General ESAS Flashcards
In a computer, ______ is capable to store single binary bit.
flip flop
ASCII stands for
American Standard Code for Information Interchange
It can be used for erasing and reconstructing the contents of ROM
EPROM (Erasable Programmable Read-Only Memory)
It is the representation of the system being designed.
Interpreter
Which memory has the shortest access times?
Cache memory
A set of flip flops integrated together is called _______.
register
When a man on a frictionless rotating stool extends his arms horizontally, his rotational kinetic energy:
must decrease
Find the range x of a gun which fires a shell with muzzle velocity v at an angle of elevation θ.
x = (v²sin2θ)/g
A register organized to allow to move left or right operations is called a ______.
shift register
What does DMA stand for?
Direct Memory Access
A ________ converts the whole of a higher level program code into machine code in one step.
compiler
The BIOS is the abbreviation of _______.
Basic Input Output System
A disk starts from rest and rotates about a fixed axis, subject to a constant net torque. The work done by the torque during the second revolution is ______ as the work done during the first revolution.
the same
When a key is pressed on the keyboard, which standard is used for converting the keystroke into the corresponding bits?
ANSI
What do you call the programs that are used to find out possible faults and their causes?
Diagnostic software
What do you call the translator which takes assembly language program as input and produce machine language code as output?
Assembler
A man, with his arms at his sides, is spinning on a light frictionless turntable. When he extends his arms his rotational momentum ____________
remains the same
Which device can understand difference between data and programs?
Microprocessor
Which of the following memories need refresh?
DRAM
The noble gas which is present in microscopic quantities in air is
xenon
The imaginary line tangent to which at any point indicates the direction of motion at that point is called ______.
stream line
Ozone occurs in the upper layers of air in the atmosphere because
ultra-violet light is present only in the upper layers
Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the
Law of Definite Proportions
Which one of the following gases is extremely soluble in water?
Ammonia
This substance deforms continuously under the application of a shear force. It cannot sustain a shear force at rest.
Fluid
The freezing point of water at 760 mm pressure is
273 K
The volume of fluid that flows through a section of a channel or pipe per unit time, in m³/s is called ______.
discharge
A centrifugal pump in which the driving unit is supported by the pump having its suction and discharge flanges approximately at the center.
In-line pump
The volumetric change of the fluid caused by a resistance is known as ______.
adhesion
The atomic number of an element represents:
the number of protons in the nucleus
The flow of fluid or stream which may be represented by a curve is _______.
two-dimensional flow
The instantaneous positions of all fluid particles that pass through a given point is ______.
streak line
The equation which states that the total energy in the steady flow of a frictionless and incompressible fluid is constant is the _______.
Bernoulli`s equation
The property of a fluid with its molecules attracted to each other is called _____.
Cohesion
The function of nitrogen in air is
to make air a moderate supporter of combustion
A water that is available from a well, driven into water-bearing subsurface strata is ______.
ground water
In the common soda-acid fire extinguisher, the fire is put out by
carbon dioxide
The most abundant noble gas present in air is
argon
The flow in which the quantity of fluid per unit time is not constant is called ______.
unsteady flow
“Pressure set up in a confined liquid acts equally in all directions, and always at right angle to the containing surfaces” is known as ______.
Pascal`s law
The flow in which the quantity of fluid per unit time is constant is called ______.
steady flow
What is ‘oxygen mixture’?
A mixture of potassium chlorate and manganese dioxide
What is the radius of a solid round conductor, which is the nearest equivalent of a stranded conductor whose total area is exactly 8.0 mm²?
3.191 mm
What is the maximum rating of a molded case circuit breaker to protect a 10 hp squirrel cage induction motor rated at 230 volts, 3-phase, 60 Hz with a full load rating of 28 A?
70 A
Instrument pilot lights and potential transformers shall be protected by OCD of ______ amps or less.
15
Overhead spans of open conductors and open multiconductor cables not over 600 volts shall have a vertical clearance of not less than ______ above the roof surface.
2500
The Philippine Electrical Code, Part 1 does not cover wiring of equipment installed within or to or from one of the following. Which one is this?
Airplanes
Live parts of generators operated at more than ____volts to ground shall not be exposed to accidental contact where accessible to unqualified persons.
50
In a battery room, it is important that no hot spot due to loose connections or sparking will occur, due to a serious event may happen. What can this be?
An explosion might follow
For swimming pool water heaters rated at more than ____amperes that have specific instructions regarding bonding and grounding, only those parts designated to be bonded shall be bonded, and only those parts designated to be grounded shall be grounded.
50
The primary winding of a step down transformer shall be protected on the primary side by overcurrent device rated NOT more than a certain percentage of the primary current. What is this percentage?
125%
The adjustable speed drive incoming branch circuit or ______ to power conversion equipment included as a part of an adjustable speed drive system shall be based on the rated input to the power conversion equipment.
feeder
A means shall be provided in each metal box over 100 cubic inches for the connection of an equipment grounding conductor. The means shall be permitted to be ______.
I. a tapped hole
II. the cover screw
III. a screw used to mount the box
I only
If a switch or circuit breaker serves as the disconnecting means for a permanently connected motor driven appliance of more than _____horsepower, it shall be located within sight from the motor controller.
1/8
Torque motors are rated for operation ______.
at standstill
Listed or labeled equipment shall be installed, used, or both, in accordance with ______.
the instructions included in the listing or labeling
Busways shall not be installed in the following EXCEPT ______.
where they are located in the open and visible
For the installations of 2.0 mm² conductors in 600-volts circuits. What is the minimum insulation resistance allowed by the Philippine Electrical code?
500,000 ohms
A grounding electrode connection that is encased in concrete or directly buried shall ______.
not be required to be accessible
Any motor application shall be considered as ____ unless the nature of the apparatus it drives is such that the motor will not operate continuously with load any condition of use.
continuous duty
The lead wires of heating cables are color coded for ____identification.
voltage
Insulators used to support wires under cross arm are called ______.
suspension
Open conductors passing over residential driveways and those commercial areas not subject to truck traffic where the voltage exceeds 300 V to ground shall have vertical clearance of ______.
4,600 mm
Where single conductors #1/0 through 4/0 are installed in a ladder or ventilated trough cable tray they shall be installed in no more than ______.
I. a depth of 4”
II. a depth of 6”
III. a single layer
III only
III. a single layer
When alternating current flows through a conductor, there is an inductive action that causes the current in the conductor to be forced toward the outer surface. The current is greater at the surface that at the center of the conductor, this, _______ will cause the resistance in the conductor to increase due to the increased heating of the conductor.
skin effect
In starting a large DC motor, a starter is primarily used in order to _____.
limit the starting current
A device actuated by the operation of some devices with which it is directly associated, to govern succeeding operations of some or allied devices.
Relay
The number of degrees of freedom of a triatomic molecule is:
9
To help keep buildings cool in the summer, dark colored window shades have been replaced by light colored shades. This is because light colored shades:
reflect more sunlight
Which of the following does NOT produce vacancies, interstitial defects, or impurity defects in a material?
Slow equilibrium cooling
Inside a room at a uniform comfortable temperature, metallic objects generally feel cooler to the touch than wooden objects do. This is because:
metal conducts energy better than wood
In an ideal gas mixture of constituents i and j, what is the mole fraction of component i, x_i, equal to? Underscore in refers to subscript
p_i/(p_i + p_j)
There is a temperature at which the reading on the Kelvin scale is numerically:
equal to that on the Fahrenheit scale
How is the quality, x, of a liquid-vapor mixture defined?
The fraction of the total mass that is saturated vapor.
As the amount of slip increases, additional deformation becomes more difficult and decreases until the plastic flow finally stops. Slip may begin again only if a larger stress is applied. What is this phenomenon known as?
Strain hardening
An engine that in each cycle does positive work and rejects thermal energy, with no thermal energy input, would violate:
the first law of thermodynamics
The general energy equation for an open system involves the following five terms:
I. Accumulation of energy
II. Net energy transfer by work (standard sign convention)
III. Net energy transfer by heat (standard sign convention)
IV. Transfer of energy in by mass flow
V. Transfer of energy out by mass flow
Using the standard sign conventions, what is the proper arrangement of these terms for the general energy equation satisfying the first law of thermodynamics?
I = - II + III + IV – V
The compressibility factor, Z, is used for predicting the behavior of nonideal gases. How is the compressibility factor defined relative to an ideal gas? Subscript “c” refers to critical value.
Z = pV/RT
When two gases separated by a thermally conducting wall are in thermal equilibrium with each other:
only their temperatures must be the same
Which of the following sets of reversible processes describes an ideal Otto cycle?
I. Adiabatic compression, constant volume heat addition, adiabatic expansion, constant volume heat rejection
II. Isothermal compression, isobaric heat addition, isothermal expansion, isobaric heat rejection
I only
The change in entropy is zero for:
reversible adiabatic processes
What is the temperature difference of the cycle if the entropy difference is ∆S and the work done is W?
W/∆S
The first law of thermodynamics is based on which of the following principles?
Conservation of energy
The term generally associated with the science of the force exerted by water in motion, such as driving a turbine connected to an electric generator.
Hydrodynamics
An exposed or enclosed upright panel carrying switches and other protective, controlling and measuring devices for electric machinery and equipment.
Switch board
It is a type of RAM that uses a capacitor to store each bit. The problem is that the capacitor loses the charge very quickly. Therefore, this type of RAM has to be refreshed to keep the data valid.
DRAM
The range of specific speed for a radial-type centrifugal pump:
500 to 3000 rpm
The surge arrester for devices less than 1,000 volts connected by copper conductor to ground electrode conductor or equivalent grounding terminal shall NOT be smaller than ______.
2.0 mm²
A shaft made of good quality steel breaks in half due to fatigue. What would the surface of the fracture site look like?
Smooth over most of the surface, with tearing at the location of fracture
For a fluid, viscosity is defined as the constant of proportionality between shear stress and what other variable?
Spatial derivative of velocity
EMT shall not be used _____.
where protected from corrosion solely by enamel
A circular shaft subjected to pure torsion will display which of the following?
Maximum shear stress at the outer fibers.
The acronym RDRAM refers to
Rambus Dynamic Random Access Memory
Which dimensionless number represents the ratio of inertial forces to gravitational forces?
Froude number
The group of metals that include lithium, sodium, potassium, rubidium and cesium forms a closely related family known as the
alkali metals
The branch circuit load for continuous duty receptacles shall be calculated at ________ VA per receptacle.
180
Which of the following types of memory is lost when the power is removed?
RAM
Vertical clearances of all service drop conductors above roofs shall NOT be less than one of the following values.
2,500 mm
Which of the following is NOT a unit of work?
dyne
Metal surface raceways having splices and taps shall be permitted as long as the splices and taps and conductors do not fill the raceway more than _____ percent of the area of the raceway at that point.
75
How are lines of constant pressure in a fluid related to the force field?
They are perpendicular to the force field.
Which of the following best defines a nibble?
Haft a byte of memory
This group of elements readily accept an electron from another atom to form compounds.
Halogens
True or False:
In a cylindrical tank both longitudinal and tangential stresses are dependent on the radius of the vessel.
True
The Sundry Provision relative to the practice of Electrical Engineering is stated in what article of R. A. No. 7920?
Article IV
Kinematic viscosity can be expressed in which of the following units?
m²/s
Does twinning frequently occur in hexagonal close-packed structures?
Yes
Software that is used to translate high-level language to machine code.
Compiler
Surface tension has which of the following properties?
I. It has units of force per unit length.
II. It exists whenever there is a density discontinuity.
III. It is strongly affected by pressure.
I and II
Rule 23 of Article V of the IRR of R. A. 7920 – Issuance and reissuance of Certificate of Registration and Professional License states that “The Professional License shall be renewed every _____ years on the birthmonth of the PEE, REE or RME upon compliance with Continuing Professional Development requirement, unless exempted therefrom, and upon payment of the annual registration fees.
three
Which of the following is qualified as the Chairman of the Continuing Professional Development Council for Electrical Engineering?
PRBEE member
What refers to a slender member which prevents parts of a structure moving to each other under compressive stress?
Strut
To ease with which dislocations are able to move through a crystal under stress accounts for which of the following?
I. Ductility
II. Lower yield strength
III. Hardness
I and II
Which of the following is the definition of a joule?
A N∙m
Which of the following is the computer language that is executed within a computer’s central processing unit?
Machine language
What is the absolute velocity of a real fluid at a surface?
The velocity of the surface.
Dry type transformer rated over _____ volts, shall be installed in vaults.
35,000
Where galvanized steel conduit is used, the primary purpose of galvanizing in which one of the following?
It retards rusting.
Which of the following is NOT an advantage of a superheated, closed Rankine cycle over an open Rankine cycle?
Increased boiler life
If the shear stress in a fluid varies linearly with the velocity gradient, which of the following describes the fluid?
It is a Newtonian fluid.
Wirings allowed to be installed outside the buildings are enumerated below EXCEPT one. Which one is this?
Flat conductor cable
Which of the following statement/s about sound is/are true?
I. All sounds are produced by the vibration of bodies.
II. Sound cannot travel through a vacuum.
III. Sound can be transmitted through some materials.
I, II and III
A description of the arrangements of atoms or ions in a material is called ______.
structure
The term of office of the Board is stated in what section of R. A. No. 7920?
Section 6
A projectile is fired with a velocity v, perpendicular to a surface that is inclined at an angle θ with the horizontal. Determine the expression for the distance R (from point it was fired to the point of impact, measured along the incline).
R = (2v² sin θ)/(g cos² θ)
To which of the following can the large discrepancy between the actual and theoretical strengths of metals mainly be attributed?
Dislocation
What is the MAXIMUM distance from the flooring to the receptacle outlet in dwelling unit in mm?
1800
What information normally would not be transmitted on a microprocessor’s control bus?
Contents of data registers
How does an adiabatic process compare to an isentropic process?
both: heat transfer = 0; isentropic: reversible
What is the maximum allowable voltage drop from the main circuit breaker to the farthest lamp?
5%
Ductility is expressed in terms of _______.
percent elongation or percent area reduction from a tensile test
What law states that for all adiabatic process between two specified states of a close system, the net work done is the same regardless of the nature of the closed system and the details of the process?
First Law of Thermodynamics
Which work mode is a nonequilibrium work mode?
Energizing an electrical resistor
The shape of the bending moment diagram over the length of beam, having no external load is always ______.
linear
Which of the following best defined the phrase “likely to become energized”?
Failure of insulation
Who is the present Chairman of the Board of Electrical Engineering?
Francis Mapile
Convection heat transfer involves both:
Conduction and advection
What refers to the establishing interrelationships between people and things in such a way that human and material resources are effectively focused toward achieving the goal of the company?
Organizing
Which of the following in the thermodynamics is considered as the heat content of a system?
Enthalpy
Electrical equipment must be grounded to ensure that dangerous voltage on metal parts resulting from a ground fault can be reduced to a safe value.
I. True
II. False
II only
How tall does a wall mirror have to be in order for you to see all of yourself in the mirror? Imagine you stand a distance “d” from the mirror and your height is “h” and L is the length of mirror required.
L = 1/2 h
The electric power industry was divided into four sectors by R. A. 9136 namely: generation, transmission, distribution and _______.
supply
A megabyte is exactly ______ bytes.
1,048,576
When the current in an electrical circuit is given multiple paths on which to flow, current will take:
All available paths
The Chairman and members of the Board of Electrical Engineering are appointed by _______.
President of the Philippines
What refers to the point in which bending moment changes sign through a zero value in strength of materials?
Point of contraflexure
What physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling?
Melting point
Which of the following would be identified with a control volume in thermodynamics?
Filling a tire with air at a service station
Which of the following material has the least modulus of elasticity?
Glass
Branch circuit conductors supplying a single motor shall have an ampacity of how may percent of its rated full-load current?
125%
The ratio of shear stress to shear strain is called:
Modulus of rigidity
“The earth” best defines of which of the following term?
Ground
The PEC Part 1 2017 Edition is intended as a design specification or an instruction manual to qualified person.
I. True
II. False
I only
The amount of property in which a willing buyer will pay to a willing seller for the property when neither one is under the compulsion to buy nor sell is called _____ value.
market
Which is NOT a characteristic of ionic compounds?
They have low boiling point.
Which of the following is a natural magnet?
Lodestone
What is another term for modulus of rigidity?
Shear modulus
HTTP:// is an identifier that appears at the beginning of most Web page. What does HTT stands for?
Hypertext Transfer Protocol
What technique a manager must use if he decides to absorb the risk in the project?
Create buffer in the form of management reserve or extra time in schedule
What is a coal that has been previously burned in an oxygen-poor environment?
Coke
Which of the following reason/s why reactions generally proceed faster at higher temperature?
I. The molecules collide more frequently.
II. The activation energy is less.
Both I and II
Reynold’s number is the ratio of ______ to ______ in a liquid.
inertial force; viscous force
Risk management is:
controlling risk
An engineer is required to finish a certain engineering job in 20 days. He is said to be _____ if he finished the job within the required period of 20 days.
effective
The usual function of a disconnect switches in high voltage circuits is to ______.
isolate from energized buses, equipment which are not in service
Which of the following are used in designing and documenting complex processes or programs that help to visualize what is going on and thereby help the viewer to understand a process or algorithm?
Flowcharts
What is the interest accrued over the interest period is also subject to the interest rate in the next period?
Compound interest
What is the standardized communication technique for expressing instructions to a computer?
Programming language
What does R. A. 9136 stand for?
Electric Power Industry Reform Act of 2001
Which of the following done “NOT” affect the owner’s equity?
License to start the business
In thermodynamics our attention is focused on which form of energy?
Internal energy
What law of nature underpins the concept of a balanced chemical equation?
Law of conservation of mass
What refers to the luminous flux emitted by a light source per watt of power input?
Luminous efficiency
The point that connects the saturated liquid line to the saturated vapor line is called the ______.
critical point
Which of the following refers to the parallel axis theorem for second moment of area for strength of materials?
Steiner`s theorem
The following valves are used for shut-off service. Which one is NOT included?
Plug cock
Which of the following is a quasiequilibrium process?
Compression of air in a cylinder
Which of the following Republic Act that provide framework for the restructuring of the electric power industry including the privatization of the assets of NPC, the transition to the desired competitive structure?
9136
An adiabatic process is characterized by which of the following?
The heat transfer is zero.
“An external pressure exerted on a fluid is transmitted uniformly throughout the volume of the fluid”. This statement is known as ______.
Pascal`s principle
Buying insurance is a form of:
Risk sharing
What refer to ions that are NOT involved in the overall reactions?
Spectator ions
The clearance between conductors and roof where the service conductors are passing over roofs must be ______ mm.
2500
Which of the following does NOT transfer work to or from a system?
A membrane that bursts
What is the standard color for safety signages to indicate the presence of radiation hazards example in the X-ray laboratory in the hospital?
Purple with combination of yellow
The mathematical expression (1 + i) raised to n in Engineering Economics is referred to as the _______.
compound amount factor
What is the classification of a turbine if the water moves along the vanes toward the axis of rotation of the runner?
Axial flow
What do you call the ability to convert assets to cash quickly?
Liquidity
Encryption can provide all of the following features of information systems security EXCEPT _________.
privacy
What is the metal used to recover copper from a solution of copper sulphate?
Fe
What is the principle works in the hydraulic brakes of an automobiles?
Pascal`s Law
If you are appointed as a division manager, which of the following task is MOST likely you will do?
Set goals
Which of the following cast iron is heat-treated for ductility?
Malleable iron
Which of the following portion of hard disk space served as RAM?
Virtual memory
What is defined as the work done on a unit volume of a material, as a simple tensile force is gradually increased from zero to the value causing the material to rupture?
Modulus of toughness
Which of the following anchor is designed for medium and heavy weight fastening in solid materials?
Stud-bold anchor
The center of mass of a system particles will _________ if it is initially at rest and the external forces sum to zero.
remain the same
The demarcation between laminar and turbulent flow is:
Critical Reynolds number
The first metal used by man was _______.
copper
The ratio of current assets (exclusive of inventory) to total current liabilities.
acid test ratio
The wound spring of a clock possesses:
potential but no kinetic energy
A ball is thrown upward into the air with a speed that is greater than terminal speed. It lands at the place where it was thrown. During its flight the force of air resistance is the greatest:
just after it is thrown
Which one of the following is standard temperature and pressure (STP)?
0°C and one atmosphere pressure
What is the temperature rating of THW insulation?
75°C
A watt · second is a unit of:
energy
In this pump, the head developed is due to the push of the vanes and flow is almost entirely axial.
propeller-type impeller centrifugal pump
The __________ of a rocket is the force of the exiting fuel gases on the rocket
thrust
What is the strong bond between hydrogen atoms called?
The covalent bond
The grounded conductor of a mineral-insulated, metal-sheathed cable shall be identified at the time of installation by ______ marking at its termination.
distinctive
Which statement is true for a fluid?
It cannot sustain a shear force at rest.
Any unguarded metal sheathed service cable, service conduits, metal fixtures and similar noncurrent carrying parts, if located in urban districts and where liable to be charge to more than a certain voltage to ground shall be isolated or guarded so as not to be exposed to accidental contact by unauthorized persons. What is this voltage?
300 V
Two thin converging lenses of focal lengths f₁ and f₂ are coaxial and placed very close together. What is the effective focal length of the combination?
(f₁f₂)/(f₁ + f₂)
What is the most abundant rare gas in the atmosphere?
Ar
The bulk modulus is a proportionality constant that relates the pressure acting on an object to:
the fractional change in volume
The gravitational constant G has the derived units:
N · m²/kg²
The Central Processing Unit of the computer is a combination of _______.
arithmetic logic and control unit
A disk is free to rotate on a fixed axis. A force of given magnitude F, in the plane of the disk, is to be applied. Of the following alternatives the greatest rotational acceleration is obtained if the force is:
applied tangentially at the rim
When the speed of a rear-drive car is increasing on a horizontal road the direction of the frictional force on the tires is:
backward for the front tires and forward for the rear tires
A wheel starts from rest and spins with a constant rotational acceleration. As time goes on the acceleration vector for a point on the rim:
increases in magnitude and becomes more nearly radial
The branch circuit load for drying equipment is the larger of either the VA rating of the nameplate
or ________.
5,000 VA
In each conduit run entering an enclosure for switches, circuit breakers, relays and others that may produce high temperatures, seals on the conduit shall be installed with a certain length before entering the enclosure. What is this length?
460 mm
Type SE service entrance cable shall be permitted in interior wiring system where all of the circuit conductors of the cable are of the _______ type.
I. Rubber-covered
II. Thermoplastic
III. Metal
I and II only
The type of pump operating with a speed of 1150 rpm, capacity of 3500 gpm, and a total head of 100 ft is the ______.
Francis-type pump
The speed of a sinusoidal wave on a string depends on:
the tension in the string
What is otherwise known as Electric Power Industry Reform Act of 2001?
R. A. No. 9136
It is a fluid flow where the density cannot change with time or location
incompressible flow
In sound this refers to the combination of two waves of slightly different frequency
Beats
Surface tension has which of the following properties?
I. It has units of force per unit length.
II. It exists whenever there is a density discontinuity.
III. It is strongly affected by pressure.
I and II
I. It has units of force per unit length.
II. It exists whenever there is a density discontinuity.
An oscillator is subjected to a damping force that is proportional to its velocity. A sinusoidal force is applied to it. After a long time:
its amplitude is constant
An electrician should consider all electrical equipment live unless he definitely knows that they are not. The main reason of this practice is to avoid:
Personal injury
Bernoulli’s equation can be derived from the conservation of:
energy
Which material type usually has a higher index of refraction?
Denser materials
Section 35 of R. A. No. 7920 is about _______.
Practice Not Allowed for Firms and Corporations
The R. A. 7920 consists of how many sections?
45
Power and control tray cables (type TC) maybe used where installed in industrial establishment where a registered master electrician will service the installation
True
Vertical clearances of all the service drop conductors above roof shall NOT be less than one of the following values.
2,500 mm
At points in a sound wave where the gas is maximally compressed, the pressure
is a maximum
Possible units for the coefficient of volume expansion are:
1/°C
Service overhead conductors to a building or other structure (such as a pole) on which a meter of disconnecting means is installed shall be considered as a ______and installed accordingly.
service drop
Each member of the board of EE should be a natural born Filipino citizen and a resident of the Philippines for at least _____ consecutive years.
5
What is the heaviest subatomic particle?
Neutron
Wet niche or no niche lighting fixtures that are supplied by a flexible cord or cable shall all exposed noncurrent carrying metal parts grounded by an insulated copper equipment grounding conductor not smaller than the supply conductors and not smaller than _____.
16
Constant-volume gas thermometers using different gases all indicate nearly the same temperature when in contact with the same object if:
the particle concentrations are all extremely small
Consider two imaginary spherical surfaces with different radii, each centered on a point sound source emitting spherical waves. The power transmitted across the larger sphere is ______ the power transmitted across the smaller and the intensity at a point on the larger sphere is ______ the intensity at a point on the smaller.
the same as, less than
It is the pool of storage for the CPU and can be written to/read from in any order.
RAM
In order that a single process be both isothermal and isobaric:
a change of phase is essential
It is a single suction pump having its suction nozzle on the opposite side of the casing from the stuffing box and having the face of the suction nozzle perpendicular to the longitudinal axis of the shaft.
End suction pump
It is the memory that has imprinted in it data and programs for the CPU which cannot be erased or written to.
ROM
Which of the following circuits is used as a “memory device” in computers?
Flip flop
Which of the following memory is non-volatile?
ROM
The R. A No. 7920 was approved on ______.
February 24, 1995
Mechanical losses in centrifugal pumps include the frictional losses in the bearings and packing boxes and are usually taken to be _______ percent of the brake power.
2 to 4
A manufactured assembly designed to support and energize lighting fixtures that are capable of being readily repositioned is ______.
lighting track
An electronically actuated fused generally consists of an interrupting module that interrupts current when an overcurrent through it
False
The flow in which the paths of the individual particles of fluid do not cross each other.
Laminar flow
All successful candidates in the examination shall be required to take a professional oath before the Board or any government official authorized to administer oaths prior to entering upon the practice of professional electrical engineer, registered electrical engineer, and registered master electrician. This is found in what section of R. A. No. 7920?
Section 22
The mass number of an atom is equal to:
the number of nucleons
What percent of the human body is carbon?
18%
What is Section 40 of the R. A. 7920 about?
Penalty Clause
Which is the basis for Bernoulli’s law for fluid flow?
Principle of conservation of energy
A device used to determine the specific gravity of liquids.
Hydrometer
The chairman and members of the board is appointed by _______.
President of the Philippines
Where receptacles are connected to a 30-A branch circuit, the maximum allowable cord and plug connected load shall not be more than _____.
24
The vertical difference between the pumping water level and the static water level.
Drawdown
The specific speed of a Francis-type impeller centrifugal pump ranges from:
1 500 to 4 500 rpm
Under what condition is mass conserved in fluid flow?
It is always conserved.
What form of software can also be called firmware?
System BIOS
For raceway 20 mm trade size or larger containing conductors 22 mm² or larger, the minimum length of the box in straight pulls shall NOT be less than _______ times the trade diameter of the largest raceway.
8
The overall energy program formulated and updated yearly by the DOE and submitted to Congress pursuant to R. A. No. 7638 is the _______.
Philippine Energy Plan (PEP)
A substance formed by the union of two or more chemical elements in a definite proportion that can be only be separated by chemical means.
compound
True of False:
The use of an inductive ballast for fluorescent lamps is usually because it is the most efficient.
False
One nibble is equal to ______.
4 bits
Rigid non-metallic conduit approved for direct burial without concrete encasement shall have a minimum burial of _____.
460 mm
Who are exempted from examination and registration under the R. A. No. 7920?
Foreign Electrical Engineers employed as technical consultants
Pascal-second is the unit of:
Dynamic viscosity
If the Reynold’s number is less than 2000 then it is a ______ flow
Laminar
If the Reynold’s number is greater than 2000 but less than 4000 then it is a _______ flow
Transitional flow
If the Reynold’s Number is greater than 4000 then the flow is _____
Turbulent
What is the definition of pressure?
Limit of force/area as area approaches zero
It is the kind of flow when the velocity of successive fluid particles, at any point, is the same at successive periods of time
Steady flow
An ideal fluid is _____.
frictionless and incompressible
It is a substance that cannot remain at rest under action of any shear force
Fluid
What is the unit of kinematic viscosity?
cm²/s
The region between the separation streamline and the boundary surface of the solid body is known as _____.
wake
Is it true that Blasius boundary layer solution is valid only for potential flow.
No
The center of buoyance always:
Coincide with the centroid of the volume of fluid displaced
An aspirator of vacuum pump that creates a negative pressure on the filtrate side of the filter to hasten the process of filtering.
Filter pump
The mechanics of water or other liquids whether at rest or in motion is known as:
Hydraulics
Transformer exceeding 112.5 kVA, shall not be located within ______ from combustible materials on the building.
300 mm
An equation for fluid flow based on the first law of thermodynamics which states that the heat input into the system added to the work done on the system is equal to the change in energy of the system.
Energy equation
As a general rule, equipment rated 1,000 A or more and measuring more than 1,900 mm wide, containing OCD, shall have an entrance at both ends of the switchboard room. The width and height of each entrance shall NOT be less than the following dimensions. Which one is correct?
600 mm wide and 2,000 mm high
Feeders should be of such size that the voltage drop up to the final distribution panel should NOT exceed:
3 %
In all case where there are energized parts on the front of the switchboard or motor control centers, the working space in front of such equipment shall NOT be less than a minimum distance. What is this distance?
1,000 mm
There are situations where deviations from the code requirements are necessary. Before such deviations are made, there must be a written permission from one of the following entities. Which one is this?
Board of Electrical Engineering
When pulling wires into a conduit, a certain percent of the conduit area should unoccupied. What is the purpose of this?
To allow pulling in the wire without strain on the conductors or abrasion
Low-carbon steels are generally used in the “as rolled” or “as fabricated” state. What is the reason for this?
Their strength generally cannot be increased by heat treatment.
What is the most electropositive element among the following?
Cs
Na
Ca
Li
Cs
A test designed to determine the amount of underground water available in a given field and proper well spacing to avoid interference in that field.
Aquifer performance analysis
On an alloy phase diagram, it is the temperature of the solid phase at which the first liquid forms for a given overall composition.
Solidus temperature
Which of the following listed materials is considered among the best insulation material for motor rewinding?
Fish paper
A thin homogeneous metallic plate containing a hole is heated sufficiently to cause expansion. If the coefficient of surface expansion is linear, the area of the hole will:
Increase at the same rate as the area of the metal increases.
Steel can be strengthened by all of the following practices EXCEPT:
Annealing
Equipment to be installed shall be fully specified in the name plate EXCEPT which of the following considered optional?
Date Manufactured
Any motor application shall be considered as _____ duty unless the nature of the apparatus it drives is such that the motor will not operate continuously with load under any condition of use.
continuous
The relationship between the expansion of a spring and the force required to produce the extension is:
F = kx
Hooke’s law for an isotropic homogeneous medium experiencing one-dimensional stress is:
Stress = E(strain)
It is the measure of a material’s ability to store strain energy
Modulus of resilience
Young’s modulus of elasticity for a material can be calculated indirectly from which of the following properties of the material?
Density and velocity of sound in the material
No-metallic sheathed cable shall not be permitted for the installation in the following locations EXCEPT:
dry location
Defined as the unit shear stress divided by the unit shear deformation
Modulus of rigidity of steel
What is the metric size equivalent of 1,000 MCM?
500 mm²
Force/Area = length/change in length
elastic range
If 1080 steel (0.80 wt. % C) is annealed by very slow cooling from 1000°C to ambient temperature, its microstructure will consist almost solely of:
Austenite
Where a transformer vault is constructed with other stories below it, the floor shall have a minimum fire resistance of 3 hours unless ______.
protected with automatic sprinkle
Is Poise a unit of absolute viscosity?
No
An overcurrent trip unit of a circuit shall be connected in series with each _____.
ungrounded conductor
The instantaneous position of all fluid particles that passes through a given point is known as _____.
streak line
In computer, what does URL stand for?
Uniform Resource Locator
During an isothermal process, ______.
the system temperature remains constant
It is a type of RAM that does not “lose its mind” if not refreshed. This is typically used in caches and is usually more costly.
SRAM
Which of the following is TRUE regarding the minimum attractive rate of return used in judging proposed investments?
It is frequently a policy decision made by an organization’s management.
Accounting book in which are recorded the credits and debits of commercial transactions.
Ledger
Which of the following does NOT affect owner’s equity?
License to start operation
Which is the origin of the energy conservation equation used in a flow system?
The first law of thermodynamics
A centrifugal pump with one or more impellers discharging into one or more bowls, and vertical or column pipe used to connect the bowls to the discharge head on which the pump drivers is mounted.
Vertical shaft turbine pump
A rigid container is heated by the sun. There is no shaft work associated with the container. From the First law of thermodynamics, what is the resulting work equal to?
Zero
Fixtures in clothes closets shall be _____,
I. a surface-mounted or recessed incandescent fixtures with a completely enclosed lamp
II. a surface-mounted or recessed fluorescent fixture
III. pendant fixture
I and II only
Absolute viscosity of a fluid varies with pressure and temperature and is defined as a function of:
Shear stress and angular deformation rate
The maximum bending moment of a beam simply supported at both ends and subject to a total load w uniformly distributed over its length L is expressed by the formula:
wL/8
The mass moment of inertia of a cylinder about its central axis perpendicular to a circular cross section is directly proportional to its _________
length
Principal stresses occur on those planes where the shearing stress is __________
zero
The three moment equation may be used to analyze:
A continuous beam
Poisson’s ratio is the ratio of the:
Unit lateral deformation to the unit longitudinal deformation
The ratio of the moment of inertia of the cross section of a beam to the section modulus is a measure of _________
distance
The stress in an elastic material is proportional to the ________ of the material acted upon by the force
displacement
When an air entrainment agent is introduced into a concrete mix:
The strength will decrease
The linear portion of the stress-strain diagram of steel is known as the ______.
elastic range
The differential of the shear equation is which of the following?
Load on the beam
Entrance losses between tank and pipe, or losses through elbows, fittings and valves are generally expressed as functions of:
Kinetic energy
A thin walled pressurized vessel consists of a right circular cylinder with flat ends. Midway between the ends the stress is greatest in what direction?
Circumferential
