Deck 13: Applied Physics Two

Question 1

A man weighing 190 lbs climbs a staircase 35 ft in 25 seconds. Calculate how much work was performed.

A) 2,650 ft pounds of work
B) 4,650 ft pounds of work
C) 6,650 ft pounds of work
D) 8,650 ft pounds of work

Answer 1

6,650 ft pounds of work

Question 2

The energy of motion or velocity.

A) kinetic energy
B) potential energy
C) latent heat of vaporization
D) latent heat of condensation

Answer 2

kinetic energy

Question 3

A rectangular vessel, 10 ft wide, 20 ft long, and 12 ft deep is filled with mercury (density = 13.6 grams per cubic centimeter). Using the following equations: (a) What is the pressure on the bottom of the tank? (b) Identify the average pressure on one side of the vessel. (c) What is the total force on the bottom of the tank? (d) Identify the total force against one end of the tank.
A. P = HD
B.P ave = H ave X D =
C. F = AHD
D. F = AHD ÷ 2 =

A) 163.2 psi, 81.6 psi, 32,640 psi, 16,320 psi
B) 173.2 psi, 71.6 psi, 32,640 psi, 16,320 psi
C) 183.2 psi, 61.6 psi, 32,640 psi, 16,320 psi
D) 193.2 psi, 51.6 psi, 32,640 psi, 16,320 psi

Answer 3

163.2 psi, 81.6 psi, 32,640 psi, 16,320 psi

Question 4

Identified as the quantity of matter.

A) solid
B) mass
C) liquid
D) plasma

Question 5

A method for determining the heaviness of a fluid. The specific gravity of gasoline is 6.15 lb. per gal. ÷ 8.33 = 0.738

A) density
B) baume
C) API
D) specific gravity

Question 6

Calculate the pressure exerted on the bottom of a 69 foot distillation column by a ten foot hydrocarbon level. Specific gravity is .67. Vapor pressure at 240 F is 236. 100 psi is added to the column giving a top gauge reading of ___ psi and a bottom gauge reading of ___ psi?

A) top 236 psi, bottom 238.9 psi
B) top 336 psi, bottom 338.9 psi
C) top 136 psi, bottom 138.9 psi
D) top 36 psi, bottom 38.9 psi

Question 7

The heaviness of a substance while specific gravity compares this heaviness to a standard and then calculates a new ratio. The density of one gallon of water is 8.33 pounds per gallon

A) density
B) baume
C) API
D) specific gravity

Question 8

Standards to measure the heaviness of a hydrocarbon. A specially designed hydrometer; marked in units API is used to determine the heaviness or density of a hydrocarbon.

A) density
B) baume
C) API
D) specific gravity

Question 9

Calculate the pressure produced by a ten foot onion tank, filled with a hydrocarbon fluid. (.72 s.g.) . Vapor pressure 200. Add 45 psi N₂ to total. What is the final pressure?

A) 25.65 psi
B) 2.48.1 psi
C) 4.56 psi
D) 8.89 psi

Question 10

Find the volume of a granite object with a density of 2.6 grams per cc and a weight of 1280 grams.
V= W / D

A) 392 cm³
B) 492 cm³
C) 592 cm³
D) 692 cm³

Question 11

What is the density of a cube of iron, 15 cm on an edge, that weighs 9.6 kg?
D =W / V

A) 2.84 g/cm³
B) 2.34 g/cm²
C) 6.84 g/cm³
D) 0.84 g/cm³

Question 12

How many liters of alcohol will weigh 30 kg? Density of alcohol = 0.8 g/cm3
V= W / D
Note: 1 kilogram = 1000 grams

A) 10.6 liters
B) 23.9 liters
C) 32.5 liters
D) 37.5 liters

Question 13

A beam of cedar wood 20 ft long, 2 foot wide, and six inch thick weighs 150 lb. Calculate its density. Show your work!
D = W÷ V $\quad$ $\quad$ $\quad$ V = LWH

A) 3.2 pounds per cubic ft
B) 4.7 pounds per cubic ft
C) 7.5 pounds per cubic ft
D) 9.5 pounds per cubic ft

Question 14

What will be the weight of a rectangular steel bar 15 ft long, 1 foot wide, 2 inches thick? (Density of steel = 461 lb/ft3) Show your work!
V = LWH
W = DV

A) 1,152.5 pounds
B) 11.52 pounds
C) 115.25 pounds
D) 2006.5 pounds

Question 15

Find the density of helium gas: twenty liters of the gas weighs 3.4grams.
D =W / V

A) 0.17 grams per liter
B) 0.71 grams per liter
C) 1.7 grams per liter
D) 12 grams per liter

Question 16

Calculate the pressure produced by a 2000 pound stone block, 40 " length X 20" Width X 60" Height.

A) 20.5 psi
B) 200 psi
C) 2500 psi
D) 2.5 psi

Question 17

Calculate the pressure produced by a 456 pound granite block, 10" length X 15" Width X 72" Height.

A) 9.05 psi
B) 5.78 psi
C) 3.04 psi
D) 2.54 psi

Question 18

Calculate the pressure produced by a 40 foot onion tank, filled with 17.5 ft of a hydrocarbon fluid. (.54 s.g.) . Vapor pressure 300. Add 15 psi N₂ to total. What is the final pressure?

A) 319.09 psi
B) 31.9 psi
C) 3.19 psi
D) 3190.9

Question 19

The standard used by industrial manufacturers to measure non hydrocarbon heaviness.

A) density
B) baume
C) API
D) specific gravity

Question 20

Calculate the pressure produced by water in a 12.5 foot high vessel.

A) 45.8 psi
B) 6.98 psi
C) 2.54 psi
D) 5.41 psi

Question 21

What pressure, in PSI pounds per square inch, is a scuba diver subjected when he / she descends to an ocean depth of 125 feet?

A) 54.12 psi
B) 64.12 psi
C) 44.12 psi
D) 34.12 psi

Question 22

Causes matter to change and does not have the properties of matter.

A) energy
B) inertia
C) gravity
D) density

Question 23

Calculate the amount of work accomplished by a three foot table holding up a two pound book.

A) 3 ft pounds of work
B) 4 ft pounds of work
C) 5 ft pounds of work
D) 6 ft pounds of work

Question 24

A principle used to explain a bodies ability to resist motion.

A) centrifugal force
B) gravity
C) kinetic energy
D) inertia

Question 25

Calculate the amount of work accomplished when a weight is lifted 240 ft by a force of 600 lbs.

A) 144,000 ft pounds of work
B) 44,000 ft pounds of work
C) 104,000 ft pounds of work
D) 164,000 ft pounds of work

Question 26

Stored energy

A) kinetic energy
B) potential energy
C) latent heat of vaporization
D) latent heat of condensation

Question 27

A cylinder 4 cm in diameter and 40 cm long is made of brass. (Density = 8.5 g/cm3) Calculate its weight. Show your work!
(V= $\pi$ r²h)
W = DV

A) 4.26 grams
B) 250 grams
C) 5,300.5 grams
D) 4,270.4 grams

Question 28

What current in amps, will flow through a conductor with a resistance of 20 ohms if the potential difference is 120 volts? $\quad$ I = V ÷ R

A) 6 amps
B) 12 amps
C) 8 amps
D) 120 voltt

Question 29

An electric motor on a centrifugal pump has a total resistance of 6 ohms. If the motor uses 21 amps of current, what voltage does the motor need?
I = V ÷ ÷ R $\quad$ or $\quad$ V = IR

A) 21 amps
B) 6 ohms
C) 110-120 volts
D) 126 volts

Question 30

Steam enters a turbine at 412ºF at atmospheric pressure. Six hundred pound steam flows through the turbine each hour during normal operation. Formula: Rh = Ws X c X ∆T
Rh = ?
Ws = 600 lbs/hr
c = 0.48
Tin = 412ºF
Tout = 212ºF
∆T = ?

Question 31

On question 31, calculate the HP output.
Formula: HP = (Rh) heat rate X 0.000393
= _______ HP

Question 32

Identify the steam turbine's thermal efficiency.

Question 33

Determine the Thermal Efficiency of the Heat Exchanger

Question 34

A balanced lever arm rests on a fulcrum at its center. A 600-lb force is applied 5 ft from the fulcrum. To maintain equilibrium, how far from the fulcrum, on the other lever arm, should a 1200-lb force be applied?
Solution: