Engineering Laws and Ethics - MCQs Part IX

Compiled MCQs in Engineering Laws and Ethics Part 9 of the series as one topic in General Engineering and Applied Sciences (GEAS) in the ECE Board Exam.

This is the Multiples Choice Questions Part 9 of the Series in Engineering Laws and Ethics as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Online Questions and Answers in Laws and Ethics Series

Following is the list of multiple choice questions in this brand new series:

Engineering Laws and Ethics MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII
PART 8: MCQs from Number 351 – 400                 Answer key: PART VIII
PART 9: MCQs from Number 401 – 450                 Answer key: PART IX
PART 10: MCQs from Number 451 – 500                 Answer key: PART X

Continue Practice Exam Test Questions Part IX of the Series

401. An electrical discharge which occurs between clouds and also from cloud to earth.

• A. Thunder
• B. Lightning
• C. Corona
• D. Aurora

402. Results from abnormally high sound level, the physical effects of which may vary from minor discomfort to serious injury.

• A. Electrical Shock
• B. Super Sonic
• C. Acoustic Shock
• D. Sonic Boom

403. The factor that determines the intensity of electrical shock is

• A. Current
• B. Voltage
• C. Resistance
• D. Conductance

404. The average resistance of a dry adult human body is approximately:

• A. 10,000 ohms
• B. 100,000 ohms
• C. 1,000,000 ohms
• D. 100 ohms

405. Ventricular fibrillation is likely to occur when a 60Hz rms current of _________ amperes and above passes through one’s chest cavity.

• A. 0.010
• B. 0.11
• C. 0.030
• D. 0.33

406. The minimum voltage value that is considered hazardous is:

• A. 45V RMS AC
• B. 12V RMS AC
• C. 24V RMS AC
• D. 50V RMS AC

407. The minimum voltage value that is considered hazardous is:

• A. 150V DC
• B. 45V DC
• C. 135V DC
• D. 160V DC

408. The potential difference at any time between two points on the floor or earth surface separated by a distance of one pace, or about one meter, in the direction of maximum potential gradient shall be no greater than __________.

• A. 45 volts rms AC or 135 volts DC
• B. 25 volts rms AC or 115 volts DC
• C. 15 volts rms AC or 105 volts DC
• D. 55 volts rms AC or 145 volts DC

409. It is the provision of a grounded electrical conducting material located such that foreign potential will be intercepted and surge currents diverted to ground with the least damage to plant equipment possible.

• A. Grounding
• B. Shielding
• C. Bonding
• D. Current Limiting

410. Prevents development of hazardous potential difference in communication plant by direct bonding, when permissible or by use of surge arresters, discharge gaps, diodes, etc. which operate under abnormal voltage condition.

• A. Current limiting
• B. Resistance limiting
• C. Grounding
• D. Voltage limiting

411. The current in a circuit can be kept from rising above predetermined value by the use of a fuse in series with a circuit.

• A. Current limiting
• B. Resistance limiting
• C. Grounding
• D. Voltage limiting

412. This is used to divert undesired currents before they reach the equipment being protected and often are installed both at and some distance away from the protected equipment.

• A. Current limiting
• B. Resistance limiting
• C. Grounding
• D. Voltage limiting

413. It is the resistance path of a ground connection which includes the ground wire and its connection to ground electrode.

• A. Ground Resistance
• B. Grounded Electrode
• C. Ground Path
• D. Resistance Path

414. For equipment locations, antenna towers, and all allied installations, the ground resistance must never exceed __________.

• A. 25 ohms
• B. 3 ohms
• C. 43 ohms
• D. 5 ohms

415. For outside plant telephone poles and manholes as well as customer premises, the ground resistance must never exceed __________.

• A. 25 ohms
• B. 3 ohms
• C. 43 ohms
• D. 5 ohms

416. It is an electrode buried in the ground for the purpose of establishing a low resistance electrical contact with the earth.

• A. Ground pole
• B. Lightning Rods
• C. Guy

417. It is a metal strip or rod, usually of copper or similar conductive material, designed to protect tall or isolated structures (such as the roof of a building or the mast of a vessel) from lightning damage.

• A. Ground pole
• B. Lightning Rods
• C. Guy

418. A device used in electrical systems to protect against excessive current.

• A. fuse
• B. Lightning rod
• C. Surge arrester
• D. Grounding

419. These are normally open circuited devices and pass no significant current at normal operating potentials.

• A. fuse
• B. Lightning rod
• C. Surge arrester
• D. Grounding

420. Provides certain level of safety to humans and property in case of equipment damages.

• A. fuse
• B. Lightning rod
• C. Surge arrester
• D. Bonding or Grounding

421. The simplest way to make an earth resistance test is to use:

• A. Direct Method or two terminal test
• B. Voltmeter-Ammeter Method
• C. Triangulation Method
• D. Three terminal test

422. It is the resistance of parallel faces of a one cubic centimeter of soil expressed in ohm-centimeter.

• A. Ground resistance
• B. Earth resistivity
• C. Cubic resistance
• D. Earth density

423. The following are ways to improve grounds except:

• A. Lengthen the ground-electrode in the earth
• B. Use multiple rods
• C. Treat the soil when 1 & 2 are not feasible
• D. Place stones near the rod

424. Ground resistance shall be tested when installed and periodically afterwards, at least __________ during the dry or non-rainy months and ALL VALUES OBTAINED SHALL BE NO GREATER THAN THE RULE REQUIRED.

• A. 3 times per year
• B. twice a year
• C. once a year
• D. 12 times a year

425. All ground connections, be it solderless or soldered, shall be checked at least __________ to be sure they are tight.

• A. 3 times per year
• B. twice a year
• C. once a year
• D. 12 times a year

426. This loading shall be taken as the resultant stress due to wind and dead weight for 240 kph wind velocity.

427. This loading shall be taken as the resultant stress due to wind and dead weight for 200 kph wind velocity.

428. This loading shall be taken as the result ant stress due to wind and dead weight for 160 kph wind velocity.

429. Batteries should be located where temperatures range between __________ degrees Celsius.

• A. 12.5 and 25.2
• B. 15.5 and 32.2
• C. 15.2 and 52.2
• D. 55.5 and 60.3

430. Lead acid or similar gas emitting battery installations where the aggregate power exceeds __________ 5 kilowatts shall be located in a properly ventilated room separated from the equipment room or location where people are staying.

• A. 5 kW
• B. 10 kW
• C. 1 kW
• D. 15 kW

431. Smoking and storing of inflammable materials is prohibited in battery rooms and “NO SMOKING” signs should be posted ___________.

• A. inside the room only
• B. before entering battery rooms
• C. outside the room only
• D. Both A and C

432. An acid neutralizing agent such as __________ should be stored and available in battery rooms for use in accidental electrolyte or acid spillage.

• A. oil
• B. kerosene
• C. flour
• D. Caustic soda

433. A low resistance electrical connection between two cable sheaths, between two ground connections or between similar parts of two circuits.

• A. Bond
• B. Short
• C. Fuse
• D. Guy

434. The vertical space reserved along the side of a pole or tower to permit ready access for linemen to equipment and conductors located thereon.

• A. Stairway
• B. Climbing Space
• C. Guy
• D. Pole

435. Insulated wires, used to run a subscriber’s line from the terminal on the pole to the protector at the house or building.

• A. main line
• B. main cable
• C. dropline
• D. dropwire

436. a physical condition that causes a device, a component or an element to fail to perform in a required manner.

• A. damaged
• B. hazard
• C. fault
• D. short

437. A current that flows from one conductor to ground or to another conductor owing to any abnormal connection (including an arc) between the two.

• A. Fault current
• B. Dark current
• C. Leakage current

438. An apparatus so treated such that it will not maintain a flame or will not be injured readily when subjected to flame.

• A. Flame Proof
• B. Flame Retarding
• C. Burn Proof
• D. Anti Flame

439. A property of materials or structures such that they will not convey flame or continue to burn for longer times than specified in the appropriate flame test.

• A. Flame Proof
• B. Flame Retarding
• C. Burn Proof
• D. Anti Flame

440. A discharge through air, around or over the surface of solid, liquid or other insulation, between parts of different potential of polarity, produced by the application of voltage such that the breakdown path becomes sufficiently ionized to maintain an electric arc.

• A. Aurora
• B. Corona
• C. Washover
• D. Arc

441. A conducting connection, whether intentional or accidental, by which an electric circuit or equipment is connected to earth, or to some conducting body of relatively large extent that serves in place of the earth.

• A. short
• B. jumper
• C. ground
• D. ink

442. A tension member (of solid or stranded wires) used to withstand an otherwise unbalanced force on a pole or other overhead line structures.

• A. Bond
• B. Short
• C. Fuse
• D. Guy

443. A guy extending from a pole or structure or tree is sometimes called a span guy.

• B. Anchor guy
• C. Bla guy
• D. Guy post

444. An opening in an underground run or system into which workers reach, but do not enter.

• A. Manhole
• B. Rathole
• C. Handhole
• D. Finger hole

445. A device designed to protect apparatus from high transient voltage, by diverting surge current to ground and capable of repeating this function as specified.

• A. Lightning ball
• B. Lightning Arrester
• C. Fuse
• D. Lightning Protector

446. A subsurface chamber, large enough for a person to enter, in the route of one or more conduit runs, and affording facilities for placing and maintaining in the runs, conductors, cables and any associated apparatus.

• A. Manhole
• B. Rathole
• C. Handhole
• D. Finger hole

447. Stranded steel wires in a group which generally is not a part of the conducting system, its primary function being to support wires or cables of the system.

• A. guy
• B. support
• C. conduit
• D. messenger

448. A general term applied to the whole or portion of the physical property of a communication company which contributes to the furnishing of communication service.

• A. zone
• B. area
• C. plant
• D. division

449. A metallic rod, driven into the ground to provide an electrical connection to the earth.

• A. Lightning rod
• B. Ground rod
• C. Drop ground

450. A metallic rod carried above the highest point of a pole or structure and connected to earth by a heavy copper conductor intended to carry lightning currents directly to earth.

• A. Lightning arrester
• B. Lightning rod
• C. Breaker
• D. Lightning gap

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