問題一覧
1
Which one of the following is NOT a scalar quantity?
Displacement
2
Find the resultant of the coplanar forces 80 lbs at - 30deg . and 60 lbs at 60 deg.
100 lbs at 6.87 deg
3
What prefix refers to 10 to the negative 18th, power?
atto
4
Suppose that the first half of the distance between two points is covered at a speed V = 15 mph and that during the second half the speed is V2 = 45 mph. What is the average speed for the entire trip
22.5 mph
5
A boy leaning over a railway bridge 50 ft high sees a train approaching with uniform speed and attempts to drop a stone down a funnel. He releases the stone when the engine is 80 ft away from the bridge and sees the stone hit the ground 2 ft in front of the engine. What is the speed of the train in mph?
30.2
6
A balloon is ascending at the rate of 12 kph and is being carried horizontally by a wind at 22 kph. If the bomb is dropped from the balloon such that it takes 9 sec to reach the ground, what is the balloon's altitude when the bomb was released?
367.3 m
7
A body weighing 40 lbs, starts from rest and slides down a plane af an angle of 30" with the horizontal for which the coefficient of friction 0.3. How far it moved afler 3 sec
34.81 ft
8
A 120-kg man jumps into a swimming pool from a height of 6 m. It takes 0.4 sec for the water to reduce his velocity to zero. What average force did the water exerts on the man?
-3255 N
9
A 2 kg block of wood rests on a long tabletop. A 5 g bullet moving horizontally with a speed of 150 m/sec is shot into the block and sticks in it. The block then slides 270 cm along the table and stops. Find the speed of the block just after impact
0.374 m/sec
10
What is the force required to punch a 20 mm circular hole through a plate of 25 mm thick steel? Ultimate shear strength of the plate is 350 MPa
549.8 kN
11
A cylindrical water tank is 5 m in diameter and 10 m high. If the tank is to be completely filed determine the minimum thickness of the tank plating if the stress is limiled to 44 MPa
5.57 mm
12
Which of the following is NOT a method by which a single lap rivet joint usually fails?
The rivets fail in tension
13
A welded steel cylindrical drum made of a 10-mm plate has an internal diameter of 1.20 m. Compute the change in diameter that would be caused by an internal pressure of 1.4 MPa. Assume that Poisson's ratio is 0.30 and E = 200 GPa
0.428 mm
14
A solid aluminum shaft of 100-mm diameter fits concentrically in a hollow sleel tube. Determine the minimum internal diameter of the steel tube so that the contact pressure exists when the aluminum shaft carries an axial load compressive load of 750 kN. Assume Poisson's ratio of 0.30 and modulus of elasticity of aluminum to be 70 GPa.
100.04093 mm
15
A cylindrical steel shaft 100 mm in diameter and 2 to a tensile load of 25 kN, with poisson ratio of 0.25. What is the change in volume of this shaft? Take Modulus ofelasticity 200 GPa.
-0.125 cu.cm
16
What torque should be applied to the end of the hallow steel shaft im long having inside and outside diameter of 30 mm and 50 mm respectively in order to produce a twist of 1.5 degrees ? Use G = 80 GPa for shear modulus of steel.
1,110 N-m
17
A cylindrical tank contains off ond water What is the total pressure eat the bottorn of the tank? Consider height of water nd the tank 2.14 m, while that of the oil (sp gr = 0.8) is 0.91m.
28.14 kPa
18
Convert 1200 gallon per minute to liters per mirtute.
4542
19
A horizontal pipe has a constriction in it. At point 1 the diameter is 6 cm, v_{1} = 2 m/sec, p. 180 kPa, while at point 2 the diameter is 2 cm. Find ps
20 kPa
20
Which of the following ratios describes Reynolds number?
Internal foces / Viscous forces
21
Air at pressure of 14.7 psia is pumped into a tank whose volume is 40.5 ft³. What volume of air must be pumped in to make the gage reads 55.3 psi. if the temperature is raised from 70 to 80°F in the process?
189.3 ft^3
22
Find the internal energy of the system if it absorbs 300 cal of heat and at the same time 420 J of work is done on it.
1676 J
23
A cylinder containing ges at 27°C is divided into two parts of equal volume, each of 100 cm, and at equal pressure, by a piston of cross-sectional area 15 cm³. The gas in one part is raised in temperature to 100°C, the other volume is maintained at the original temperature. The piston and walls are perfect insulators. How far will the piston move during the change in temperature
0.723 cm
24
What is the formula for baking sodis (sodium bicarbonate)?
NaHCO3
25
Helium (R=0.4968 BTU/lbm-"F) is compressed isothermally from 14.7 psia and 68°F. The compression ratio is 4. Calculate the work done by the gas
-364 BTU/lbm
26
Pure water is bolling in an open pan at atmospheric pressure. Salt at a temperature equal to that of the boiling water is added. Immediately after the salt dissolves, which of the following will most likely occurs?
the boiling ceases
27
What is the empirical formula for Magnesium Nitrate?
Mg(NO3)2
28
When a system is in equilibrium (not changing with time) but is susceptible to fall into lower-energy states with only slight interaction is called
Metastable stats
29
Zinc sulfide is burned in air to form zinc oxide and sulfur dioxide. What is the balanced equation of reaction?
2ZnS + 3O2 -> 2ZnO + 2SO2
30
A gaseous mixture consists of 2 kg of oxygen, 5 kg of nitrogen and 3 kg of xenon. What is the mole fraction of oxygen gas? Given MW of oxygen, nitrogen, and xenon 32, 28 and 131.3 respectively.
23.7%
31
Steels that are used for drills, cutting tools, and knives are known as
High carbon
32
A solution containing 4.50 g of a non-electrolyte dissolved in 125 g of water freezes at -0.372°C. What is the approximate molecular weight of the solute?
180 g/mol
33
Which of the following does a catalyst change?
the activation energy of a reaction
34
How many closest neighbors does BCC (body centered cubic) atom have?
8
35
In molecules of the same composition, what are variations of atomic arrangements known as?
isomers
36
What energy a photon of blue light have if its wavelenght is 4500 angstrom (A)?
4.42 x 10^-19 J
37
What is the average kinetic energy of the molecules of any gas at 100°C
7.72 x10^-21 Joule
38
A lamp is suspended from a high ceiling with a cord 12 ft long. Find its period of oscillation.
3.85 sec
39
A certain sodium lamp emits 4.45 x10 photons of yellow light per sec. The wavelength of yellow light is 589 nm. What is the radiated power of this lamp?
150 watts
40
A double convex lens has faces of radii 21 and 23 cm. When an object is 25 cm from the lens, a real image is formed 40 cm from the lens. What is refractive Index of the lens material?
1.71
41
When a source of sound is moving with respect to an observer or an observer is moving with respect to the source, the pitch of sound heard by the observer is different from the pitch heard when the source and observer are both at rest. What do you call this change in frequency caused by the motion?
Doppler effect
42
What is the measure of the lumen output per watt input produced by the light source? Of 2 diff. metals
efficacy
43
What is the binary equivalent of the decimal number 2010.47656267
011111011010.0111010
44
Convert (ABC.DEF)18 to (N)
101010111100.11011
45
Which of the following is not required to connect to the internet
Security code
46
RS 232-c is a type of
Interface standard
47
An area of memory that holds the ASCII characters that are being displayed on a monitor is called
screen image
48
What refers to the residual value of a company's assets after all outside abilities (shareholders excluded) have been allowed for?
Equity
49
If P1,000 becomes P1,811.36 terrs when invested at an unknomal rate off interest compounded bimonthly (every 2 months), determine the unknown nominal rate of interest.
12%
50
How much will an investment P1,000,000 earn in 20 yrs compounded annually with an Interest rate 6.5%?
P3,523,645.10
51
A 100 million pounds per year cement plant costs P10,000,000 to built. If the cement sells for 25 cents per pound, what is the return on investment for this plant? Profit after taxes is 10%. Assume that working capital is 25% of fixed capital
20%
52
A machine has an initial cost of P50,000 and a scrap value of P10,000 after 10 years. Find the book value after 5 years using straight line depreciation
P30,000
53
A sinking fund depreciation of P5000, and a capital cost of P100,000 with no final value at the end of 15 yrs, What is the interest rate?
3.77%
54
Sec. 14 (b) (il) states that: Persons in charge of or supervising the operation, lending and maintenance of an electric generating set for private use employing voltages not exceeding 250 Volts and 50 kVA, Provided, that the owner or operator shall be required to have the electric generating set periodically inspected at intervals of not more than by a PEE. an REE on a national, city provincial or municipal government authority exercising jurisdiction over electrical installations.
1 year
55
Appliances fastened in place, connected to branch circuit with other loads shall not exceed __________ percent of the branch circuit rating
50
56
For ranges of 8.75 kW or more in rating, the minimum branch circuit rating shall be:
40 Amp
57
Which of the following electrodes must be supplemented by an additional electrode?
metal ungrounded water pipe
58
Calculate total load current for a 1-phase, 230 Volt branch circuit supplying two-3kW and Using Table 2.20.3.16 (column18) pp. 103 two-4kW wall-mounted oven
42.2 Amp
59
The load for household electric clothes dryers in a dwelling unit(s) shall be either _____ VA or the name plate rating, whichever is larger for each dryer served.
5,000
60
If a live conductor is contacted accidentally, the severity of the electrical shock is determined primarily by:
the contact resistance
61
What is the best definition of velocity?
The derivative of position with respect to time
62
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 6 ft/sec/sec. At the same instant a truck, traveling with a constant velocity of 30 ft/sec overtakes and passes the automobile. How far beyond its starting point will the automobile overtake the truck?
300 ft
63
A 100 kg weight rests on a 30 degree inclined plane. Neglecting friction how much pull must one exert to bring the weight up the plane
50 kg
64
Newton's first law of motion says:
The momentum of a particle remains unchanged in the absence of unbalanced forces
65
An advertisement claims that a certain 1200 kg car can accelerate from rest to a speed of 25 m/sec in a time 8 sec. What average power must the motor produced in order to cause this acceleration? Ignore friction losses.
63 hp
66
Definition of Strain:
deformation per unit length
67
The mathematical statement between stress and strain is
Hooke's Law
68
A steel rod having a cross-sectional area of 300 mm² and a length of 150 m is suspended vertically from one end. It supports a load of 20 kN at the lower end. If the unit mass of steel is 7850 kg/m³ and E = 200 GPa, Find the elongation of the rod
54.44 mm
69
A steel cylindrical tank weighs 35 kg with sp.gr of 7.87 contains a 4 Liter of liquid with density of 997 kg/m³. What is the total mass of the tank?
39 kg
70
Convert a pressure head of 24 inches of mercury to feet of oil sp.gr. of 0.75
36.2
71
What refers to the formation for Collapse of small bubbles of vapors in liquid which caused by combination of reduced pressure and Increased velocity in the fluid?
Cavitation
72
A horizontal air duct reduces in cross sectional area from 0.75 ft² to 0.20 ft. Assuming no losses, what pressure change will occur when 1.5 lb/sec of air flows? Assuming sp. wt. of 0.20 lb/ft³ for pressure and temperature conditions involve.
0.0282 psi
73
When is a floating object stable?
When the center of buoyancy is above the center of gravity
74
The Froude number is a ratio
proportional to the velocity divided by the square root of the characteristics dimension
75
What are the changes in internal energy for reversible adiabatic and isothermal process respectively?
CvΔT and 0
76
Two gases occupies two containers, A and B. The gas in A, of volume 0.12 m³, exerts a pressure of 1.28 MPa. The gas in B, of volume 0. 18 m²³, exerts a pressure of 0.70 MPa. The two containers are united by a tube of negligible volume and the gases are allowed to intermingle. What is the final pressure in the container if the temperature remains constant?
0.932 MPa
77
A tank contains 3 cubic feet of 120 psig air at 80°F. How many tires of volume 1.2 ft³ can be inflated to 28 psig at 80°F?
5.0 complete tires
78
A 5-gim bullet is propelled by a powder charge producing 500 cat of usable energy. What Is the bullet muzzle velocity? Neglect all frictional losses.
915.4 m/sec
79
A 48- wall has an average thermal conductivity of 1.2 BTU-RUM F-hr. If the temperature difference between the two sides is 18°F and the thickness is 0.7 ft. what is the total heat loss lin 5 hours?
7400 BTU
80
What is the formula of a compound with the following gravimetric analysis? Oxygen 13.7%, Hydrogen 5,1%, Carbon = 20.5%, Chlorine = 60.7%
C₂H₂OCl2
81
Which of the following is the formula for acetic acid?
CH3COOH
82
When 10.0 g of silicon dust, Si, is exploded with 100.0g of Oxygen O2. forming silicon dioxide, SiO₂ How many grams of Oxygen remain uncombined? The reaction of the equation is:
SiO2 SIO2. The MW of Si 28, MW of O2 = 32
68.5 gr
83
How many grams of potassium dichromate (K2Cr2O+) are required to prepare a 250-mL solution whose concentration is 2.16M?
159 g
84
Sound travels fastest
Steel at 70°F
85
What is the ratio of the velocity of light in a vacuum to its velocity in another material?
Refractive Index
86
What is the angle of refraction of light as a beam of parallel light enters a block of ice at angle of incidence of 25 deg.? Consider the index of refraction of ice 1.31 and air is 1.00.
18.82 deg.
87
Which of the following factors will affect the hardenability of steel?
I. Composition III. Lattice structure
II. Grain size IV. Cooling rate
I and II
88
One of the main differences between cast iron and steel is that:
Steel has a lower carbon content
89
Yellow brass contains approximately how many percent of zinc
30%
90
__________ are conductors used on high voltage transmission lines, when in order to reduce corona loss, it is desirable to increase the outside diameter without increasing the area beyond that needed for maximum line economy.
Hollow expanded
91
Which of the following is not a type a crystalline lattice imperfection?
Diffusion
92
What is the true complement of (25) base 8?
53
93
The binary coding scherne most common used in microcomputers is
ASCII
94
It refers to the rate at which data is sent over communication lines
Baud rate
95
What refers to the value of an intangible item which arises from the exclusive right of a company to provide a specified product and service in a certain region of the country?
Franchise value
96
A type of bond where the corporation pledges securities which it owns such as the stocks or bonds on one of its subsidiaries.
Collateral trust bond
97
An ammeter has a selling price of P500, If it's selling price is expected to decline at a rate of 10% per annum due to obsolescence, what will be its selling price after 7 yrs
P239.15
98
A plant erected to manufactured socks has a first cost of P10.000 with an estimated Salvage value of P100,000 at the end of 25 years. Find its appraised value to the nearest P 100 by the sinking fund Method, assuming an interest rate of 6% at end to 10 years?
P7,621,597.91
99
in Sec. 35 of R.A. 7920: The practice of electrical engineering is a professional service admission to which is based on and personal qualification. Hence, no firm or corporation may be registered or licensed as such for the practice of electrical engineering.
individual
100
The applicant of Professional Electrical Engineer must submit how many certifications from different Professional Electrical Engineers to effect that the experience record of the applicant is factual and the technical paper submitted was actually prepared by the applicant?
3
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32問 • 1年前問題一覧
1
Which one of the following is NOT a scalar quantity?
Displacement
2
Find the resultant of the coplanar forces 80 lbs at - 30deg . and 60 lbs at 60 deg.
100 lbs at 6.87 deg
3
What prefix refers to 10 to the negative 18th, power?
atto
4
Suppose that the first half of the distance between two points is covered at a speed V = 15 mph and that during the second half the speed is V2 = 45 mph. What is the average speed for the entire trip
22.5 mph
5
A boy leaning over a railway bridge 50 ft high sees a train approaching with uniform speed and attempts to drop a stone down a funnel. He releases the stone when the engine is 80 ft away from the bridge and sees the stone hit the ground 2 ft in front of the engine. What is the speed of the train in mph?
30.2
6
A balloon is ascending at the rate of 12 kph and is being carried horizontally by a wind at 22 kph. If the bomb is dropped from the balloon such that it takes 9 sec to reach the ground, what is the balloon's altitude when the bomb was released?
367.3 m
7
A body weighing 40 lbs, starts from rest and slides down a plane af an angle of 30" with the horizontal for which the coefficient of friction 0.3. How far it moved afler 3 sec
34.81 ft
8
A 120-kg man jumps into a swimming pool from a height of 6 m. It takes 0.4 sec for the water to reduce his velocity to zero. What average force did the water exerts on the man?
-3255 N
9
A 2 kg block of wood rests on a long tabletop. A 5 g bullet moving horizontally with a speed of 150 m/sec is shot into the block and sticks in it. The block then slides 270 cm along the table and stops. Find the speed of the block just after impact
0.374 m/sec
10
What is the force required to punch a 20 mm circular hole through a plate of 25 mm thick steel? Ultimate shear strength of the plate is 350 MPa
549.8 kN
11
A cylindrical water tank is 5 m in diameter and 10 m high. If the tank is to be completely filed determine the minimum thickness of the tank plating if the stress is limiled to 44 MPa
5.57 mm
12
Which of the following is NOT a method by which a single lap rivet joint usually fails?
The rivets fail in tension
13
A welded steel cylindrical drum made of a 10-mm plate has an internal diameter of 1.20 m. Compute the change in diameter that would be caused by an internal pressure of 1.4 MPa. Assume that Poisson's ratio is 0.30 and E = 200 GPa
0.428 mm
14
A solid aluminum shaft of 100-mm diameter fits concentrically in a hollow sleel tube. Determine the minimum internal diameter of the steel tube so that the contact pressure exists when the aluminum shaft carries an axial load compressive load of 750 kN. Assume Poisson's ratio of 0.30 and modulus of elasticity of aluminum to be 70 GPa.
100.04093 mm
15
A cylindrical steel shaft 100 mm in diameter and 2 to a tensile load of 25 kN, with poisson ratio of 0.25. What is the change in volume of this shaft? Take Modulus ofelasticity 200 GPa.
-0.125 cu.cm
16
What torque should be applied to the end of the hallow steel shaft im long having inside and outside diameter of 30 mm and 50 mm respectively in order to produce a twist of 1.5 degrees ? Use G = 80 GPa for shear modulus of steel.
1,110 N-m
17
A cylindrical tank contains off ond water What is the total pressure eat the bottorn of the tank? Consider height of water nd the tank 2.14 m, while that of the oil (sp gr = 0.8) is 0.91m.
28.14 kPa
18
Convert 1200 gallon per minute to liters per mirtute.
4542
19
A horizontal pipe has a constriction in it. At point 1 the diameter is 6 cm, v_{1} = 2 m/sec, p. 180 kPa, while at point 2 the diameter is 2 cm. Find ps
20 kPa
20
Which of the following ratios describes Reynolds number?
Internal foces / Viscous forces
21
Air at pressure of 14.7 psia is pumped into a tank whose volume is 40.5 ft³. What volume of air must be pumped in to make the gage reads 55.3 psi. if the temperature is raised from 70 to 80°F in the process?
189.3 ft^3
22
Find the internal energy of the system if it absorbs 300 cal of heat and at the same time 420 J of work is done on it.
1676 J
23
A cylinder containing ges at 27°C is divided into two parts of equal volume, each of 100 cm, and at equal pressure, by a piston of cross-sectional area 15 cm³. The gas in one part is raised in temperature to 100°C, the other volume is maintained at the original temperature. The piston and walls are perfect insulators. How far will the piston move during the change in temperature
0.723 cm
24
What is the formula for baking sodis (sodium bicarbonate)?
NaHCO3
25
Helium (R=0.4968 BTU/lbm-"F) is compressed isothermally from 14.7 psia and 68°F. The compression ratio is 4. Calculate the work done by the gas
-364 BTU/lbm
26
Pure water is bolling in an open pan at atmospheric pressure. Salt at a temperature equal to that of the boiling water is added. Immediately after the salt dissolves, which of the following will most likely occurs?
the boiling ceases
27
What is the empirical formula for Magnesium Nitrate?
Mg(NO3)2
28
When a system is in equilibrium (not changing with time) but is susceptible to fall into lower-energy states with only slight interaction is called
Metastable stats
29
Zinc sulfide is burned in air to form zinc oxide and sulfur dioxide. What is the balanced equation of reaction?
2ZnS + 3O2 -> 2ZnO + 2SO2
30
A gaseous mixture consists of 2 kg of oxygen, 5 kg of nitrogen and 3 kg of xenon. What is the mole fraction of oxygen gas? Given MW of oxygen, nitrogen, and xenon 32, 28 and 131.3 respectively.
23.7%
31
Steels that are used for drills, cutting tools, and knives are known as
High carbon
32
A solution containing 4.50 g of a non-electrolyte dissolved in 125 g of water freezes at -0.372°C. What is the approximate molecular weight of the solute?
180 g/mol
33
Which of the following does a catalyst change?
the activation energy of a reaction
34
How many closest neighbors does BCC (body centered cubic) atom have?
8
35
In molecules of the same composition, what are variations of atomic arrangements known as?
isomers
36
What energy a photon of blue light have if its wavelenght is 4500 angstrom (A)?
4.42 x 10^-19 J
37
What is the average kinetic energy of the molecules of any gas at 100°C
7.72 x10^-21 Joule
38
A lamp is suspended from a high ceiling with a cord 12 ft long. Find its period of oscillation.
3.85 sec
39
A certain sodium lamp emits 4.45 x10 photons of yellow light per sec. The wavelength of yellow light is 589 nm. What is the radiated power of this lamp?
150 watts
40
A double convex lens has faces of radii 21 and 23 cm. When an object is 25 cm from the lens, a real image is formed 40 cm from the lens. What is refractive Index of the lens material?
1.71
41
When a source of sound is moving with respect to an observer or an observer is moving with respect to the source, the pitch of sound heard by the observer is different from the pitch heard when the source and observer are both at rest. What do you call this change in frequency caused by the motion?
Doppler effect
42
What is the measure of the lumen output per watt input produced by the light source? Of 2 diff. metals
efficacy
43
What is the binary equivalent of the decimal number 2010.47656267
011111011010.0111010
44
Convert (ABC.DEF)18 to (N)
101010111100.11011
45
Which of the following is not required to connect to the internet
Security code
46
RS 232-c is a type of
Interface standard
47
An area of memory that holds the ASCII characters that are being displayed on a monitor is called
screen image
48
What refers to the residual value of a company's assets after all outside abilities (shareholders excluded) have been allowed for?
Equity
49
If P1,000 becomes P1,811.36 terrs when invested at an unknomal rate off interest compounded bimonthly (every 2 months), determine the unknown nominal rate of interest.
12%
50
How much will an investment P1,000,000 earn in 20 yrs compounded annually with an Interest rate 6.5%?
P3,523,645.10
51
A 100 million pounds per year cement plant costs P10,000,000 to built. If the cement sells for 25 cents per pound, what is the return on investment for this plant? Profit after taxes is 10%. Assume that working capital is 25% of fixed capital
20%
52
A machine has an initial cost of P50,000 and a scrap value of P10,000 after 10 years. Find the book value after 5 years using straight line depreciation
P30,000
53
A sinking fund depreciation of P5000, and a capital cost of P100,000 with no final value at the end of 15 yrs, What is the interest rate?
3.77%
54
Sec. 14 (b) (il) states that: Persons in charge of or supervising the operation, lending and maintenance of an electric generating set for private use employing voltages not exceeding 250 Volts and 50 kVA, Provided, that the owner or operator shall be required to have the electric generating set periodically inspected at intervals of not more than by a PEE. an REE on a national, city provincial or municipal government authority exercising jurisdiction over electrical installations.
1 year
55
Appliances fastened in place, connected to branch circuit with other loads shall not exceed __________ percent of the branch circuit rating
50
56
For ranges of 8.75 kW or more in rating, the minimum branch circuit rating shall be:
40 Amp
57
Which of the following electrodes must be supplemented by an additional electrode?
metal ungrounded water pipe
58
Calculate total load current for a 1-phase, 230 Volt branch circuit supplying two-3kW and Using Table 2.20.3.16 (column18) pp. 103 two-4kW wall-mounted oven
42.2 Amp
59
The load for household electric clothes dryers in a dwelling unit(s) shall be either _____ VA or the name plate rating, whichever is larger for each dryer served.
5,000
60
If a live conductor is contacted accidentally, the severity of the electrical shock is determined primarily by:
the contact resistance
61
What is the best definition of velocity?
The derivative of position with respect to time
62
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 6 ft/sec/sec. At the same instant a truck, traveling with a constant velocity of 30 ft/sec overtakes and passes the automobile. How far beyond its starting point will the automobile overtake the truck?
300 ft
63
A 100 kg weight rests on a 30 degree inclined plane. Neglecting friction how much pull must one exert to bring the weight up the plane
50 kg
64
Newton's first law of motion says:
The momentum of a particle remains unchanged in the absence of unbalanced forces
65
An advertisement claims that a certain 1200 kg car can accelerate from rest to a speed of 25 m/sec in a time 8 sec. What average power must the motor produced in order to cause this acceleration? Ignore friction losses.
63 hp
66
Definition of Strain:
deformation per unit length
67
The mathematical statement between stress and strain is
Hooke's Law
68
A steel rod having a cross-sectional area of 300 mm² and a length of 150 m is suspended vertically from one end. It supports a load of 20 kN at the lower end. If the unit mass of steel is 7850 kg/m³ and E = 200 GPa, Find the elongation of the rod
54.44 mm
69
A steel cylindrical tank weighs 35 kg with sp.gr of 7.87 contains a 4 Liter of liquid with density of 997 kg/m³. What is the total mass of the tank?
39 kg
70
Convert a pressure head of 24 inches of mercury to feet of oil sp.gr. of 0.75
36.2
71
What refers to the formation for Collapse of small bubbles of vapors in liquid which caused by combination of reduced pressure and Increased velocity in the fluid?
Cavitation
72
A horizontal air duct reduces in cross sectional area from 0.75 ft² to 0.20 ft. Assuming no losses, what pressure change will occur when 1.5 lb/sec of air flows? Assuming sp. wt. of 0.20 lb/ft³ for pressure and temperature conditions involve.
0.0282 psi
73
When is a floating object stable?
When the center of buoyancy is above the center of gravity
74
The Froude number is a ratio
proportional to the velocity divided by the square root of the characteristics dimension
75
What are the changes in internal energy for reversible adiabatic and isothermal process respectively?
CvΔT and 0
76
Two gases occupies two containers, A and B. The gas in A, of volume 0.12 m³, exerts a pressure of 1.28 MPa. The gas in B, of volume 0. 18 m²³, exerts a pressure of 0.70 MPa. The two containers are united by a tube of negligible volume and the gases are allowed to intermingle. What is the final pressure in the container if the temperature remains constant?
0.932 MPa
77
A tank contains 3 cubic feet of 120 psig air at 80°F. How many tires of volume 1.2 ft³ can be inflated to 28 psig at 80°F?
5.0 complete tires
78
A 5-gim bullet is propelled by a powder charge producing 500 cat of usable energy. What Is the bullet muzzle velocity? Neglect all frictional losses.
915.4 m/sec
79
A 48- wall has an average thermal conductivity of 1.2 BTU-RUM F-hr. If the temperature difference between the two sides is 18°F and the thickness is 0.7 ft. what is the total heat loss lin 5 hours?
7400 BTU
80
What is the formula of a compound with the following gravimetric analysis? Oxygen 13.7%, Hydrogen 5,1%, Carbon = 20.5%, Chlorine = 60.7%
C₂H₂OCl2
81
Which of the following is the formula for acetic acid?
CH3COOH
82
When 10.0 g of silicon dust, Si, is exploded with 100.0g of Oxygen O2. forming silicon dioxide, SiO₂ How many grams of Oxygen remain uncombined? The reaction of the equation is:
SiO2 SIO2. The MW of Si 28, MW of O2 = 32
68.5 gr
83
How many grams of potassium dichromate (K2Cr2O+) are required to prepare a 250-mL solution whose concentration is 2.16M?
159 g
84
Sound travels fastest
Steel at 70°F
85
What is the ratio of the velocity of light in a vacuum to its velocity in another material?
Refractive Index
86
What is the angle of refraction of light as a beam of parallel light enters a block of ice at angle of incidence of 25 deg.? Consider the index of refraction of ice 1.31 and air is 1.00.
18.82 deg.
87
Which of the following factors will affect the hardenability of steel?
I. Composition III. Lattice structure
II. Grain size IV. Cooling rate
I and II
88
One of the main differences between cast iron and steel is that:
Steel has a lower carbon content
89
Yellow brass contains approximately how many percent of zinc
30%
90
__________ are conductors used on high voltage transmission lines, when in order to reduce corona loss, it is desirable to increase the outside diameter without increasing the area beyond that needed for maximum line economy.
Hollow expanded
91
Which of the following is not a type a crystalline lattice imperfection?
Diffusion
92
What is the true complement of (25) base 8?
53
93
The binary coding scherne most common used in microcomputers is
ASCII
94
It refers to the rate at which data is sent over communication lines
Baud rate
95
What refers to the value of an intangible item which arises from the exclusive right of a company to provide a specified product and service in a certain region of the country?
Franchise value
96
A type of bond where the corporation pledges securities which it owns such as the stocks or bonds on one of its subsidiaries.
Collateral trust bond
97
An ammeter has a selling price of P500, If it's selling price is expected to decline at a rate of 10% per annum due to obsolescence, what will be its selling price after 7 yrs
P239.15
98
A plant erected to manufactured socks has a first cost of P10.000 with an estimated Salvage value of P100,000 at the end of 25 years. Find its appraised value to the nearest P 100 by the sinking fund Method, assuming an interest rate of 6% at end to 10 years?
P7,621,597.91
99
in Sec. 35 of R.A. 7920: The practice of electrical engineering is a professional service admission to which is based on and personal qualification. Hence, no firm or corporation may be registered or licensed as such for the practice of electrical engineering.
individual
100
The applicant of Professional Electrical Engineer must submit how many certifications from different Professional Electrical Engineers to effect that the experience record of the applicant is factual and the technical paper submitted was actually prepared by the applicant?
3