Daddys Quiz Part 4

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| By Coolcat2254
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Quizzes Created: 3 | Total Attempts: 584
Questions: 50 | Attempts: 150

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Daddys Quiz Part 4 - Quiz

Quiz part 4 of Dads quiz. [This Quiz is property of Martensen Redseal ; & is not permitted for copy or distrubution anywhere within Canada or the US. ]


Questions and Answers
  • 1. 

    Before using a potential tester

    • A.

      Test it with an ohm meter

    • B.

      Test it with equipment supplied in the case

    • C.

      Not bother testing it

    • D.

      Test it once a week.

    Correct Answer
    B. Test it with equipment supplied in the case
    Explanation
    The correct answer is to test the potential tester with the equipment supplied in the case. This is important because the equipment provided in the case is specifically designed to test the potential tester and ensure its accuracy and functionality. By using the supplied equipment, one can verify that the potential tester is working properly and can be relied upon for accurate measurements.

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  • 2. 

    Is the following statement true or false?When re energizing a capacitor bank, the correct sequence to use is to Wait 5 minutes ; Set auto/manual switch to manual ; Set close/trip switch to trip ; close cut outs ; set close/trip switch to close.

    • A.

      True

    • B.

      False

    • C.

      Not Sure

    • D.

      Unknown.

    Correct Answer
    A. True
    Explanation
    The correct sequence for re energizing a capacitor bank is to wait 5 minutes, set the auto/manual switch to manual, set the close/trip switch to trip, close the cut outs, and then set the close/trip switch to close.

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  • 3. 

    Three types of materials used for making rope are :

    • A.

      Nylon, poly, hemp

    • B.

      Hemp, leather, wool

    • C.

      Wool, steel, leather

    • D.

      Cotton, nylon, wool

    Correct Answer
    A. Nylon, poly, hemp
    Explanation
    The correct answer is nylon, poly, hemp. These three materials are commonly used for making ropes. Nylon is a synthetic material known for its strength and durability. Poly is short for polypropylene, another synthetic material that is lightweight and resistant to water and chemicals. Hemp is a natural fiber that has been used for centuries in rope-making due to its strength and flexibility.

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  • 4. 

    If grounds to truck and ground rods are not sufficient

    • A.

      Transfer to better location

    • B.

      Add more ground rods

    • C.

      Return truck to store

    • D.

      Extend ground cable

    Correct Answer
    B. Add more ground rods
    Explanation
    If the grounds to the truck and ground rods are not sufficient, adding more ground rods can help improve the grounding system. Ground rods are used to provide a low-resistance path for electrical currents to flow into the ground, ensuring safety and proper functioning of electrical systems. By adding more ground rods, the grounding system can be enhanced, allowing for better dissipation of electrical energy and reducing the risk of electrical hazards.

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  • 5. 

    Outriggers used on soft soil should have __________ under them

    • A.

      Rocks

    • B.

      Outrigger pads

    • C.

      Thin ply wood

    • D.

      Cross arm

    Correct Answer
    B. Outrigger pads
    Explanation
    Outriggers used on soft soil should have outrigger pads under them. Outrigger pads are large, flat surfaces that are placed under the outriggers of heavy equipment to distribute the weight and prevent sinking into the soft soil. These pads provide stability and support, ensuring that the equipment remains balanced and secure during operation. Using rocks, thin plywood, or a cross arm would not provide the same level of support and could potentially lead to instability or sinking of the equipment.

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  • 6. 

    What often causes the vibration of a tower?

    • A.

      Unstable structure

    • B.

      Uneven ground

    • C.

      Loose guy

    • D.

      Harmonic vibration

    Correct Answer
    D. Harmonic vibration
    Explanation
    Harmonic vibration is the correct answer because it refers to the phenomenon where a structure, such as a tower, starts vibrating at its natural frequency. This can occur when external forces, such as wind or earthquakes, match the natural frequency of the structure, causing it to resonate and vibrate. Unlike the other options, which may also contribute to vibrations, harmonic vibration specifically describes the resonance of the tower due to its natural frequency being excited.

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  • 7. 

    Is the following procedure correct for tamping a pole?fill a little then tamp, fill a little then tamp until full and stocked.

    • A.

      Correct

    • B.

      Incorrect

    • C.

      Not Sure

    • D.

      Unknown

    Correct Answer
    A. Correct
    Explanation
    The procedure described is correct for tamping a pole. By filling a little bit and then tamping, it ensures that the soil is compacted properly around the pole. This method allows for better stability and support for the pole, reducing the risk of it becoming loose or unstable over time.

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  • 8. 

    What device is the simpliest form of machinery

    • A.

      Pulley

    • B.

      Lever

    • C.

      Screw

    • D.

      Wheel and axel

    Correct Answer
    B. Lever
    Explanation
    A lever is considered the simplest form of machinery because it consists of a rigid bar or beam that pivots on a fixed point called a fulcrum. It requires only two components and can be used to amplify or change the direction of a force. Other devices like pulleys, screws, and wheel and axels have more complex mechanisms and require additional parts to function properly. Therefore, a lever is the most basic and straightforward form of machinery.

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  • 9. 

    Two common tools in a line work that employs this device

    • A.

      Pilier and bolt cutter

    • B.

      Lineman wrench and rachet wrench

    • C.

      Automatic wrench and box wrench

    • D.

      Screw driver and skinning knife

    Correct Answer
    A. Pilier and bolt cutter
    Explanation
    The correct answer is pilier and bolt cutter. These two tools are commonly used in line work. A pilier is a type of pliers that is used for gripping and bending wires, while a bolt cutter is used for cutting bolts and other heavy-duty materials. Both tools are essential in line work as they help with various tasks such as securing and cutting wires, making them the correct answer for this question.

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  • 10. 

    What live line stick is used to connect a rope to an energized primary

    • A.

      Link stick

    • B.

      Tie stick

    • C.

      Wire tong

    • D.

      Shot gun stick

    Correct Answer
    A. Link stick
    Explanation
    A link stick is used to connect a rope to an energized primary line. It is a tool specifically designed for this purpose, allowing linemen to safely handle and manipulate the rope while working on live electrical lines. The link stick provides insulation and protection, reducing the risk of electric shock or injury.

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  • 11. 

    SCADA stands for : Supervisory Control and Data Acquisition

    • A.

      True

    • B.

      False

    • C.

      Not Sure

    • D.

      Unknown

    Correct Answer
    A. True
    Explanation
    SCADA stands for Supervisory Control and Data Acquisition, which is a system used to monitor and control industrial processes. It allows operators to remotely control and monitor various devices and collect data from them. Therefore, the statement "SCADA stands for Supervisory Control and Data Acquisition" is true.

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  • 12. 

    Pilaster protects the cables at the base of the pole, provides transition change fro UGD to Overhead

    • A.

      True

    • B.

      False

    • C.

      Not Sure

    • D.

      Unknown

    Correct Answer
    A. True
    Explanation
    Pilasters are structural elements that provide support and protection to cables at the base of a pole. They also serve as a transition point between underground distribution systems (UGD) and overhead systems. This means that pilasters play a crucial role in ensuring the safety and functionality of the cables and the overall distribution system. Therefore, the statement "Pilaster protects the cables at the base of the pole, provides transition change from UGD to Overhead" is true.

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  • 13. 

    Describe how transformer gin poles are attatched to the pole

    • A.

      By a chain hoist wrapped around the gin pole

    • B.

      By a wheel tightener and 36' chain

    • C.

      By a rope

    • D.

      By a 36' sling strap and a rachet tightener

    Correct Answer
    B. By a wheel tightener and 36' chain
    Explanation
    Transformer gin poles are attached to the pole by a wheel tightener and a 36' chain. The wheel tightener is used to secure the gin pole in place while the chain provides additional support and stability. This method ensures that the gin pole is firmly attached to the pole, allowing for safe and efficient lifting and positioning of transformers. The combination of the wheel tightener and the chain helps to distribute the weight evenly and prevent any slippage or movement during the lifting process.

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  • 14. 

    What is the minimum clearance over railways

    • A.

      40 feet with span guys

    • B.

      25 feet with span guys

    • C.

      30 feet with span guys

    • D.

      35 feet with span guys

    Correct Answer
    B. 25 feet with span guys
    Explanation
    The minimum clearance over railways is 25 feet with span guys. This means that any structure or object passing over the railway tracks must have a minimum vertical distance of 25 feet from the tracks, and it should be supported by span guys for stability. This clearance is necessary to ensure the safety of trains passing underneath and to prevent any potential collisions or accidents.

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  • 15. 

    What is the typical output voltage of a potential transformer

    • A.

      600 V

    • B.

      208 V

    • C.

      240 V

    • D.

      120 V

    Correct Answer
    D. 120 V
    Explanation
    A potential transformer is a type of instrument transformer used to step down high voltage levels to a lower, more manageable level for measurement or protection purposes. The typical output voltage of a potential transformer is 120 V. This voltage is commonly used in electrical systems for various applications such as metering, relaying, and control.

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  • 16. 

    Why is running the voltage regulator to neutral necessary

    • A.

      To prevent arching when opening cutout switch

    • B.

      To protect voltage regulator from overloading

    • C.

      A short circuit will develop creating a dangerous situation

    • D.

      As per manufacturer guide

    Correct Answer
    C. A short circuit will develop creating a dangerous situation
    Explanation
    Running the voltage regulator to neutral is necessary to prevent arching when opening the cutout switch. If the voltage regulator is not properly grounded to neutral, there is a risk of a short circuit occurring when the cutout switch is opened. This can create a dangerous situation, as a short circuit can cause electrical fires, damage to equipment, and pose a safety risk to individuals in the vicinity. Therefore, running the voltage regulator to neutral is necessary to ensure the safe operation of the electrical system.

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  • 17. 

    Using a bypass switch, can a voltage regulator be put in and taken out without power interruption?

    • A.

      Correct

    • B.

      Incorrect

    Correct Answer
    A. Correct
    Explanation
    Yes, using a bypass switch, a voltage regulator can be put in and taken out without power interruption. A bypass switch allows for the seamless transition between the voltage regulator and the direct power source. When the voltage regulator is switched off, the bypass switch connects the load directly to the power source, ensuring uninterrupted power supply. Similarly, when the voltage regulator is switched on, the bypass switch disconnects the load from the power source and connects it to the voltage regulator, again without any interruption in power.

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  • 18. 

    What is the KVA rating of a transformer with a full load current of 208 amps at 240 volts?

    • A.

      35.5

    • B.

      49.9

    • C.

      39.9

    • D.

      45.5

    Correct Answer
    B. 49.9
    Explanation
    The KVA rating of a transformer is calculated by multiplying the voltage and current values in KVA. In this case, the full load current is given as 208 amps and the voltage is 240 volts. Multiplying these values gives 49,920 VA, which is equal to 49.9 KVA.

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  • 19. 

    What is percentage of overload, are transformers fused at

    • A.

      200%

    • B.

      150%

    • C.

      100%

    • D.

      50%

    Correct Answer
    B. 150%
    Explanation
    Transformers are typically fused at 150% of their rated load capacity. This means that the fuses will blow if the transformer is subjected to a load that exceeds 150% of its rated capacity. Fusing the transformer at 150% provides a safety margin to protect against potential overloads and prevent damage to the transformer.

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  • 20. 

    What determines if the voltage regulator can be pole mounted or not

    • A.

      Weight of the voltage regulator

    • B.

      Size of the voltage regulator

    • C.

      Size of the pole

    • D.

      Manufacturer of the voltage regulator

    Correct Answer
    A. Weight of the voltage regulator
    Explanation
    The weight of the voltage regulator determines if it can be pole mounted or not. The pole needs to be able to support the weight of the regulator, so if the regulator is too heavy, it may not be suitable for pole mounting.

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  • 21. 

    What is the function of auto tap changer in a voltage regulator

    • A.

      Internal automatic surge protector of the voltage regulator

    • B.

      To lower or raise input voltage to level regulator is set for

    • C.

      To lower or raise output voltage to level regulator is set for

    • D.

      Internal thermostat control of the voltage regulator

    Correct Answer
    C. To lower or raise output voltage to level regulator is set for
    Explanation
    The function of an auto tap changer in a voltage regulator is to lower or raise the output voltage to the level that the regulator is set for. This means that the auto tap changer adjusts the voltage output of the regulator based on the desired level set by the user. It ensures that the output voltage remains stable and within the specified range, even if there are fluctuations or variations in the input voltage.

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  • 22. 

    What fuse size is required for a 25KVA 14,400 volt transformer

    • A.

      4.6 amps = 5 amp fuse

    • B.

      2.6 amps = 3 amp fuse

    • C.

      3.6 amps = 4 amp fuse

    • D.

      5.6 amps = 6 amp fuse

    Correct Answer
    B. 2.6 amps = 3 amp fuse
    Explanation
    The correct answer is 2.6 amps = 3 amp fuse. The size of the fuse required for a transformer is determined by the maximum current that the transformer can draw. In this case, the transformer has a maximum current of 2.6 amps, so a 3 amp fuse is needed to protect the transformer from overcurrent.

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  • 23. 

    What is the purpose of putting a shaunt capacitor on a line

    • A.

      To dampen ferroresonance

    • B.

      To increase line current

    • C.

      To correct power factor

    • D.

      To eliminate the 9th harmonic

    Correct Answer
    C. To correct power factor
    Explanation
    A shunt capacitor is placed on a line to correct power factor. Power factor is a measure of how efficiently electrical power is being used. When the power factor is low, it means that the electrical system is not utilizing the available power effectively. By adding a shunt capacitor, the power factor can be improved by reducing the reactive power and increasing the overall power factor of the system. This helps in maximizing the efficiency of the electrical system and reducing energy losses.

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  • 24. 

    What is the voltage and class of orange blankets

    • A.

      20 kv, type 1 class 2

    • B.

      They have no rating

    • C.

      30 kv, type II class 3

    • D.

      40 kv type II class 4

    Correct Answer
    D. 40 kv type II class 4
    Explanation
    The correct answer is 40 kv type II class 4. This answer indicates that the voltage of orange blankets is 40 kv and they belong to type II class 4.

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  • 25. 

    What is meant by backfeed on a transformer

    • A.

      Energizing secondary winding w/o energizing primary winding

    • B.

      Energizing primary winding thus energizing both primary and secondary winding

    • C.

      Energizing neutral thus energizing both primary and seconday winding

    • D.

      Energizing secondary winding thus energizing primary winding.

    Correct Answer
    D. Energizing secondary winding thus energizing primary winding.
    Explanation
    Backfeed on a transformer refers to the process of energizing the secondary winding, which in turn energizes the primary winding. This means that the power flows from the secondary winding back into the primary winding, creating a loop of energy transfer. This can occur when there is a fault or a reverse power flow in the system, causing the secondary winding to supply power to the primary winding.

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  • 26. 

    What material is the core of a transformer made from

    • A.

      Copper

    • B.

      Stainless steel

    • C.

      Laminated steel

    • D.

      Aluminum

    Correct Answer
    C. Laminated steel
    Explanation
    The core of a transformer is made from laminated steel. Laminated steel is used because it has low magnetic losses and high magnetic permeability, which allows for efficient transfer of energy between the primary and secondary coils of the transformer. The laminated structure helps to reduce eddy currents, which can cause energy losses and overheating. Copper is commonly used for the windings of the transformer, while stainless steel and aluminum are not typically used for the core material.

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  • 27. 

    What do the markings H1 and H2 on a transformer stand for

    • A.

      Secondary bushing identification

    • B.

      Design only

    • C.

      Transformer KVR classification

    • D.

      Primary bushing identification

    Correct Answer
    D. Primary bushing identification
    Explanation
    The markings H1 and H2 on a transformer stand for primary bushing identification. These markings are used to identify the primary side of the transformer, which is connected to the power source. The primary bushings are typically labeled as H1 and H2 to indicate the correct connection for the primary winding of the transformer. This helps ensure that the transformer is properly installed and connected to the power supply.

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  • 28. 

    When is it necessary to check polarity

    • A.

      When parrarelling two transformers / making a 3 phase connection

    • B.

      When installing a transformer / making a single phase connection

    • C.

      When removing a transformer from service

    • D.

      When testing a transformer for single phase connection

    Correct Answer
    A. When parrarelling two transformers / making a 3 phase connection
    Explanation
    When paralleling two transformers or making a 3 phase connection, it is necessary to check polarity. This is because the polarity of the transformers must be aligned in order to ensure proper phase relationship and avoid any phase shift or imbalance in the system. Checking the polarity involves verifying that the primary and secondary windings of the transformers are connected correctly, with the corresponding terminals properly matched. By doing so, the transformers can work together effectively and contribute to a balanced and synchronized 3 phase connection.

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  • 29. 

    What is the procedure for finding the mechanical advantage of rope blocks

    • A.

      Count numbers of blocks

    • B.

      Measure size of block

    • C.

      Measure size of rope

    • D.

      Count numbers of ropes

    Correct Answer
    D. Count numbers of ropes
    Explanation
    To find the mechanical advantage of rope blocks, one needs to count the number of ropes. The mechanical advantage is determined by the number of ropes supporting the load. The more ropes there are, the greater the mechanical advantage, as each rope shares the load, reducing the force required to lift it. Therefore, counting the number of ropes is essential in determining the mechanical advantage of rope blocks.

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  • 30. 

    What must be done before changing taps in a transformer

    • A.

      Remove risers

    • B.

      De energize

    • C.

      Wait 5 minutes then short terminals

    • D.

      Re energize

    Correct Answer
    B. De energize
    Explanation
    Before changing taps in a transformer, it is necessary to de-energize the transformer. This means disconnecting the power supply and ensuring that there is no electrical current flowing through the transformer. This is done to prevent any potential accidents or damage to the equipment during the tap changing process. Once the transformer is de-energized, it is safe to proceed with changing the taps. The other steps mentioned in the question, such as removing risers, waiting for 5 minutes, and shorting terminals, may be specific instructions for a particular transformer model or situation, but the essential step that must be done before tap changing is de-energizing the transformer.

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  • 31. 

    What is the most common increment for distribution transformers standard tap settings

    • A.

      3 1/2%

    • B.

      1 1/2%

    • C.

      2 1/2%

    • D.

      4 1/2 %

    Correct Answer
    C. 2 1/2%
    Explanation
    The most common increment for distribution transformers standard tap settings is 2 1/2%. This means that the tap settings on distribution transformers are typically adjusted in increments of 2 1/2% to accommodate variations in voltage levels.

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  • 32. 

    After disconnecting capacitors from a 4160 volt line, but before working on them the terminals must be short circuited to remove the residual charge,how long a period after disconnection must be allowed before short circuiting

    • A.

      Three minutes

    • B.

      Five minutes

    • C.

      Fifteen minutes

    • D.

      They must be short circuited immediately

    Correct Answer
    B. Five minutes
    Explanation
    After disconnecting capacitors from a 4160 volt line, there is still residual charge present in the terminals. To ensure safety before working on them, the terminals must be short circuited to remove this charge. The correct answer of five minutes suggests that a period of five minutes should be allowed after disconnection before short circuiting. This allows enough time for the residual charge to dissipate, reducing the risk of electrical shock or injury when short circuiting the terminals.

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  • 33. 

    After clearance has been received that a circuit is de energized what additional precaution should be taken first before work is started

    • A.

      Apply rubber protective equipments

    • B.

      Ground the circuit

    • C.

      Disconnect all grounding conductors

    • D.

      Test for potential

    Correct Answer
    D. Test for potential
    Explanation
    Before starting work on a de-energized circuit, it is important to test for potential to ensure that there is no residual electrical energy present. This is necessary because even after receiving clearance that the circuit is de-energized, there is still a possibility of stored electrical energy that could pose a risk to the workers. Testing for potential helps to verify that the circuit is truly safe to work on and minimizes the risk of electrical accidents or injuries.

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  • 34. 

    An installation of three phase instrument rated metering has a 600 volt PT primary and 200/5 CTs what is the maximum KVA of the installation

    • A.

      150 KVA

    • B.

      360 KVA

    • C.

      300 KVA

    • D.

      207.6 KVA

    Correct Answer
    D. 207.6 KVA
    Explanation
    The maximum KVA of the installation can be calculated by multiplying the primary voltage (600 volts) by the secondary current (5 amps) of the CTs and dividing the result by 1000. Therefore, the calculation would be (600 volts * 5 amps) / 1000 = 3 KVA. However, since this is a three-phase installation, the total KVA would be three times that value, which is 3 KVA * 3 = 9 KVA. Therefore, the correct answer is 9 KVA, not 207.6 KVA.

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  • 35. 

    What do you do if you can't get a neutral indication on a regulator

    • A.

      Close by pass switches

    • B.

      Open the by pass switch

    • C.

      De energize the line

    • D.

      Closs the by pass swith

    Correct Answer
    C. De energize the line
    Explanation
    If you can't get a neutral indication on a regulator, the best course of action would be to de-energize the line. This means cutting off the power supply to the regulator, which can help prevent any potential hazards or further complications. By de-energizing the line, you can ensure the safety of both the regulator and any personnel working with it.

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  • 36. 

    If one fuse blows on a delta bank what happens to the line voltage on that phase

    • A.

      Goes to zero

    • B.

      Drops to 120

    • C.

      Reduces bank capacity

    • D.

      Remains at 240

    Correct Answer
    D. Remains at 240
    Explanation
    If one fuse blows on a delta bank, the line voltage on that phase will remain at 240. In a delta configuration, each phase is independent and has its own fuse. When one fuse blows, it only affects the specific phase associated with that fuse, while the other phases remain unaffected. Therefore, the line voltage on the remaining phases will remain at 240 volts.

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  • 37. 

    What is the standard wiring color coding

    • A.

      Red, yellow, green

    • B.

      Red, yellow, blue

    • C.

      Red, yellow, black

    • D.

      Yellow, black, blue

    Correct Answer
    C. Red, yellow, black
    Explanation
    The standard wiring color coding typically consists of red, yellow, and black wires. These colors are used to indicate specific functions or connections in electrical systems. Red is often used for positive power connections, yellow for switched or control power connections, and black for ground or negative connections. This color coding system helps ensure consistency and ease of identification when working with electrical wiring.

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  • 38. 

    Is the following statement true?\The proper method of putting a capacitor bank back into service is to Remove the grounds ; Install jumpers ; and then put control on manual and close in?

    • A.

      True

    • B.

      False

    • C.

      Unknown

    • D.

      Not sure

    Correct Answer
    A. True
    Explanation
    The correct answer is true. The proper method of putting a capacitor bank back into service is to first remove the grounds, then install jumpers, and finally put the control on manual and close in. This sequence ensures the safe and efficient reactivation of the capacitor bank.

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  • 39. 

    Why are there by-pass switches on regulators

    • A.

      For sectionalizing

    • B.

      In case the regulator can't be put in neutral

    • C.

      To blow them up with

    • D.

      To allow the regulator to be taken out of the system

    Correct Answer
    D. To allow the regulator to be taken out of the system
    Explanation
    The presence of by-pass switches on regulators allows for the regulator to be taken out of the system. This means that when maintenance or repairs are needed, the regulator can be easily disconnected from the system without interrupting the flow of electricity. By having this functionality, the regulator can be efficiently removed and serviced, ensuring that the system continues to operate smoothly.

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  • 40. 

    When a fuse blows how is the arc extinguished

    • A.

      Magnetic coupling

    • B.

      Arc expulsion

    • C.

      Arc damping

    • D.

      Arc squelching

    Correct Answer
    B. Arc expulsion
    Explanation
    When a fuse blows, the arc is extinguished through a process called arc expulsion. This involves the use of a high-pressure gas, such as air or sulfur hexafluoride, to rapidly cool and separate the contacts, thus extinguishing the arc. The gas creates a strong blast that pushes the arc away from the contacts, preventing re-ignition and ensuring the circuit is safely interrupted.

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  • 41. 

    Which side would you measure the depth of a hole if a pole is being set on a slopping ground

    • A.

      Low side

    • B.

      High side

    Correct Answer
    A. Low side
    Explanation
    When setting a pole on a sloping ground, measuring the depth of the hole on the low side is necessary. This is because the pole needs to be securely planted in the ground to ensure stability. By measuring the depth on the low side, it ensures that the pole is properly anchored and prevents any potential leaning or instability caused by the slope.

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  • 42. 

    What connection is it when the neutral ends of a 3 phase generator are connected together

    • A.

      Delta

    • B.

      Wye

    Correct Answer
    B. Wye
    Explanation
    When the neutral ends of a 3 phase generator are connected together, it is known as a wye connection. In a wye connection, the neutral point is connected to the common point of the three windings, forming a star-shaped configuration. This connection allows for a neutral conductor to be present, which is useful for balancing the load and providing a return path for unbalanced currents. It is commonly used in power distribution systems to provide a neutral reference point and to facilitate the connection of single-phase loads.

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  • 43. 

    What is the voltage level when the sine wave crosses the center line

    • A.

      0 volt

    • B.

      20 volt

    • C.

      10 volt

    • D.

      30 volt

    Correct Answer
    A. 0 volt
    Explanation
    When a sine wave crosses the center line, it means that the voltage level is at its zero or neutral point. This is because a sine wave oscillates between positive and negative values, with the center line representing zero voltage. Therefore, the correct answer is 0 volt.

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  • 44. 

    What electrical principal is used to make a maxi meter work

    • A.

      Electromotive force (EMF)

    • B.

      Electro magnetic induction

    • C.

      Electrostatic force law

    • D.

      Law of magnetic attraction and rpultion

    Correct Answer
    B. Electro magnetic induction
    Explanation
    Electromagnetic induction is the principle used to make a maxi meter work. This principle states that when a conductor is exposed to a changing magnetic field, an electromotive force (EMF) is induced in the conductor. This induced EMF can then be measured to determine the electrical quantity being measured by the meter. Therefore, electromagnetic induction is the key principle used in the functioning of a maxi meter.

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  • 45. 

    WHMIS stands for

    • A.

      Workplace health manual information system

    • B.

      Workplace health material information system

    • C.

      Workplace hazardous material information system

    • D.

      Workplace hazardous manual information system

    Correct Answer
    C. Workplace hazardous material information system
    Explanation
    WHMIS stands for workplace hazardous material information system. This system is designed to provide information about hazardous materials in the workplace. It ensures that workers are aware of the potential hazards associated with the materials they are working with and provides guidelines on how to handle and store them safely. The purpose of WHMIS is to protect the health and safety of workers by providing them with the necessary information to work safely with hazardous materials.

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  • 46. 

    What is the minimum size and type of wire that can be used for pole and transformer grounds

    • A.

      #2 copper/solid, stranded and bare

    • B.

      #4 copper /solid, stranded and bare

    • C.

      #6 copper/ solid, stranded and bare

    • D.

      # copper /solid, stranded and bare

    Correct Answer
    B. #4 copper /solid, stranded and bare
    Explanation
    The minimum size and type of wire that can be used for pole and transformer grounds is #4 copper/solid, stranded, and bare. This wire size and type is suitable for ensuring proper grounding and safety in these applications.

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  • 47. 

    When a conductor is wound into a coil, what happens to the magnetic field?

    • A.

      Nothing

    • B.

      Unstable

    • C.

      Increases in strength

    • D.

      Decreases in strength

    Correct Answer
    C. Increases in strength
    Explanation
    When a conductor is wound into a coil, the magnetic field increases in strength. This is because the coil increases the number of turns of the conductor, which in turn increases the number of magnetic field lines passing through the coil. This results in a stronger magnetic field.

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  • 48. 

    What would be done each time prior to using your rubber gloves

    • A.

      Scraping for un even surface due to cracks and damage

    • B.

      They should be given an airtest to check for holes

    • C.

      Turn inside out to check for corona damage

    • D.

      Apply powder compound on surface to visually check for damage

    Correct Answer
    B. They should be given an airtest to check for holes
    Explanation
    Before using rubber gloves, it is important to perform an air test to check for any holes. This is necessary because if there are any holes in the gloves, they will not provide adequate protection against chemicals or other substances. By conducting an air test, any holes can be identified and the gloves can be replaced if needed.

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  • 49. 

    What value eliminates cylinder drift in the event of supply line or control valve failure

    • A.

      Relief valve

    • B.

      Glove valve

    • C.

      Holding valve

    • D.

      Spool valve

    Correct Answer
    C. Holding valve
    Explanation
    A holding valve is designed to eliminate cylinder drift in the event of supply line or control valve failure. It prevents the flow of hydraulic fluid in one direction, effectively locking the cylinder in place and preventing any movement or drift. This ensures that the cylinder remains stationary even if there is a failure in the supply line or control valve, providing a reliable and secure hold.

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  • 50. 

    What type of non conductive hydraulic hose is commonly used in line equipments

    • A.

      Plastic

    • B.

      Rubber

    • C.

      Syntethic fiber

    • D.

      Carbon fiber

    Correct Answer
    C. Syntethic fiber
    Explanation
    Synthetic fiber is commonly used as a non-conductive hydraulic hose in line equipment. This type of hose is preferred due to its non-conductive properties, which help prevent the flow of electric current through the hose. Synthetic fibers are lightweight, flexible, and resistant to chemicals, making them suitable for hydraulic applications. They offer good durability and can withstand high pressure and temperature conditions. Additionally, synthetic fiber hoses are cost-effective and have a long service life, making them a popular choice in various industries that require non-conductive hydraulic hoses.

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 17, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 10, 2010
    Quiz Created by
    Coolcat2254
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