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1
When a submarine dives to a depth of 120 m, to how large total pressure is its exterior surface subjected? The density seawater is about 1.03 g/cm^3
1.21 MPa
2
What is the wavelength of the sound emitted by violin string vibration 500 times per second? Assume the velocity of sound to be 1,100 m/sec
2.2 m
3
What is the capitalized cost of a machine with an initial cost of P250,000.00, a maintenance cost of P10,000.00 per year, and an infinite life? The effective annual interest rate is 10%
P350,000.00
4
Find gauge pressure of sea water of specific gravity of 10.1 kN/m^3 at 100 m head
1010 kPa
5
A sealed tank contains 27°C at a pressure of 2 atm If the temperature increases to 100°C. the pressure inside the tank will be?
2.49 atm
6
What is the empirical formula for nitric acid?
HNO3
7
What physical property of a maternal refers to the highest potential difference that an insulating material of a given thickness can withstand for a specified time without occurrence of electrical breakdown through its bulk?
Dielectric Strength
8
Which is NOT a requirement for PRBEE?
At least 40 yrs old, good moral conduct
9
Use of copper in steel alloying
Increase atmospheric corrosion resistance
10
If the gram equivalent weight of H2SO4 is 1.22, it is dissolved in water to make 175 Liter solution. What is its Normality?
0.70 N
11
A thunder is heard 4 seconds after a flash of lightning appears and the temperature is 40°C How far is the source of sound? Consider speed of sound at STP is 332 m/sec
1.424 km
12
Which statement about area moments of inertia is FALSE?
The area moment of inertia arises whenever the magnitude of the surface force varies linearly with distance
13
An essential part of a large dam and provides an efficient and safe means of releasing flow water that exceeds the design capacity of the reservoir
Spillway
14
The MATLAB command will correctly define x, y, and z as symbols?
syms x y z
15
What horizontal pull is needed to move a 6 kg sled with a coefficient of friction of 0.4 and a frictional force of 20 N?
20 N
16
A stone is dropped down a well and 5 sec later the sound of the splash is heard. If velocity of sound is 1100 ft/sec, what is the depth of the well
352.55 ft
17
What is the percent of alcohol in a 90-proof whisky?
45%
18
As per OSHS what is the rule number for health and safety committee?
1040
19
It is a financial action that does not promise safety of the initial investment along with the return on the principal sum
speculative capital
20
The standard atmospheric pressure is _____ kPa
101
21
What is the generic name of a class of polymer which is commercial known as nylon?
Polyamide
22
Which of the following is not true about ideal gases?
They do not apply pressure
23
The overall energy program formulated and updated yearly by the DOE and submitted congress pursuant to R.A. 7638 is known as PEP which means
Philippine Enegry Plan
24
A hygrometer is an instrument to measure
relatice humidity
25
In electrolysis, the anions migrate to the anode Which of the following ions migrate to the other electrode?
Cations
26
A P2,500 loan was originally made at 8% simple interest for 4 years. At the end of this period the loan was extended for 3 years, without the interest being paid, but the new interest rate was made, 10% compounded semi-annually How much should the borrower pay at the end of 7 years?
P4,442.32
27
Which of the following are NOT units of pressure?
kg/m^2
28
. How many calories are required to raise 20 kg of aluminum (Cp=0.208 BTU/lbm-°F) from 80°C 600°C?
2.163x10^6 Cal
29
Which of the following insulation color identity the grounded conductor of a branch circuit?
White
30
Device that transmits two or more signals at the same time
A. Multiplexer
31
What is the charge of elements that belongs to group 2A (IIA)
+2
32
Point at which solid, liquid and vapor forms of a substance simultaneously exist
Triple
33
The LCD display of a portable computer is powered by
low voltage DC
34
How does an adiabatic process compare to an isentropic process
both: heat transfer = 0; isentropic: reversible
35
How many atoms are in the unit cell of a body-centered cubic (BCC) structure
2
36
What is the value of "A" after this program segment is performed? A = 0 DO 771 = 1.4 77 A=A+1
10
37
is an act of sending e-mail or emating wett pages that are designed to collect an individual's online bank credit card or other login information
Phishing
38
In MS Excel, in cell A2 the input value is equal to 2. at cell B2. the input formula was A2 4/SAS2 The formula at cell B2 is copied to C2 and D2 Where $ means absolute cell reference. What is the output in cell D2?
16
39
MATLAB command for getting the roots of 3x^2-4x+7=0
Roots
40
What cycle is use for cooling system for aircraft?
Bell coleman
41
What field of study encompasses the procurement and production of metals?
Metallurgy
42
Which of the following user-defined header file used in C++?
h
43
Poisson's ratio is the ratio of the
Unit lateral deformation to the unit longitudinal deformation
44
What is the Law for renewable energy is
R.A 9513
45
If the mass on a body were doubled, its acceleration due to gravity would be
unchanged
46
A simultaneous generation of electricity and steam (or heat) in a single power plant is called:
cogeneration
47
In financial accounting another term for Acid Test Ratio is
Quick ratio
48
A 980kg/m^3 man is floating on fresh water. Find the percent of his volume visible?
2%
49
PEC part 2, 2020 Edition is the
6th edition
50
Who is in-charge in recommending the member of board in case of vacancy?
Commissioner of PRC
51
The chemical process which occurs when water is added to cement is called
hydration
52
A steel rod with a cross-sectional area of 150 mm^2 is stretched between two fixed points. The load at 25°C is 5000 N. At what temperature will the stress be zero? Assume = 11.7×10^-6/°C and E=200 GPa
39.24°C
53
A GFCI should be installed in which location?
bathroom
54
A 60-kg man jumps with a speed of 1 m/sec into a 40-kg log. What is the speed of the log relative to the shore?
0.6 m/sec
55
Shaft work of -15 BTU/lb and heat transfer of -10 BTU/lb, the change of enthalpy of a system by:
+5
56
A 10-kg, 1 meter long cylinder having 50 cm diameter was placed on a level floor, find approximate pressure exerted on the floor?
500 Pa
57
What is the ASTM tension testing designation for standard methods for steel products?
A370
58
On doubling the speed, N. of a centrifugal pump, all of the following are true, EXCEPT
Head, horsepower and volume flow rate are independently variable
59
Tall growing plants refers to plants, vines and other plant species, which grow or have the potential to grow more than __________ in height from the ground
3 meter
60
A boy carried a weighing scale inside an elevator In what way can the boy have the same weight all throughout his ride
Moving at constant speed
61
Unit of Strain is
unitless
62
Which of the following bus has a function of directing memory and I/O devices transfer?
Address
63
A large class of devices (such as turbines, centrifugal compressors and pumps) involves work. Assuming reversible steady-state, steady-flow process with negligible changes in kinetic and potential energy, the elementary work is
-V dP
64
A garden hose has an inside diameter of 0.5 inch and water flows through it at 8 fps What nozzle diameter is required for water to emerge at 40 fps?
0.224 inch
65
A man invests P20,000 now for the college education of his 2 year old son If fund eams 14% effective interest, how much will the son get each year starting his 18th to the 22nd Birthday
P41,583.28
66
Device used to measure the velocity of a liquid?
Pitot tube
67
Work of a polytropic (n=1.21) compression of air (Cp/Cv = 1.40) n a system with moving boundary from P1=15 psia, V1=1.0ft^3 to P2=150 psia, V2=0.15ft^3 is
5150 ft-lb
68
In R.A. 11361, the Prevention and Removal of Power Line Obstruction on Private Propert what section
Sec 8
69
What defines information system?
Composed of people and computers that processes or interprets information
70
Which of the following does NOT contribute noise to a communication system?
None of the above
71
What is the effective rate of interest corresponding to 8% compounded semi-annually?
8.16%
72
A lamp placed 60 cm from a lens forms an image on the screen 30 cm away from the lens on the side opposite lamp. What is the focal length of the lens?
20 cm
73
Find the kinetic energy given mass of 90 kg with velocity of 5 m/sec
1125 N-m
74
Unit of Young's Modulus
Kg/cm^2
75
What is Rule 11 in R.A 79207
Places and Dates of Examinations
76
What refers to the negotiable claim issued by a bank in lieu of a term deposit
Certificate of Deposit
77
Divide (15) base 16 by (011) base 2 Express the answer in base 10
7
78
.A 20-mm diameter steel rod, 250 mm long is subjected to a tensile force of 75 kN. If the Poisson's ratio u is 0.30, determine the lateral strain of the rod. Use E=200 GPa
εy=-3.581×10^-4 mm/mm
79
The temperature of a body is 50°F, find the temperature in deg. Rankine
509.7
80
What is the minimum size of stainless steel grounding rod as specified by PEC?
16 mm
81
A simple beam L meters long carries a concentrated load of "P" Newtons at the midspan the maximum bending moment of the beam?
PL/4
82
What is called weight per unit volume of a substance
Specific weight
83
Dy default, all the files in C are opened in
Text
84
A 150 candela lamp at a distance of 12.37 m gives a sufficient illumination on a certain wort plain. How far a 250 candela tamp be placed to have the same illumination?
15.97 m
85
A Camot engine operates between 250°F and 1200°F. What is the thermal efficiency?
57.23%
86
A typical jet fighter plane launched from an aircraft carrier reaches a take-off speed 175 mi/hr in a launch distance of 310 ft. How long in seconds doe's it take to launch the fighter?
2.4
87
In an aqueous solution, if some acid is added, its pH will
decrease
88
A child on a sled is sliding down the hill covered with snow. The combined mass of the child and the sled is "m", the angle of inclination of the hill is "φ" (phi), and the coefficient of kinetic friction between the snow and the sled runners is "µ" (mu). Which of these expressions gives the frictional force?
µ mg cos φ
89
Cash-out Casinos is considering purchasing new slot machines. The Present Worth (PW) of Alternative A is Php19,437, the Annuity Worth (AW) of Alternative B is Php8 352 the Future Worth (FW) of Alternative C is Php20,439, and the Rate of Return (ROR) of Alternative D is 5% Assuming all alternatives have a 3-year useful life and that the Minimum Attractive Rate of Retum (MARR) for Cash-out is 9%. What alternative that should be chosen?
Alternative A
90
The property of a fluid which determines its resistance to shearing stress is called
Viscosity
91
What is the SI unit of luminous intensity
candela
92
What is the volume flow rate of water in Liters/sec if the power developed under a head of 400 m is 12,500 kW and the hydraulic efficiency 80%
3982
93
Under which of the following conditions is Bernoulli's equation valid?
All of the above
94
Current in an electrical circuit will take to return to the source
only the path of least resistance
95
What is the reason the code requires each separate phase conductor to be located in the same raceway?
to reduce inductive heat
96
Which of the following is the busiest bus and the one that carries that actual data?
Data bus
97
Future worth is equivalent to
P(1+i)^n
98
Which of the following is not a Distance relay?
Differential Relay
99
The MATLAB command use for clear window
clc
100
A 100 kg block rests on a 40 deg inclined plane Neglecting friction how much pull must one exert to bring the block up?
64.3 kg