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MECHANICS EXAM NEIEP NEWEST 2025 ACTUAL
EXAM TEST BANK| COMPLETE 400 REAL EXAM
QUESTIONS AND CORRECT DETAI LED ANSWERS
(VERIFIED ANSWERS) GRADED A+ (BRAND NEW!!)
Which safety device detects small imbalances between the hot and neutral current carrying conductors? - ANSWER - GFCI
The symbol E is used to represent what? - ANSWER - Voltage
Two negative charges placed next to each other will... - ANSWER - Repel each other
One ampere equals ____ - ANSWER - 1,000 mA
The difference of electrical potential between two points is called... - ANSWER - Voltage
What is equivalent to 35 microamps? - ANSWER - .000035 amperes
What happens to the total resistance in a wire if its length is doubled? - ANSWER - The resistance is doubled
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pg. 2 What happens to the total resistance in a wire if its cross sectional area is increased by four times? - ANSWER - The resistance is one fourth of what it was originally.
solve:
-863 x -1224 - ANSWER - +1,056,312
Calculate the resistance in a circuit if the voltage is 24 VDC and 40 watts of power are consumed. - ANSWER - 14.4 Ohms
What will happen to the current in a circuit of constant voltage if the resistance is halved? - ANSWER - The current will double
How should ohmmeters be used to take measurements in a circuit? - ANSWER - Connected in parallel across the load with one lead of the load to be measured disconnected.
How should voltmeters be used to take measurements in a circuit? - ANSWER - Connected in parallel across the load to be measured disconnected
What will happen to the current of a constant voltage if the resistance is doubled? - ANSWER - The current will be halved
Calculate the voltage in a circuit with 87 ohms of resistance and .225 amperes of current flowing in it. - ANSWER - 19.575 2 / 4
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pg. 3 If the current is 120mA and the voltage is 245 VDC, what is the amount of power consumed by this circuit? - ANSWER - 29.4 Watts
If a circuit is rated to use 1478 Watts and the source voltage is 68 volts, what is the resistance in the circuit? - ANSWER - 21.74 amps
How should ammeters be used to take measurements in a circuit? - ANSWER - connected in series with the circuit
What does the designation DPDTNO switch represent? - ANSWER - Double Pole- Double Throw- Normal Open Switch
Switches are generally rated by the maximum ____ across the contacts when the switch is open and the maximum ____ through the switch when it is closed. - ANSWER - Voltage, Current
What type of resistor is often found in door operators where it can be used to control the voltage available to the motor fields? - ANSWER - Wire Wound Adjustable Resistor
What is the maximum amount of resistance that would be found on a 4.7K ohm resistor with 20% tolerance? - ANSWER - 3760 ohms
All electrical tools should be checked... - ANSWER - regularly
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pg. 4 You are putting up a stringer of lights in a hoist way with lights spaced at 6 foot intervals. If using 100 watt light bulbs, how many feet of the houstway can you cover before tripping the breaker on a 20A circuit? - ANSWER - 144 feet
The ____ is the same across all branches of a parallel circuit. - ANSWER - voltage
You are taking a night call and your troubleshooting leads you to find a burnt out resistor. The original resistor was 215Ohms. You do not have a 215Ohm resistor on site. Which combination of resistors could you use to get the car running again? - ANSWER - 90Ohm, 75Ohm, and 50Ohm wired in series
The ease with which magnetic lines of force distrubute themselves throughout a material is known as ____ - ANSWER - Permeability
The point at which a given piece of material contains all the lines of force it can hold is called ____. - ANSWER - Saturation
Current flows from left to right on a conductor, what is true of the magnetic lines of force? - ANSWER - The magnetic lines of force will be in the counterclockwise direction.
____ measures current in a circuit without disconnecting wires. - ANSWER - Clamp-on meter
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