# Technical Subject Rme

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| By Miguel Taleon
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Miguel Taleon
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Quizzes Created: 1 | Total Attempts: 1,940
Questions: 224 | Attempts: 1,940

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• 1.

• A.

RA 7920

• B.

RA 184

• C.

RA 154

• D.

RA 1378

B. RA 184
• 2.

### The electromotive force required to cause a current to flow may be obtained __________. I. Thermally II. Mechanically III. Chemically

• A.

A. I only

• B.

B. I & III only

• C.

C. II & III only

• D.

D. I, II, & III

D. D. I, II, & III
Explanation
The correct answer is d. I, II, & III. The electromotive force required to cause a current to flow can be obtained through various means. Thermally, it can be obtained through the temperature difference between two points in a thermocouple. Mechanically, it can be obtained through the motion of a magnet in a generator. Chemically, it can be obtained through chemical reactions in a battery. Therefore, all three options are valid ways to obtain the electromotive force required to cause a current to flow.

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• 3.

### Frequency is measured in __________.

• A.

a. Hertz

• B.

B. Voltage

• C.

C. RPM

• D.

D. Foot pounds

A. a. Hertz
Explanation
Frequency is a measure of how often an event occurs in a given time period. It is commonly used to measure the number of cycles or vibrations per second in a wave or oscillation. The unit used to measure frequency is Hertz (Hz). Hertz is defined as one cycle per second, indicating the number of occurrences of an event in one second. Therefore, the correct answer is a. Hertz.

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• 4.

• A.

RA 7920

• B.

RA 154

• C.

RA 1378

• D.

RA 184

A. RA 7920
• 5.

### When was RA 7920 approved?

• A.

February 23, 1995

• B.

February 24,1998

• C.

February 25,1995

• D.

February 24,1995

D. February 24,1995
Explanation
RA 7920, also known as the Philippine Ocular Drug Act, was approved on February 24, 1995. This law regulates the sale, distribution, and use of ocular drugs in the Philippines.

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• 6.

### How many set of plans are required to secure an electrical permit?

• A.

5

• B.

4

• C.

Option 3

• D.

Option 4

A. 5
Explanation
An electrical permit typically requires five sets of plans to be submitted. Each set of plans is reviewed by different departments or agencies involved in the permitting process, such as the electrical, building, and fire departments. Having multiple sets of plans allows each department to review the plans simultaneously, expediting the permitting process.

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• 7.

### The following are allowable sizes for electrical plans, which is not included?

• A.

760mm x 500mm

• B.

600mm x 900mm

• C.

760mm x 1000mm

• D.

780mm x 420mm

D. 780mm x 420mm
Explanation
The given options list various sizes for electrical plans, and the correct answer is 780mm x 420mm. This size is not included in the list provided.

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• 8.

### What is the allowable size for dwelling units with less than 50 sqm floor area

• A.

500mm x 760mm

• B.

297mm x 420mm

• C.

500mm x 1000mm

• D.

600mm x 900mm

B. 297mm x 420mm
• 9.

### How many VA is allowable for dwelling units less than 50 sqm

• A.

3680VA

• B.

4600VA

• C.

2760VA

• D.

5520VA

A. 3680VA
Explanation
The correct answer is 3680VA. This is the allowable VA (volt-ampere) for dwelling units that are less than 50 sqm. VA is a unit used to measure apparent power, which is the combination of real power (measured in watts) and reactive power (measured in volt-amperes reactive). In this case, the question is asking for the maximum allowable VA for smaller dwelling units, and the correct answer is 3680VA.

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• 10.

### What is the minimum entrance dimension for working space under 1000V

• A.

600mm x 2100mm

• B.

600mm x 2000mm

• C.

600mm x 2200mm

• D.

700mm x 2100mm

B. 600mm x 2000mm
Explanation
The minimum entrance dimension for working space under 1000V is 600mm x 2000mm. This means that the entrance must have a width of 600mm and a height of 2000mm in order to provide enough space for safe access and maneuverability in the area.

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• 11.

### What is the minimum width of working space

• A.

680mm

• B.

750mm

• C.

900mm

• D.

550mm

B. 750mm
Explanation
The minimum width of working space is 750mm. This measurement is necessary to ensure that there is enough room for individuals to comfortably and safely perform tasks without feeling cramped or restricted. It allows for proper movement and maneuverability, reducing the risk of accidents or injuries. A wider working space also provides the flexibility to accommodate various equipment or tools that may be needed for the task at hand. Therefore, 750mm is the minimum width required to create an efficient and ergonomic working environment.

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• 12.

### For dwelling units less than 200A, what is the permissible height for working space?

• A.

2100mm

• B.

2000mm

• C.

1900mm

• D.

1850mm

B. 2000mm
Explanation
The permissible height for working space in dwelling units less than 200A is 2000mm. This means that the minimum height required for the working space in these units is 2000mm, ensuring that there is enough clearance for safe and convenient access to electrical equipment.

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• 13.

### Limited Access. for operating at 1000v, nominal or less, what is the size of lay-in manhole

• A.

559mm x 559mm

• B.

559mm x 762mm

• C.

558mm x 558mm

• D.

762mm x 558mm

A. 559mm x 559mm
Explanation
The size of the lay-in manhole for operating at 1000v, nominal or less, is 559mm x 559mm.

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• 14.

### Limited Access. Operating at 1000v, nominal or less, what is the size of crawl space?

• A.

559mmx559mm

• B.

650mmx759mm

• C.

559mmx762mm

• D.

762mmx762mm

C. 559mmx762mm
Explanation
The correct answer is 559mmx762mm. This size of crawl space is suitable for operating at 1000v or less.

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• 15.

### What is the height of dedicated electrical space?

• A.

1900mm from floor to top of equipment

• B.

2100mm from floor to top of equipment

• C.

1800mm from floor to top of equipment

• D.

2500mm from floor to top of equipment

C. 1800mm from floor to top of equipment
Explanation
The height of dedicated electrical space is 1800mm from floor to top of equipment.

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• 16.

### What is the minimum elevation above floor for live parts protection against accidental contact for 50v - 300v between ungrounded conductors?

• A.

2500mm

• B.

2600mm

• C.

2400mm

• D.

2800mm

A. 2500mm
Explanation
The minimum elevation above the floor for live parts protection against accidental contact for 50v - 300v between ungrounded conductors is 2500mm. This means that any live parts carrying a voltage between 50v and 300v should be placed at a height of at least 2500mm above the floor to prevent accidental contact and ensure safety.

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• 17.

### What is the minimum elevation above floor for live parts protection against accidental contact for 301v - 600v between ungrounded conductors?

• A.

2500mm

• B.

2600mm

• C.

2700mm

• D.

2400mm

B. 2600mm
Explanation
The minimum elevation above the floor for live parts protection against accidental contact for voltages between 301V and 600V between ungrounded conductors is 2600mm. This means that any live parts within this voltage range must be located at a height of at least 2600mm from the floor to ensure safety and prevent accidental contact.

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• 18.

### What is the minimum elevation above floor for live parts protection against accidental contact for 601v - 1000v between ungrounded conductors?

• A.

2500mm

• B.

2600mm

• C.

2620mm

• D.

2700mm

C. 2620mm
Explanation
The minimum elevation above the floor for live parts protection against accidental contact for 601v - 1000v between ungrounded conductors is 2620mm. This height ensures that there is sufficient distance between the live parts and the floor to prevent accidental contact, reducing the risk of electrical shock or injury.

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• 19.

### For outdoor installation over 1000v nominal, what is the required height of fence?

• A.

230cm

• B.

210cm

• C.

250cm

• D.

260cm

B. 210cm
Explanation
The required height of the fence for outdoor installation over 1000v nominal is 210cm. This height is likely determined by safety regulations or standards that aim to prevent unauthorized access and ensure the safety of individuals near the installation. By setting the fence at 210cm, it creates a physical barrier that helps to deter people from getting too close to the high-voltage equipment, reducing the risk of accidents or injuries.

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• 20.

### For electrical vaults, what is the required fire rating?

• A.

3 hours

• B.

4 hours

• C.

2 hours

• D.

1 hour

A. 3 hours
Explanation
Electrical vaults are designed to protect electrical equipment and wiring from fire hazards. They are constructed with fire-resistant materials and must have a required fire rating to ensure the safety of the equipment. A fire rating indicates the amount of time the vault can withstand a fire without compromising its integrity. In this case, the correct answer is 3 hours, which means that the electrical vault should be able to withstand a fire for at least 3 hours before any damage occurs. This extended fire resistance allows for sufficient time to control and extinguish the fire, minimizing the risk of damage to the electrical equipment and preventing the spread of fire to other areas.

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• 21.

### For electrical vault, what is the minimum thickness of the floor slab?

• A.

125mm

• B.

100mm

• C.

150mm

• D.

90mm

B. 100mm
Explanation
The minimum thickness of the floor slab for an electrical vault is 100mm. This thickness is necessary to provide adequate strength and support for the vault, ensuring that it can withstand the weight of equipment and any potential loads or stresses. A thicker floor slab would be even stronger, but the minimum requirement is 100mm to meet the necessary structural requirements.

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• 22.

### Over 1000v, what is the distance from fence to live parts with nominal voltage 1001v - 13,799v

• A.

4.57m

• B.

3.05m

• C.

5.49m

• D.

6.24m

B. 3.05m
Explanation
The distance from the fence to the live parts with a nominal voltage between 1001v and 13,799v is 3.05m. This means that there should be a minimum distance of 3.05 meters between the fence and the live parts to ensure safety.

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• 23.

### Over 1000v, what is the distance from fence to live parts with nominal voltage 13,800v - 230,000v

• A.

4.57m

• B.

3.05m

• C.

5.49m

• D.

6.25m

A. 4.57m
Explanation
The correct answer is 4.57m. This distance is the minimum required clearance between the fence and the live parts with a nominal voltage range of 13,800v to 230,000v. It ensures the safety of individuals and prevents any potential electrical hazards.

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• 24.

### Over 1000v, what is the distance from fence to live parts with nominal voltage over 230,000

• A.

5.50m

• B.

5.48m

• C.

5.49m

• D.

5.51m

C. 5.49m
Explanation
The correct answer is 5.49m. This suggests that the distance from the fence to the live parts with a nominal voltage over 230,000 is 5.49 meters.

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• 25.

### A 3 - hour fire resistant wall is ____ thick concrete wall.

• A.

100mm

• B.

150mm

• C.

125mm

• D.

160mm

B. 150mm
Explanation
A 3-hour fire resistant wall is typically a wall that can withstand fire for a duration of 3 hours without collapsing or allowing fire to pass through. In order to achieve this level of fire resistance, the wall needs to be constructed with materials that have high fire resistance properties. Concrete is a commonly used material for fire resistant walls due to its ability to withstand high temperatures. A thickness of 150mm is generally considered sufficient to provide the necessary fire resistance for a 3-hour fire resistant wall.

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• 26.

### _____________ can be generated. I. Electricity II. Electrical Energy

• A.

I only

• B.

II only

• C.

Both I and II

• D.

Neither I nor II

B. II only
Explanation
Electrical energy can be generated, as it refers to the energy produced by the movement of electric charges. Electricity, on the other hand, is the flow of electrical power or the presence and flow of electric charge. While electricity is a form of electrical energy, it is not the only way to generate electrical energy. Therefore, the correct answer is II only.

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• 27.

### The phenomenon whereby a circuit stores electrical energy is called ____________.

• A.

Inductance

• B.

Capacitance

• C.

Resistance

• D.

Susceptance

B. Capacitance
Explanation
Capacitance is the correct answer because it refers to the ability of a circuit to store electrical energy in an electric field. Capacitors, which are used in circuits to store and release electrical energy, rely on capacitance. Inductance, on the other hand, refers to the ability of a circuit to store energy in a magnetic field, while resistance refers to the opposition to the flow of electrical current. Susceptance is not directly related to the storage of electrical energy.

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• 28.

### A general term including material, fittings, devices, appliances, fixtures, apparatus, and the like used as a part of, or in connection with, an electrical installation is ______.

• A.

Premises wiring (system)

• B.

Service Equipment

• C.

Utilization Equipment

• D.

Equipment

D. Equipment
Explanation
The term "equipment" is a general term that encompasses various components used in an electrical installation. It includes materials, fittings, devices, appliances, fixtures, and apparatus. This term is used to refer to any item that is utilized as a part of or in connection with an electrical installation. It is a broad category that covers a wide range of items and is not specific to any particular type of component or system.

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• 29.

### A switch intended for use in general distribution and branch circuits. it is rated in amperes, and it is capable of interrupting its rated current at its rated voltage, is a _________ switch.

• A.

Bypass isolation

• B.

General Use

• C.

Isolating

• D.

Transfer

B. General Use
Explanation
A switch intended for use in general distribution and branch circuits is referred to as a "General Use" switch. This type of switch is rated in amperes and is capable of interrupting its rated current at its rated voltage. It is designed to be used in various applications and is not specific to a particular purpose or function.

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• 30.

### The permanent joining of metallic parts to form an electrically conductive path that will ensure electrical continuity and the capacity to conduct safely any current likely to be imposed is known as _________________.

• A.

Ordinary tap joint

• B.

Scarf Joint

• C.

Britannia Joint

• D.

Bonding

D. Bonding
Explanation
Bonding refers to the permanent joining of metallic parts to form an electrically conductive path. This ensures electrical continuity and the ability to safely conduct any current that may be imposed. It is an essential process in various industries, such as electrical and automotive, where the secure connection of metal components is crucial for proper functioning and safety.

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• 31.

### An instrument that is used to measure the diameter of a wire or cable to thousandths of an inch.

• A.

Galvanometer

• B.

Micrometer

• C.

Hydrometer

• D.

Ruler

B. Micrometer
Explanation
A micrometer is a precision instrument that is commonly used to measure the diameter of small objects, such as wires or cables, to a very high degree of accuracy. It can measure dimensions to thousandths of an inch, making it suitable for measuring the diameter of a wire or cable. A galvanometer is used to measure electric currents, a hydrometer is used to measure the density or specific gravity of liquids, and a ruler is a simple measuring tool that typically does not provide the level of precision required for measuring the diameter of a wire or cable.

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• 32.

### In general, motors are design to operate in a maximum ambient temperature of ____________ unless specifically designed for a higher temperature.

• A.

60°C

• B.

50°C

• C.

45°C

• D.

40°C

D. 40°C
Explanation
Motors are typically designed to operate in a maximum ambient temperature of 40Â°C unless they are specifically designed for higher temperatures. This means that if the ambient temperature exceeds 40Â°C, the motor may not be able to function properly or efficiently. It is important to consider the ambient temperature when selecting and using motors to ensure their optimal performance and longevity.

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• 33.

### A type of single phase motor that can be operated on either AC or DC is a ___________ motor.

• A.

Multispeed

• B.

Capacitor-start

• C.

Universal

• D.

Repulsion-induction

C. Universal
Explanation
A universal motor is a type of single phase motor that can be operated on either AC or DC. It is designed to work with both types of current by using a special type of winding and a commutator. This makes it versatile and suitable for a wide range of applications where the power source may vary.

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• 34.

### For screw shell devices with attached leads, the conductor attached to the screw shell shall be ________ in color.

• A.

White or gray

• B.

Orange

• C.

Green

• D.

Black

A. White or gray
Explanation
The conductor attached to the screw shell of a device should be white or gray in color. This is because white or gray is the standard color coding for neutral or grounded conductors in electrical wiring. By using white or gray, it helps to ensure consistency and proper identification of the neutral conductor, which is an important safety measure in electrical installations.

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• 35.

### Branch circuit conductors shall have an ampacity not less than __________.

• A.

• B.

100% of the load to be served

• C.

80% of the load to be served

• D.

B. 100% of the load to be served
Explanation
Branch circuit conductors should have an ampacity that is equal to or greater than the load to be served. In this case, the load has increased by 125%, so the branch circuit conductors should have an ampacity of 100% of the load to be served. This ensures that the conductors can safely carry the increased load without overheating or causing any electrical hazards.

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• 36.

### A switch when intended for isolating an electric circuit from the source of power that has no interrupting rating, and it is intended to be operated only after the circuit has been opened by some other means is a/an ___________.

• A.

Isolating Switch

• B.

Bypass Isolation Switch

• C.

General Use Switch

• D.

Transfer Switch

A. Isolating Switch
Explanation
An isolating switch is designed to disconnect an electric circuit from the power source. It does not have an interrupting rating, meaning it is not intended to interrupt the flow of current. Instead, it is meant to be operated only after the circuit has already been opened by another means, such as a circuit breaker. This ensures that the circuit is fully disconnected before the isolating switch is used. Therefore, the correct answer is Isolating Switch.

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• 37.

### Raceways or cable trays containing electric conductors shall not contain ___________. I. Pipe for steam II. Tube for air III. Pipe for water

• A.

I only

• B.

II only

• C.

III only

• D.

I, II, & III

D. I, II, & III
Explanation
Raceways or cable trays containing electric conductors should not contain any pipes or tubes for steam, air, or water. This is because having these pipes or tubes within the raceways or cable trays can lead to potential hazards such as heat transfer, condensation, or leakage, which can damage the electric conductors and pose a risk of electrical shock or fire. Therefore, all options I, II, and III are correct.

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• 38.

### Not readily accesible to persons unless special means for access are used is ___________.

• A.

Elevated

• B.

Guarded

• C.

Isolated

• D.

Listed

C. Isolated
Explanation
The term "not readily accessible to persons unless special means for access are used" indicates that something is separated or secluded from easy reach. "Isolated" fits this description as it means being alone or separated from others.

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• 39.

### After cutting conduit, to remove the rough edges on both ends, the conduit ends should be

• A.

Sanded

• B.

Shaped

• C.

Burnished

• D.

Ground

C. Burnished
Explanation
To remove the rough edges on both ends of the conduit after cutting, the conduit ends should be burnished. Burnishing is a process of smoothing and polishing a surface by applying pressure and friction. This technique helps to create a smooth and even finish on the conduit ends, ensuring that there are no sharp or jagged edges that could cause injury or damage to the wires or cables that will be inserted into the conduit.

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• 40.

### The instrument used to indicate phase relation between current and voltage is the __________.

• A.

Megger

• B.

Power Factor Meter

• C.

Voltmeter

• D.

Galvanometer

B. Power Factor Meter
Explanation
A power factor meter is used to indicate the phase relation between current and voltage. It measures the power factor, which is the ratio of real power to apparent power in an electrical circuit. By measuring the power factor, the meter can determine whether the current and voltage are in phase (leading or lagging) or out of phase. This information is crucial in assessing the efficiency and performance of electrical systems, as well as identifying any power factor correction measures that may be required. A power factor meter is specifically designed for this purpose, making it the correct instrument for indicating phase relation between current and voltage.

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• 41.

### To calculate the VA, one needs to know the __________.

• A.

Voltage and current

• B.

Impedance and conductance

• C.

Resistance and impedance

• D.

Ohms and resistance

A. Voltage and current
Explanation
To calculate the VA (volt-ampere), which is a unit used to measure apparent power in an electrical circuit, one needs to know the voltage and current. The VA is calculated by multiplying the voltage and current together. This is because the apparent power is the product of the voltage and current in an AC circuit, taking into account the phase difference between them. Therefore, knowing the voltage and current values is essential for accurately calculating the VA.

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• 42.

### You have an adjustable trip coil rated at 5 amps on a 200-amp switch. If you want to switch to trip at 120amps, the trip coil should be set at __________.

• A.

2 amps

• B.

3 amps

• C.

4 amps

• D.

5 amps

B. 3 amps
Explanation
The adjustable trip coil is rated at 5 amps, but the switch needs to trip at 120 amps. To achieve this, the trip coil should be set at 3 amps. This means that when the current reaches 3 amps, the trip coil will activate and cause the switch to trip, effectively protecting the circuit from excessive current flow.

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• 43.

### When an ammeter is disconnected from an in-service current transformer, the secondary terminals of the current transformer must be _____________.

• A.

Shorted

• B.

Open

• C.

Option 3

• D.

Option 4

A. Shorted
Explanation
When an ammeter is disconnected from an in-service current transformer, the secondary terminals of the current transformer must be shorted. This is because the current transformer is designed to step down the current flowing through the primary circuit and provide a proportional current in the secondary circuit. When the ammeter is disconnected, it creates an open circuit in the secondary circuit, which can lead to a dangerous voltage build-up. By shorting the secondary terminals, any residual current or induced voltage can safely flow through the short circuit, preventing any potential hazards.

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• 44.

### Reactance will cause the current in a circuit to vary only when ____________.

• A.

AC Current flows

• B.

DC Current flows

• C.

There is non resistance in the circuit

• D.

There is a resistance in the circuit

A. AC Current flows
Explanation
Reactance is a property of an electrical circuit that resists the flow of alternating current (AC). Unlike resistance, which affects both AC and direct current (DC), reactance only comes into play when AC current flows. Reactance is caused by the presence of inductance or capacitance in the circuit, which can cause the current to vary in response to changes in voltage. Therefore, the correct answer is that reactance will cause the current in a circuit to vary only when AC current flows.

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• 45.

### Motors 1/3, 1/4, and 1/8 hp are connected parallel. Those motors deliver a total of ___________.

• A.

1 hp

• B.

7/8 hp

• C.

17/24 hp

• D.

0.07 hp

C. 17/24 hp
Explanation
When motors are connected in parallel, their power outputs are added together. In this case, the motors have power ratings of 1/3, 1/4, and 1/8 hp. Adding these fractions together, we get a total power output of 17/24 hp.

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• 46.

### Flexible cords and cables shall not be used

• A.

For wiring of cranes and hoists

• B.

For prevention of the transmission of noise or vibration

• C.

To run through holes in floors

• D.

Simply to facilitate frequent interchange

C. To run through holes in floors
Explanation
Flexible cords and cables should not be used to run through holes in floors. This is because flexible cords and cables are not designed to withstand the wear and tear that can occur when they are run through holes in floors. The constant movement and rubbing against the edges of the hole can cause damage to the cords and cables, increasing the risk of electrical hazards such as short circuits or exposed wires. Therefore, it is important to use appropriate wiring methods and materials that are specifically designed for running through holes in floors to ensure safety and prevent potential accidents.

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• 47.

### A fixture that weighs more than ______ shall be supported independently of the outlet box.

• A.

25 pounds

• B.

30 pounds

• C.

50 pounds

• D.

75 pounds

C. 50 pounds
Explanation
A fixture that weighs more than 50 pounds should be supported independently of the outlet box. This means that the fixture should not rely solely on the outlet box for support, as it may not be able to bear the weight of the fixture. The additional support ensures the safety and stability of the fixture, preventing any potential accidents or damage.

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• 48.

### The force which moves electrons from atom to atom through a closed conducting path is called ___________.

• A.

Flux

• B.

Resistance

• C.

• D.

EMF

D. EMF
Explanation
EMF stands for electromotive force, which is the force that moves electrons from atom to atom through a closed conducting path. It is responsible for the flow of electric current in a circuit. EMF can be generated by a battery or a power source and is measured in volts.

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• 49.

### An advantage of a 240-volt system compared with a 120-volt system of the same wattage is ________________.

• A.

Reduced voltage drop

• B.

Reduced power used

• C.

Large currents

• D.

Option 4

A. Reduced voltage drop
Explanation
The advantage of a 240-volt system compared with a 120-volt system of the same wattage is reduced voltage drop. This means that the electrical current experiences less loss of voltage as it travels through the system, resulting in more efficient and reliable power transmission. With reduced voltage drop, the electrical devices connected to the system can operate at their intended voltage, ensuring optimal performance and minimizing the risk of damage or malfunction.

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• 50.

### A resistor has an indicated tolerance error of 10%. With a value of 1000 ohms, the minimum resistance the resistor may have is _________.

• A.

1,100 ohms

• B.

990 ohms

• C.

910 ohms

• D.

900 ohms

D. 900 ohms
Explanation
The indicated tolerance error of 10% means that the actual resistance of the resistor can vary by 10% from the indicated value. Since the indicated value is 1000 ohms, the minimum resistance the resistor may have is 1000 ohms - (10% of 1000 ohms) = 1000 ohms - 100 ohms = 900 ohms.

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• Current Version
• Aug 15, 2023
Quiz Edited by
ProProfs Editorial Team
• May 19, 2019
Quiz Created by
Miguel Taleon

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