor advance one step?

Answer 10

Each time the motor is the Deenergized

Question 11

The term differential when referring to a pressure switch means

Answer 11

The term differential between the actuation and the re-actuation points

Question 12

The two types of timers most frequently used in industrial machines are the synchronous motor driven and the solid state

Answer 12

True

Question 13

Why do some systems require a back up battery power source for the processor memory

Answer 13

Enable the processor memory to maintain a program in the event that the main power sources lost

Question 14

Why is the inverse time characteristic of a fuse important

Answer 14

It parallel’s the characteristics of Conductors motors transformers and other electrical apparatus

Question 15

In the double solenoid operating valve what keeps the spool in a center position when both solenoids are Deenergized

Answer 15

The valves pool is kept in a center position by Springs located of each end of the valve

Question 16

What is meant by regulation in a transformer

Answer 16

The difference between the no-load and full load voltage as a percent of full load voltage

Question 17

Why is it that more than one set of overload relays are used in a multi speed motor starter

Answer 17

Due to the change in horsepower when the speed of a motor changes it is necessary to supply the two sets of overload for it adequate protection.

Question 18

What characteristics is most important and the rubber coating of wire an extension cords

Answer 18

Flexibility

Question 19

What is advantage of panel mounting a contact block

Answer 19

The mounting provide space for terminal block is installations

Question 20

A liquid has a _ shape and _volume

Answer 20

Changeable, fixed

Question 21

Convection heat is the

Answer 21

Transfer of heat by Fluids

Question 22

The solvent_, should not be used for cleaning because it is highly flammable and irritate skin

Answer 22

Gasoline

Question 23

At room temperature carbon is chemically

Answer 23

Inert

Question 24

Answer: 23^7/_8in.x26^7/_8in

Question 25

Kilograms per cubic meter is a unit of metric measurement for

Answer 25

Density

Question 26

You can use lead sheet or plastic film for

Answer 26

Reducing vibration of pipes or ducks

Question 27

Fires involving electrical equipment and wiring are designated?

Answer 27

Class c

Question 28

Excess Noise on the electrical and tools often indicates

Answer 28

Carbon brush problems

Question 29

Machinability is a speed and ease which a metal

Answer 29

Can be cut on a machine tool

Answer 30

Chemical composition steel

Question 31

The ratio of a Material density to the density of water is called a

Answer 31

Specific gravity

Question 32

Magnesium parts should be gas welded

Answer 32

Only in emergencies

Question 33

An alloy containing iron as a base metal is

Answer 33

Steel

Question 34

Malleable cast Iron is _ than white cast iron and has _ resistance to water then?

Answer 34

Softer, more

Question 35

Steels that are_generally have a_Content

Answer 35

Forged, low

Question 36

The most important element added to iron and making steel is

Answer 36

Carbon

Question 37

Which of the following should you use as a lubricant when machining zinc

Answer 37

Lard oil

Question 38

To avoid sharp bending and abrasion The eye of a fiber rope sling should include a

Answer 38

Thimble

Question 39

What is the way of a 36 foot American standard I beam designed 515×42. Nine? Use equation W times W/Ft times L

Answer 39

1544.4 lbs C

Question 40

Which of the following identifications would be most likely to appear on the links of a chain suitable for overhead lifting

Answer 40

800

Question 41

The following factors all Affect Wire Rope strength. In which one is the d/d ratio important

Answer 41

Bending over a curved surface

Question 42

Which of the wire rope end fittings is the most efficient assuming all are prepared correctly

Answer 42

Speltered socket

Question 43

The height of a movable sectional MetalScaffold that measures 4 x 8’ at the base should not exceed

Answer 43

16

Question 44

When a rigger left a load a few inches then stops to see if the load drifts downword what is he checking

Answer 44

Hoist brakes

Question 45

When working with floor operated hoist and cranes you should make sure that

Answer 45

Obstructions can be cleared by the moving load

Question 46

The rated load capacity or capacity of an encased polyester sling is indicated by the

Answer 46

Color and of the cover

Question 47

If a sling leg is attached to a suspended load at an angle of less than 90° the horizontal force acting on the sling leg

Answer 47

Increases as the sling angle gets smaller

Question 48

To support a lever across machine tools

Answer 48

Gauge block