Jercel 2012

The temperature of an object is raised by 90 deg C. This is equivalent to an increase in its Fahrenheit scale of

A. 194

B. 130

C. 162

D. 50

.A stone of mass 100 grams is whirled in a horizontal circle at the end of a cord 100 cm long. If the tension in the cord is 2.5 newtons, what is the speed of the stone?

A.3 m/s

B. 4 m/s

C. 5 m/s

D. 6 m/s

The most important element that controls the physical properties of steel is

A. Silicon

B. Tungsten

C. Manganese

D. Carbon

RA 7920 contains how many sections all in all

A. 40

B. 41

C. 43

D. 45

A ball is thrown with an initial velocity of 30 m/sec from a height of 3 m above the ground, and 40 m from a vertical wall. How far from the wall will the ball rebound for the first time?

A. 23.46 m

B. 16.54 m

C. 32.46 m

D. 61.54 m

Accounting book in which are recorded the credits and debits of commercial transactions

A. ledger

C. balance

B. journal

D. clerk’s book

A voltage level exceeding one (1) kV up to 34.5 kV is

A. High Voltage

C. Extra High Voltage

B. Low Voltage

D. Medium Voltage

Which metal is protected by a layer of its own oxide?

A. aluminum

B. silver

C. gold

D. iron

Article III of Code of Ethics for Electrical Engineers contains:

A. SEC. 1 to 8

C. SEC. 1 to 6

B. SEC. 1 to 7

D. SEC. 1 to 5

Varignon's theorem is used to determine the __________.

A. Moment of inertia

C. Location of centroid

B. Mass moment of inertia

D. Moment of area

The minimum size of service drop copper conductors allowed by the PEC is one of the following. Which is this

A. 3.5 sq. mm

C. 2.0 sq. mm

B. 5.5 sq. mm

D. 8.0 sq. mm

A turbine has to operate at 300 rpm under a net head of 400m. If cv = 0.98, what is the velocity?

A.68.82 m/s

C. 34.41m/s

B. 86.82 m/s

D 173.64 m/s

3.Which one of the following elements has the largest atomic radius?

A. lithium

C. beryllium

B. sodium

D. magnesium

A heat pump delivers 20,000 kJ/hr of heat with a 1.39 kW input. Calculate the COP

A. 3

B. 4

C. 5

D. 6

What is the pump power needed to increase the pressure by 600 kPa in a 8-cm-dia pipe transporting0.04 cu. m/s?

A·32kW

B. 24 kW

C. 18 kW

D. 43 kW

The path of a projectile is:

A. A parabola

C. A part of a circle

B. An ellipse

D. A hyperbola

.If a twisting moment of 10,000 lb.-in is impressed 1-¾ in diameter shaft, what is the maximum shearing stress developed?

A. 8,500 psi

B. 9,200 ps

C. 9,500 psi

D. 8,900 psi

Calculate the pressure of oxygen in a mixture at 105.9 kPa containing 0.400 mol of oxygen and 0.200 mol of nitrogen.

A. 176.5 kPa

B. 141.2 kPa

C. 35.2 kPa

D. 70.6 kPa

Determine the moment of inertia of a circle of a diameter 5 in about a diameter.

A. 30.7 in^4

B. 61.4 in^4

C. 15.35 in^4

D. 46.02 in^4

What is the strong bond between hydrogen atoms known as?

A. The iconic bond

C. Ionic and metallic bonds

B. The metallic bond

D. The covalent bond

.A 8.00-L sample of gas at 99.0 kPa and 25 deg C is compressed. What is its final pressure at 25 deg C if the gas is compressed 2.00 L?

A. 396 kPa

B. 132 kPa

C. 264 kPa

D. 528 kPa

The viscosity of a fluid varies with

A. temperature

C. density

B. pressure

D. Temperature and pressure

Calculate the molality of solution containing 0.500 mol of solute in 250 g of solvent.

A. 1.50 m

B.2.00 m

C. 1.75 m

D. 2.25 m

An object 6 cm high is placed 12 cm away from a concave mirror whose focal length is 36 cm. What is the height of the image?

A. 3cm

B. 4cm

C. 9cm

D. 8cm

.Calculate the mass of the oxygen that reacts with 1.24 g of methane (natural gas) to form 3.41 g of carbon dioxide and 2.79 g of water.

A. 4.96 g

B. 4.65 g

C. 7.44 g

D. 1.86 g

Which wave requires a medium for transmission?

A. light

B. infrared

C. radio

D. sound

An 8 unit long pendulum subtends an angle of 34 degrees. What is the height difference from its stationary position?

A. 1.37

B. 1.73

C. 1.26

D. 1.62

200 grams of aluminum block at 400 deg C is dropped into a 1 kg aluminum calorimeter containing 100 grams of water at 5 deg C. What is the final temperature of the mixture, in deg C? Cal= 0.22 kcal/kg-deg C.

A. 25.7

B. 52.7

C. 64.8

D. 46.8

The density of nitrogen is 1.25 kg/cu. M at ST.P. Determine the density of nitrogen at 42 deg C and 730 mm of mercury

A. 1.09 kg/cu. m.

C. 1.04 kg/cu. m.

B. 1.90 kg/cu. m.

D. 1.40 kg/cu. m

.A 80-kg rectangular box open at the top, has base dimensions 1.0 m by 0.8 m and depth 0.50 m. How deep will it sink in fresh water?

A. 0.025 m

B.0.050m

C. 0.075m

D. 0.095 m

Air enters a turbine at 5 kg/s at a velocity of 20 m/s at a temperature of 200 K and exits at a velocity of 500 m/s. What is the power (kW) due to change in kinetic energy?

A. 624

B. 426

C. 836

D. 368

When a submarine dives a depth of 120 m, to how large a total pressure is its exterior surface subjected? The density of seawater is 1.03 g/cc

A. 1.41 MPa

B. 1.21 MPa

C. 1.31 MPa

D. 1.11 MPa

A device used to measure atmospheric pressure is called

A. Manometer

C. Pycnometer

B. Barometer

D. Hydrometer

The sun is directly overhead of the eagle. The eagle dives at 50 m/s at an angle of 30 degrees below the horizontal. What is the velocity of the shadow?

A. 43.3 m/s

B. 34.3 m/s

C. 25.o m/s

D. 52.0 m/s

An impulse of 30 N∙s is applied to a 5-kg mass. If the mass had a speed of 100 m/sec before the impulse, its speed after the impulse could be

A. 250 m/s

B. 106 m/s

C. 6.00 m/s

D. 0 m/s

.It is responsible for the procurement and administration of funds with the view of achieving the objectives of business.

A. Capital

B. Budget

C. Finance

D. Funds

Which is not a standard overcurrent protection device rating?

A. 50

B. 1500

C. 225

D. 110

What is the mass number of an atom with 9 protons, 11 neutrons, and 9 electrons?

A. 9

B. 18

C. 20

D. 29

What is the pH value of a solution with acetic acid concentration of 3.0 x 10^-6 M?

A. 12.72

B. 14.28

C. 5.523

D. 3.472

Which device could be used to determine whether a substance is radioactive

A. a Van de Graaff generator

C. A cyclotron

B. a Geiger counter

D. A linear accelerator

.An electric motor lifts a 10-kg mass 100 m in 10s. The power developed by the motor is

A. 9.8 W

B. 98 W

C. 980 W

D. 9,800 W

What charge has the elements belong to the group 2?

A. 2

B. 1

C. -2

D. -1

Which of the following holds true for any given material?

A. 1/3 ≥ G/E ≥ 1/2

C. 1/3> G/E ≥ 1/2

B. 1/2 > G/E > 1/3

D. 1/2 ≥ G/E ≥ 1/3

Calculate the molarity of a solution after 1.70 L of 2.06 M solution is diluted to 2.50 L.

A. 1.40 M

B. 2.08 M

C. 0.883 M

D. 3.42 M

Maximum distances between busway supports.

A. 1000 mm

B. 1500 mm

C. 1800 mm

D. 2000 mm

A year ago, Dennis invests $900 then a year after he gets an annual return of $1100. What is the interest rate?

A. 11.11%

B. 22.22%

C. 10.55%

D. 12.22%

The external pressure applied to a confined fluid increases the pressure of every point in the fluid by an amount equal to the external pressure. This is known as

A. Pascal's principle

C. Torricelli's Theorem

B. Archimedes principle

D. Bernoulli's Theorem

A man on the moon pushes a 10-kg box using a 100 N-force. What is the acceleration of the box? Assume amoon= 1.67 m/s^2. Ignore

A. 15 m/s^2

B. 20 m/s^2

C. 40 m/s^2

D. 10 m/s^⁶

A soccer player kicks the rock horizontally off a cliff 40m high. Then hears the splash of water 3s after. Find the initial velocity of the rock. Assume the speed of sound = 343m/s

A. 17.89 m/s

B. 9.91 m/s

C. 9.30 m/s

D. 10.56 m/s

A machine cost $75,000 after 1 year. If the rate of interest is 18% compounded annually, what is its price now?

A. $63,955.23

C. $65,933.23

B. $63,559.32

D. $65,339.32

Jercel 2012

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