ESAS TRIVIA 23

This republic act is referred to as Anti-electricity and Electric transmission lines and materials pilferage act of 1984.

RA 7832

RA 7832 was approved on

Dec 8, 1994

If found guilty of illegal use of electricity (Sec. 2 of RA 7832) the penalty will be

fine P10,000 to P20,000 or prison mayor or both

If found guilty as theft of electric power transmission line materials (Sec. 3 of RA 7832) the penalty will be

Reclusion temporal or fine 50,000 to 100,000 or both

Which command is used to clear a command window?

clc

To determine whether an input is MATLAB keyword command is?

iskeyword

Command used to display the value of variable x

disp('x')

Command is used to save command window text to file

diary

Which of the following will correctly define x, y and z as symbols?

syms xyz

Which command enables a title for the x-axis in Matlab?

xlabel()

Which command gives a title to the graph plotted by MATLAB?

title()

How can several graphs for the same function be plotted on the same window?

Contour plot

What is the slope of the sawtooth waveform generated by the sawtooth command?

1/pi

Which command in Matlab is suitable to change the axes of the graph plotted?

axis

Which MATLAB toolbox provides the plot command?

Signal processing toolbox

In 2-D plot in MATLAB, which command will make the axes of the graph same?

axis square

his MATLAB command clears all data and variables stored in memory.

clear

What is the chemical formula for nitric acid?

HNO₃

what is the stress in material which is heated freely?

zero

In a queuing process of customers in a store, what type of distribution most likely governs the time between consecutive arrivals of customers?

exponential distribution

Nylon is a synthetic polymer belonging to which class of polymers?

polyamides

If the door of a refrigerator is left open for a few hours, the room temperature will

increase

Which of the following quantities have the same SI unit as that of modulus of elasticity?

Energy per unit volume

Which of the following represents volumetric strain?

ΔV/V

Hooke’s law defines

volumetric stress

Humidity is simply the amount of ______ held in the air.

water vapor

A device to measure humidity is called.

hygyrometer

At 100% relative humidity no water will evaporate from the wet bulb and the reading on both thermometers (ordinary and wet bulb) will be.

the same

Due point occurs when the same mass of air has relative humidity of.

100%

Which sensor measures the moisture level using humidity?

capacitive sensor

The law of conservation of mass states that,

mass is indestructible

It is the temperature at which liquids starts to boil or the temperature at which vapors begin to condense.

saturation temperature

It is the saturation temperature.

kelvin

It is the percent by weight that is saturated vapor.

quantity x

A room in 9m² and contains 72g of water vapor at 25°C. Calculate the relative humidity in the room if it is sealed such that no mass transfer is allowed. The saturated water vapor pressure at 25°C is 3.17kPa.

31.26%

A closed system contains 47.7g of water vapor. If 12.5g of water vapor is needed for saturation, find the relative humidity of the system.

79.24%

The e’eng materials known as plastics are more correctly called

polymers

What is the combination of two or more materials that has properties that the components material do not have by themselves?

composite

What is the ratio of stress to strain in material loaded within its elastic range?

modulus of elasticity

What is the resistance of material to plastic deformation?

hardness

Material’s elastic limit?

proportional limit

As per RA 11361, tall growing plants refer to plants, vines and other plant species which grow or have the potential to grow more than ______ in height from the ground.

3m

The process use in cooling an aircraft is called

Reversed Brayton

A railroad is to be laid off in a circular path. What should be the radius if the track is to change direction by 30° at a distance of 157.08m?

300m

Young’s modulus is the ratio of the normal stress to?

Normal strain within elastic limit

The ratio between tensile stress and tensile strain or compressive stress and compressive strain is called.

modulus of elasticity

Which of the following is not a source of industrial noise?

sun

Which of the following is not a source of external noise?

thermal agitation

What is the primary cause of atmospheric noise?

lightning

Which of the following is not a source of noise?

atmospheric effect

When an engineer enters management, what is the most likely problem he finds difficult to acquire?

D.

What is the first step in project planning?

establish the objective and scope

Which of the following is the balanced equation of the given oxidation-reduction equation.
3P + HNO₃ + H₂O → NO + H₃PO₄

3P + 5HNO₃ + 2H₂O → 5NO + 5H₃PO₄

What is the maximum bending moment in the uniformly distributed load over its entire length with a total load of w simply supported beam at both ends carries a uniformly distributed load over its entire length with a total load of w?

WL/8

Where is water hammer developed?

Penstock

What is the function of surge tank?

relieves water hammer

What is the function of pump storage scheme?

improve plant capacity factor

Hydro-graph is a graph that shows?

load curve

How is Young’s Modulus of elasticity defined?

P.L/A.ΔL

The permanent mode of deformation of material is

plasticity

The ability of a material to resist plastic deformation is

yield strength

Deformation that occurs due to stress over a period of time

creep

The sharing of a medium and its link by two or more devices is

multiplexing

Multiplexing is used in?

circuit switching

Multiplexing provides

both efficiency and privacy

What does PPE stand for?

Personal protective equipment

Why should accidents in the workplace be reported?

Why should accidents in the workplace be reported?

What should you wear to increase visibility in the work place?

high visibility clothing

Which safety equipment is essential for working at heights?

safety harness

What should workers do before using a ladder?

Inspect the ladder for defects

What is the primary goal of fall protection measures?

Prevent falls and protect workers

What is the purpose of hazards signs and labels on construction sites?

To warn about potential danger

What should workers do before using electrical equipment?

Check for frayed cords or exposed wires

A garden hose fills a 32L washtub in 120 seconds. The opening at the end of the hose has a radius of 1cm. How fast does the water travel as it leaves the hose in m/s?

0.85

Which law states that for a confined fluid, the pressure at a point has the same magnitude in all directions?

Pascal’s Law

What is the subject that encompasses the procurement and production of metals?

Metallurgy

The purpose of copper in steel alloying is to increase

atmospheric and corrosion resistance

A body was dropped from a height h, above the floor. If the height is made 4 times h, the velocity of the body as it hits the floor will be

2V

A 40kg boy walks on a 60kg log with a speed of 1.5 m/s. What will be the speed of the log with respect to the shore.

1m/s

Assuming i=annual rate of return, n=number of years, f=future worth and P=present worth, what is the future worth of a present worth P.

P(1+i)^n

It is a transmission mode of communication which is unidirectional.

simplex

It is a transmission mode of communication where each station can transmit but not at the same time.

half-duplex

It is an example of full duplex communication system.

telephone network

It is a transmission mode of communication where both stations can transmit and receive at the same time.

full duplex

is an example of simplex mode of communication device.

keyboard

A car travels 100km to city A in 2hrs, then travels 200km to city B in 3hrs. What is the average speed of the car for the entire trip?

60 kph

How many atoms are there in Body Centered Cubic (BCC) crystal?

2

What is the color used for equipment grounding conductor?

green

What is the Renewable Energy Act of 2008?

RA 9513

In Matlab, what command is used to obtain the roots of a polynomial f.

r=roots(p);

In Matlab, what will be the output for the block below with code p=[132];roots(p).

r = [-2,-3]

In Matlab, what is the nature of the arrangement of the coefficient to store the following expression in y=a+bx+cx²+dx³

y=[3,0,0,1,0,6]

What is the unit of rigidity?

kg/m³

What is a structural member supported horizontally and carries transverse loading?

beam

Which of the following structural member is used in the transmission of torque and twist?

shaft

What do you call a framework composed of members joined at their ends to form a rigid structure?

truss

The principle states that “where the velocity of fluid is high, the pressure is low and where the velocity is low the pressure is high”.

Bernoulli’s Principle

It is defined as the measure of the amount of negative loss in the water?

alkalinity

What is the charge of Alkali Earth Metals?

+2