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Massachusetts-Electric Signs Online Practice Test

These are actual questions from our online practice test.

We have included a question from each chapter of the test. Every question will be multiple choice. The answers are not included with the sample.

Sample Questions

# Chapter Title Question
1 Fluorescent, LED, HID Fabrication, Tubes and Electrical Flow

In a discharging battery or a galvanic cell, the cathode is the positive terminal since that is where the current flows out of the device (see drawing). This outward current is carried internally by positive ions moving from the electrolyte to the positive cathode (chemical energy is responsible for this "____________" motion). 

 

2 Sign Design and Mounting

A _________________ is electrical equipment that takes available voltage and current at a site and converts it to the levels required by elements in the signage.

3 Troubleshooting and Repair

The thermoplastic used to mold many common cheap connectors softens or melts at relatively low temperatures. This can result in the pins popping out or shifting position (even shorting) as you attempt to solder to them to replace a bad connection. One approach that works in some cases is to use the _____________ socket to stabilize the pins so they remain in position as you solder. The plastic will still melt - not as much if you use an adequately sized iron since the socket will act as a heat sink - but will not move.

4 Components

 The voltage and current ratio of autotransformers can be formulated the same as other two-winding transformers:

frac{V_1}{V_2}=frac{N_1}{N_2} = a

(0<V2<V1)

The ampere-turns provided by the upper half:

F_U = (N_1 - N_2)I_1 = (1-frac{1}{a})N_1I_1

The ampere-turns provided by the lower half:

F_L = N_2(I_2 - I_1) = frac{N_1}{a}(I_2-I_1)

For ampere-turn balance, FU=FL:

(1-frac{1}{a})N_1 I_1 = frac{N_1}{a}(I_2-I_1)

Therefore:

frac{I_1}{I_2} = frac{1}{a}

5 Fiber Optics _________________ is the phenomenon in which the phase velocity of a wave depends on its frequency, or alternatively when the group velocity depends on the frequency.
6 Conduits, Voltmeters, Ammeter and Ohmmeter Plenum rated cable for CATV is marked with?
7 Definitions

A ________________________ is a  valve on a vacuum pump used to admit air in the compression stage of pumping. Useful in removing air and moisture trapped in the vacuum oil, the gas ballast valve should be closed during normal pump operation. 

8 Electrical Safety

Portable or mobile signs must be adequately supported and readily movable without the use of tools . Each portable or mobile sign must have an attachment plug. Remember that 400.8(2) and (5) prohibit flexible cords from being run through (or above) a suspended ____________.

9 Safety, Dig Alert, Asbestos Code of Federal Regulations, Title 29, Part 1926 and Fire Extinguishers On a jobsite, you have to have a fire extinguisher for safety purpose within:
10 Regulations and Contracts ___________ are amendments to the existing contract for work added, deleted or changed.
11 Bid Preparation, Estimating, Basic Blueprint Reading and Plans The notice to owner contained in a contract, informs the customer of _________________.
12 Mathematics and Calculations

When the 5 k potentiometer in this circuit is set to its 0%, 25%, 50%, 75%, and 100% positions, the following output voltages are obtained (measured with respect to ground, of course): 
 


 

At 0% setting, Vout = 0 V
At 25% setting, Vout = 2.5 V
At 50% setting, Vout = 5 V
At 75% setting, Vout = 7.5 V
At 100% setting, Vout = 10 V


Calculate what the output voltages will be if a 1 k? load resistor is connected between the "Vout" terminal and ground: 
 


 

At 0% setting, Vout =
At 25% setting, Vout =
At 50% setting, Vout =
At 75% setting, Vout =
At 100% setting, Vout =
13 Example Test: San Jose, CA Codes - Sign Criteria / Always Check City or County Codes Where Your Project Will Be

Regarding code 23.02.940

 Attached signs on walls, windows or other structures shall be located a minimum of _________ inches from the edge of the wall, window or structure to which attached, unless the sign continues around such edge and onto another contiguous surface.



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