Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

boiler plant operation > Boiler Plant Math > Flashcards

Boiler Plant Math Flashcards

1
Q

Convert 100℃ to degrees ℉

A

100℃ = 212℉.

100 x 1.8 + 32 = 212

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Convert 32℉ to degrees ℃.

A

32℉ = 0℃.

32 ℉ - 32 ÷ 1.8 = 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What pressure is exerted by a column of water 10 feet high

A

10 feet X .433 = 4.33 psi

10 feet ÷ 2.31 = 4.329 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the area of a 4” (inch) diameter circle

A

A=πr^2

2 x 2=4 x 3.14=12.56 〖in〗^(2 )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the circumference of a 6” (inch) diameter circle

A

6 in × 3.14 = 18.84 in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How many cubic feet in a room with these dimensions: 10 feet long and 8.5 feet wide with a 7 foot ceiling

A

10 × 8.5 × 7= 595 〖ft〗^3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

You are expecting a fuel oil delivery of 6,800 gallons. Your tank holds 10,000 gallons. What is the maximum amount of oil you can have in your tank

A

3,100 gallons is the maximum amount of oil in the tank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

You have a tank with 2,310,000 cubic inches. How much does the water weigh

A

2,310,000 ÷ 231 = 10,000 gallons. 10,000 × 8.33 = 83,300 lbs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A 10,000 gallon tank is half filled with water. How much does the water weigh

A

10,000 × 8.33 = 83,300 lbs.

83,300/2 = 41,650 lbs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Tank dimensions: 10 feet by 10 feet by 10 feet. Tank is filled with water @ 62℉. How much does the water weigh

A 
10 × 10 × 10 = 1000 〖ft〗^3
1000 〖ft〗^3 × 62.5  =  62,500 lbs.
Or
1000 〖ft〗^3 × 7.5  = 7500 gals. 
7500 gals. × 8.33 = 62,475 lbs
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is standard pressure

A

The standard pressure is 14.7 PSIA (14.696)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What device measures absolute pressure

A

A barometer measures absolute pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many BTU’s to turn 1 lb. of water into steam

A

If water is at 212℉ it will take 970.3 btu’s to turn it into steam at 212℉.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

231 cubic inches is equal to how many gallons of water

A

231 〖in〗^3 of water = 1 U.S. gallon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many gallons in 1 cubic foot

A

One cubic foot (1 〖ft〗^3) = 7.5 U.S. gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Standard pressure is equal to how many inches of mercury

A

14.696 psia = 29.92 in hg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

A column of water 2.31 feet high exerts how much pressure at its base

A

A column of 2.31 feet high exerts 1 psi at its base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the area of the head on a boiler drum that is 60in in diameter

A

Πr^2 3.1416 x 900 = 2827.44 sq. in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

A water tube boiler operates at a steam pressure of 750psia, and its steam drum diameter is 60in. What is the total pressure on the head of the drum

A

750psia x 2,827.44 sq. in. = 2,120,580 psia

20
Q

A 600 psia pressure boiler has a drum that is 36in. in diameter. What will be the total pressure on the head

A

600 psia 36”

Pie r^2 3.1416(18)^2= 1017.8784
600 psia x 1017.8784= 610,727.04 psia

21
Q

What is the circumference of a 3” water tube

A

9.42” (Diameter X π)

22
Q

Convert 32℉ to ℃

23
Q

How do you convert ℉ to ℃

A

℃ = (℉ - 32)
___________
1.8

24
Q

How do you convert ℃ to ℉

A

℉ = (℃ X 1.8) + 32

25
Q

How many cubic inches for 10,000 gallons of water

A

2,310,000 〖in〗^3 (10,000 X 231)

26
Q

How much pressure is exerted by column of water 10 feet high?

A

4.33 psi (10 x .433) or (10 ÷ 2.31)

27
Q

How high is a column of water with 1 psi at it’s base

28
Q

How high is a column of water with .433 psi at it’s base

29
Q

You have a 10,000 gallon tank for #6 oil. You are expecting a delivery of 6,800 gallons. What is the maximum amount of oil you can have in your tank prior to delivery

A

< 3,200 gallons

30
Q

A tank is 10 X 10 X 10 is filled with water @ 62°F. How much does water weigh

A

62,500 lbs.

31
Q

How many gallons in one cubic foot

A

7.5 gallons

32
Q

A column of water 10’ HIGH, 2 square feet at base, 62F at base. How much pressure

33
Q

ENGINE HORSEPOWER

A 
P.L.A.N.  
33,000
P = MEAN EFFECTIVE PRESSURE
L = LENGTH OF STROKE
A = AREA OF HP PISTON
N = NUMBER OF STROKES/MIN.
SIMPLE ENGINE = 40 PSI, CONDENSING ENGINE = 50 PSI
COMPOUND ENGINE = 70 PSI VARIABLE SPEED USE AVERAGE SPEED
34
Q

BTU BOILER HORSEPOWER

A

970.3 X 34.5 = 33,475

35
Q

BTU MECHANICAL HP HOUR

A

1,980,000 / 778 = 2,545

36
Q

BTU KILOWATT HOUR

A

2545 /.746 = 3,413

37
Q

ONE KILOWATT

A

1.34 HP (1000/746)

38
Q

ONE BTU

A

778 FT/LBS. OF WORK

39
Q

Pump calculations

A

Theoretical HP = Q X 8.33 XH X Sp.Gr. / 33,000

Required HP = Q X 8.33 X H X Sp.Gr. / 33,000 X Ep

KW Input = Q X 8.33 X H X Sp.Gr. / 33,000 X Ep X Em X 1.341

Q = Capacity
H = Head (ft)
Sp.Gr. = Specific Gravity
Ep = Pump efficiency (%)
Em = Motor efficiency (%)
40
Q

How much does a gallon of water weigh

41
Q

Density of water

A

62.5 lbs/cu ft

42
Q

What is the volume of 1 us gallon of water

A

231 cubic inches

43
Q

HP in a KW

A

1.341 KW = 1 HP

44
Q

How many foot pounds per minute in a HP

A

33,000 ft/lbs per minute

45
Q

Capacity for a reciprocating pump (piston pump)

A 
L.A.N.E. / 231
L = Length of stroke
A = Area of the piston
N = Number of strokes
E = Efficiency (slip)
 length of stroke (inches)
 Area of piston (square inches)
 Stroke (minutes)
 Efficiency (slip) as %
 231 Cubic inches per us gallon

boiler plant operation (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions