Deck 12: Industrial Electrical Applications

Question 1

Cable trays containing conductors that operate at over 600 volts are to be clearly marked at regular intervals to indicate that the contents are high-voltage cables.The specific marking is to state "Danger - High Voltage - Keep Away"

Answer 1

True

Question 2

A(n) ____________________ is a junction of two dissimilar metals which produces a small voltage that changes as the temperature changes.

Answer 2

thermocouple

Question 3

A conductive optical fiber cable for general-purpose use is marked as Type ____________________.

Answer 3

OFC

Question 4

____________________ uses a ferromagnetic envelope attached to a pipeline or vessel, and electrical current flow through the envelope produces the heat.

Question 5

What does 'ER' represent in Type ITC-ER?

Question 6

When is the dielectric process used?

Question 7

What is a cable tray?

Question 8

A single solid aluminum conductor not smaller than 250 kcmil is permitted in the cable, or the conductor is permitted to be formed using up to nineteen 250-kcmil solid aluminum rods laid parallel.

Question 9

In a cable tray when the minimum spacing is maintained, a(n) ____________________ cable tray is frequently required.

Question 10

What is the meaning of 'R' in Type OFNR?

Question 11

The minimum permitted ampacity of circuit conductors is required to be ____________________% of the total load of the heaters.

Question 12

The width of the cable tray is equal to the difference between the diameters of the cables.

Question 13

When multiconductor cables of different sizes are placed in a cable tray together, the method of determining the width of the cable tray required depends upon the ____________________ of the conductors in the cables.

Question 14

If voltage drop is an issue, then a(n) ___________________ wire size may be necessary.

Question 15

A welder is not to be considered as a separately derived premises system.

Question 16

What are the permissible conductor materials for Type ITC cable?

Question 17

A(n)___________________ is a factory-made cable and ventilated metal framework system that is usually field-assembled.

Question 18

What is an impedance heating system?

Question 19

A nonconductive optical fiber cable for general-purpose use is marked as Type OFC.

Question 20

Assume an aluminum ladder-type cable tray has a load classification 10C.What does this load classification imply?