Book #7

Question 1

When referring to the capacity of communication cable, what does the term attenuation refer to?

Answer 1

The ratio of signal strength at the transmitting and receiving ends of the cable

Question 2

What type of equipment should you use when installing a wall mounted light at 5m in a closed stairwell

Answer 2

Bakers platform

Question 3

What causes a 3-phase motor to single-phase

Answer 3

An open line fuse

Question 4

Why cant stainless steel be used as bonding material?

Answer 4

It is a material having a high resistivity value

Question 5

To whom should the as-built drawings, short circuit study, coordination study and calibration test results be submitted to?

Answer 5

Engineer

Question 6

A fuse has t5he following stamped on the body of the fuse, 200a, 600v, 12kaic HRCI-MISC what does the 200a stand for

Answer 6

Amps of continuous current

Question 7

What device is used to limit high temperature in a hydronic heating system?

Answer 7

Aquastat

Question 8

What field marked label dictates the personal protection equipment required for a service panel?

Answer 8

Arc Flash sticker

Question 9

When examining a circuit board in an enclosure, oxidization was found on the circuit board. what is the most probable cause of oxidization?

Answer 9

Moisture is getting on the board

Question 10

When performing scheduled preventative maintenance to locate overheating joints and sections of insulation deterioration, What type of instrument should you employ?

Answer 10

thermography

Question 11

What type of of DC motor should not be used for belt drive applications?

Answer 11

Series

Question 12

The purpose of a shading coil is to:

Answer 12

Prevent chatter and AC hum

Question 13

A newly installed overload relay device causes frequent tripping, what should you do?

Answer 13

Change current rating

Question 14

A magnetic blow-out coil is connected?

Answer 14

In series with the load

Question 15

What kind of meter is used to test the specific gravity of a lead-acid battery?

Answer 15

Hydrometer

Question 16

The most common heat sensing device used in room thermostats is the:

Answer 16

Bimetal strip

Question 17

How do you safely dry out a damp air cooled dry type transformer?

Answer 17

Apply a small amount of voltage to primary under no load condition

Question 18

A long spiral bimetal strip is desirable because:

Answer 18

exhibits more movement with a change of heat

Question 19

To reverse a standard split-phase dual voltage motor, which wiring connections are interchanged?

Answer 19

T5 and T8

Question 20

Which leads have to be interchanged in order to reverse a cumulative compound motor?

Answer 20

A1 and A2

Question 21

What is the main purpose of the heat anticipator in a low-voltage thermostat?

Answer 21

to prevent overshooting of the preset temperature

Question 22

For the installation of HVAC controls, what is normally determined by referencing electrical drawings?

Answer 22

location of thermostats

Question 23

What would result if the correct polarity will not be observed during the installation of the signaling device of a class B fire alarm system?

Answer 23

Trouble signal will sound

Question 24

When connecting a residential extra-low voltage thermostat, what does the G terminal designate?

Answer 24

Fan

Question 25

What is the most important information marked on a lock-out tag?

Answer 25

Workers name

Question 26

On what type of drawings would you find information on the building footings?

Answer 26

Structural

Question 27

When replacing a 15kv damaged underground cable, what type of splice is required?

Answer 27

Semi-con splice

Question 28

If there is a safety hazard on site, who is required to correct the violation?

Answer 28

Employer/employee

Question 29

An ohmmeter is connected across an overload heater and the reading indicates infinity, the overload heater is?

Answer 29

Open
Functional @ zero volts

Question 30

Where do you reset a nurse call station?

Answer 30

Activation point

Question 31

When installing a lamp and you want to change the direction of illumination, what do you adjust?

Answer 31

Light refractor

Question 32

What safety switch shuts off the igniter in a gas furnace?

Answer 32

High limit