PLUMBING ARITHMETIC 2

The temperature at which water has the highest density.

a.32°F

b. 0°C

c. 39.2°F

d. 96.8°F

c. 39.2°F

1 cal = _______ Joule

a. 4.184

b. 4184

c. 3.966

d. 3966

a. 4.184

A 580-ft wide river is spanned by a bridge. The bridge constructed across the river banked 1/7 of its length in the east and 1/6 in the west. What is the length of the bridge?

a. 760 ft

b. 910 ft

c. 1000 ft

d. 840 ft

d. 840 ft

What is the pound per square inch pressure at the bottom of a tank, if the water level is 28 inches?

a.1.32 psi

b. 1.08 psi

c. 1.01 psi

d. 1.12 psi

c. 1.01 psi

Find the total dynamic head if the elevation head is 13ft, the friction head loss is 3ft, and the maximum operating pressure is 14psi.

a. 42.34 ft

b. 48.34 ft

c. 30.92 ft

d. 52.09 ft

b. 48.34 ft

A 10'“ radius pipe has a flow rate of 962 gpm. What is the flow velocity in feet per second?

a. 0.98 ft/sec

b. 1.22 dt/sec

c. 1.56 ft/sec

d. 0.54 ft/sec

a. 0.98 ft/sec

If a pipe with a radius of 5” and length of 350 ft, how many minutes will it take to flush the line at 25gmp?

a. 46.11 min

b. 57.11 min

c. 78.11 min

d. 89.11 min

b. 57.11 min

A vendor bought Php 360 worth of crates. 4 crates are rotten so she throw them away. She sold the rest of the crates for Php 2 interest and gained Php 88. Orginally, how many are the crates?

a. 70

b. 65

c. 60

d. 55

c. 60

A market whereby there is only one buyer of an item for which there are no goods substitute.

a. Monopoly

b. Monopsony

c. Oligopoly

d. Oligopsony

b. Monopsony

Mara’s commission rate is 5% per sale. How much commission does she get if she is able to close 4 sales worth Php 18,000 each.

a. 4600

b. 900

c. 3600

d. 360

c. 3600

A house cost 2,650,000 after being discounted at 5%. What is the original cost of the house?

a. 2,879,565.59

b. 2,789,473.68

c. 2,384,484.87

d. 2,787,334.45

b. 2,789,473.68

The type of bond where the corporation’s owner name is recorded and the interest is paid periodically to the owners.

a. Preferred Bond

b. Collateral Trust

c. Registered Bond

d. Bail Bond

c. Registered Bond

Tyler sold 100 books. The firs 80 books gained profit of 30%. The rest was sold with a discount of 20%. What is the average profit or loss?

a. 7%

b. 17.5%

c. 20%

d. 10%

c. 20%

A man bought Php 20 worth of candies and wishes to sell it. At what price should he mark it if he wishes to give a 40% discount and make 50% profit on the cost?

a. 25

b. 50

c. 60

d. 45

b. 50

A series of regular payments made at the end of each period, such as monthly or quarterly

a. Annuity due

b. Ordinary Annuity

c. Deferred Annuity

d. Perpetuity Annuity

b. Ordinary Annuity

The present worth of all depreciation over the economic life of the item is called _____.

a. Balance Sheet

b. Depreciation Recovery

c. Operation and maintenance expense

d. Capital expenditures

b. Depreciation Recovery

Deliberate lowering of the price of a nation’s currency in terms of the accepted standards.

a. Depreciation

b. Devaluation

c. Inflation

d. Bankruptcy

b. Devaluation

The required output level for a company’s sales to equal its total costs.

a. Break even point

b. Depreciation

c. Bankruptcy

d. Cash flow

a. Break even point

What is the simple interest on a principal of Php6,500 invested at an interest rate of 9% for six months?

a. 255.80

b. 260.53

c. 292.50

d. 272.54

c. 292.50

A man’s savings of 50,000 amounts to 70,000 in 3 years at the rate of simple interest. What is the rate of interest?

a. 15.55%

b. 14.44%

c. 13.33%

d. 12.22%

c. 13.33%

Anna borrowed Php 56,000 from Jes with 15% interest per annum, what is the total amount to be repaid at the end of one year?

a. 53600

b. 64400

c. 56200

d. 56300

b. 64400

Find the accumulated amount of Php 10,000 after 5 years when deposited in a bank at a rate of 12% compounded monthly.

a. Php 24,533.68

b. Php 17,568.70

c. Php 19,543.48

d. Php 18,166.97

d. Php 18,166.97

What will be the amount after 5 years if Php 67,000 is invested at 3% compounded monthly?

a. 76,895.25

b. 75,652.25

c. 77,828.32

d. 77,050.10

c. 77,828.32

Find the nominal rate which if converted semi-annually could be used instead of 11.55% compounded quarterly?

a. 11.62%

b. 11.39%

c. 11.92%

d. 11.72%

d. 11.72%

If a certain fund earns an interest of 12% compounded quarterly, what is the effective rate of interest?

a. 12.48%

b. 12%

c. 12.09%

d. 12.55%

d. 12.55%

Find the final amount after 8 years if an amount of Php 36,000 is deposited in a bank paying an annual interest of 12% compounded continuously.

a. Php 94,021.07

b. Php 83,389.21

c. Php 80,119.87

d. Php 74,426.22

a. Php 94,021.07

How many years will it take to double your money if you invest it at 2.5% compound interest?

a. 32 years

b. 24 years

c. 28 years

d. 18 years

c. 28 years

5200J of heat energy is applied to a 100 g sample of water initially at 37°C. What is the final temperature of water?

a. 49.42°C

b. 45.26°C

c. 46.63°C

d. 47.85°C

a. 49.42°C

The amount of heat required to change ice to liquid water.

a. 334 J/g

b. 184 J/g

c. 155 J/g

d. 144 J/g

a. 334 J/g

Section A of the pipe is 0.07 sq. m, wherein the water flow is 5 m/s . If the area is reduced to half in Section B, what will be the new flow in Section B?

a. 8 m/s

b. 9 m/s

c. 10 m/s

d. 11 m/s

c. 10 m/s

The tendency of a body to float or to rise when submerged to fluid.

a. Buoyancy

b. Fluid Density

c. Pascal’s Law

d. Viscosity

a. Buoyancy

The average bicycle velocity is 15mph. Approximately how many feet can it travel in 5hrs and 25mins?

a. 79,200 feet

b. 396,000 feet

c. 435,000 feet

d. 429,000 feet

d. 429,000 feet

Car A drives 231 km in exactly the same time as Car B drives 308 km. If Car B’s rate exceeded that of Car A by 13kph, determine the rate of Car B.

a. 52 kph

b. 38 kph

c. 65 kph

d. 59 kph

a. 52 kph

Two motorists start out from two towns 420 km apart and travel toward each other at the hourly rate of 30 and 40 km respectively. In how many hours will they meet?

a. 4

b. 5

c. 6

d. 7

c. 6

The boat travels downstream in 2/3 the time as it does going upstream. If the velocity of the river current is 8kph, determine the velocity of the boat in still water.

a. 55 kph

b. 50 kph

c. 3 kph

d. 40 kph

d. 40 kph

Joey and Natasha start from the same point and walk in opposite directions. Joey walks 2km/h faster than Natasha. After 3 hours they are 3p km/h apart. How fast did each walk?

a. 5 kph; 7 kph

b. 8 kph; 10 kph

c. 4 kph; 6 pkph

d. 9 kph; 11 kph

c. 4 kph; 6 pkph

A bus leaves from Manila at 12 NN from Baguio 250 km away, traveling an average of 55 kph. At the same time another bus leaves Baguio for Manila traveling 65 kph. At what distance from Manila they will meet?

a. 119.67 km

b. 114.58 km

c. 183.2 km

d. 133.43 km

b. 114.58 km

An object accelerates from 5 m/s at a constant rate of 7.8 m/s². What is the speed of the object 10 seconds later?

a. 83 m/s

b. 96 m/s

c. 79 m/s

d. 86 m/s

a. 83 m/s

A scooter accelerates from rest to 8 m/s over a distance of 25 m. Determine the acceleration.

a. 3.2 m.s²

b. 1.28 m/s²

c. 2.54 m/s²

d. 3.21 m/s²

b. 1.28 m/s²

A coin is tossed into a well and hits the water 2.14s after. Determine the elevation of well from base ground.

a. -18.56 m

b. -19.67 m

c. -22.86 m

d. -22.44 m

d. -22.44 m

A car travels from rest to a speed of 40 kph, and stops after 7 kilometers. Determine the time covered.

a. 0.30 hours

b. 0.35 hours

c. 0.40 hours

d. 0.50 hours

b. 0.35 hours

A shot is fired at an angle of 45 degrees with the horizontal and a velocity of 300 fps. Calculate, to the nearest, the range of the projectile.

a. 932 yards

b. 293 yards

c. 392 yards

d. 329 yards

a. 932 yards

A gun is fired at a velocity 24 m/s with the horizontal at an angle of 35°. How long will it take for the bullet to reach the ground?

a. 3.87 s

b. 5.24 s

c. 3.56 s

d. 2.81 s

d. 2.81 s

A force of 500 kN acts on the east direction, and another force of 350 kN acts on North direction 55 degrees from X-axis. Determine the resultant.

a. 685.55

b. 757.13

c. 690.52

d. 450.80

b. 757.13

Two forces act on a single point. Force A’s magnitude is 18N on a true bearing of 15 degrees, while force B’s magnitude is 67 N on a true bearing of 80 degrees. Find the direction of the resultant from horizontal axis.

a. 5.93°

b. 25.54°

c. 82.52°

d. 22.33°

d. 22.33°

Calc: Complex mode

Input force > angle symbol > plus another force> angle symbol > equals> apps> 1

An apartment needs to be supplied 30000 gallons per day. The highest level is at 30 feet. What is the number of horsepower required?

a. 0.13 hp

b. 0.16 hp

c. 0.52 hp

d. 0.34 hp

b. 0.16 hp

An irrigator is pumping 5 hp with a total lift of 140 feet. How much gallons can it serve in a day?

a. 375,120.34

b. 265,956.52

c. 203,494.34

d. 231,521.52

c. 203,494.34

The water horsepower output of a pump is 8.6 hp. The shaft of motor has 9.5 hp. What is the pump efficiency?

a. 90.52%

b. 87.86%

c. 68.89%

d. 97.41%

a. 90.52%

A city of 25,000 used 15 gal of water per capita per day. If it’s required to raise this water 150 ft, what is the number of horsepower required?

a. 9 hp

b. 10 hp

c. 11 hp

d. 12 hp

b. 10 hp

How much kW is required for a pump with 400 gpm flow serving a differential pressure of 43.29 psi?

a. 6.56 kW

b. 7.54 kW

c. 8.67 kW

d. 10.10 kW

b. 7.54 kW

A pump has a capacity of 7000 gpm and lifts wastewater against a total head of 20 feet. If the pump efficiency is 90%, what size of motor in kW is required?

a. 85.22 kW

b. 42.78 kW

c. 29.30 kW

d. 39.28 kW

c. 29.30 kW

A centrifugal pump delivers 1980 liters per minute against a head of 300 feet with a combined pump and motor efficiency 70%. What is the cost of the electrical power required to operate the pump 12 hours per day for 2 months? Assume each month has 31 days. The electrical cost is $0.06 per kWh.

a. $ 1,686

b. $ 1,885

c. $ 1,804

d. $1,729

b. $ 1,885