Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Calculate Amount of Weight Indicated by the Scale
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Practical Questions > Calculate Amount of Weight Indicated by the Scale

Calculate Amount of Weight Indicated by the Scale

Calculate the amount of weight indicated by the scale as the vessel fills with water until 3 feet of the rod is submerged.

Last updated: December 4, 2020 9:50 am
Editorial Staff
Practical Questions
1 Comment
Share
2 Min Read
SHARE

Calculate the weight of an iron rod (D = 490.68 pounds per cubic foot), 5 feet long and 2 inches in diameter, as it hangs inside an empty vessel: (left side image)

Calculate Amount of Weight

Calculate Amount of Weight Indicated by the Scale

Right side image: Next, calculate the amount of weight indicated by the scale as the vessel fills with water until 3 feet of the rod is submerged.

Hint: the metal rod will be displacing a volume of water 3 feet in length and 2 inches in diameter.

Be sure to show all your mathematical work so that your instructor will be able to check the conceptual validity of your technique(s). A good way to check to see if you’re solving the problem correctly is to check that each and every one of your intermediate calculations (i.e. the results you get mid-way during the process to arrive at the final answer) has real physical meaning.

If you truly understand what you are doing, you will be able to identify the correct unit of measurement for every intermediate result and also be able to show where that number applies to the scenario at hand.

More Questions:

  1. Demonstrate how to estimate numerical answers for this problem without using a calculator.
  2. How would your weight calculations be affected if the rod were made of some material other than iron?
  3. How would your weight calculations be affected if the iron rod were a larger diameter but identical length?
  4. How would your weight calculations be affected if the liquid had a density different from water?

Answer:

Dry weight = 53.52 pounds

Submerged (by 3 feet) weight = 49.44 pounds

Share your answers & explanation with us through the below comments section.

Read Next:

  • Impulse Tubing Leak
  • Control Valve Noise
  • Density and Specific Gravity
  • Pressure Sensing Level Sensor
  • LRV URV of DP Level Transmitter

Credits: Tony R. Kuphaldt

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Programmable Logic Controller (PLC) Questions and Answers – 7
Draw a ladder logic circuit for the electric motor of an air compressor ?
Programmable Logic Controller (PLC) Questions and Answers – 10
Pressure Gauge with Block and Bleed Valves
How Manometer Measures Differential Pressure for Different Fluids?
DP Transmitter Block and Bleed Valves
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • Ahmad says:
    June 10, 2021 at 7:04 pm

    can anyone tell me how to solve the left pic?

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Programmable Logic Controller (PLC) Questions and Answers – 9
Calculate Total Hydrostatic Pressure at Bottom of Vessel
Indentify Faults in Simple Lamp Circuit including Failed Wires
Define Normal Status of a Process Switch ?
Level Measuring Instruments Velocities of Propagation
Determine Resistance value of Resistors
Programmable Logic Controller (PLC) Questions and Answers – 2
Calculate Temperature of RTD

Keep Learning

DP transmitter Elevated 10 Feet above the Vessel

DP transmitter Elevated 10 Feet above the Vessel

Two pressure switches

Identify Two Pressure Switches Logic

Pressure Transmitter Re-Range Questions

Pressure Transmitter Re-Range Questions

Paint Mixing System

Paint Mixing System

Stilling well in liquid level measurement

Stilling Well in Interface Level Measurement System

Calculate Density and Specific Gravity

Calculate Density and Specific Gravity

two chemical streams are mixed together

Practical Process Control System Questions & Answers – 8

Steam flow to the heat exchanger

Analytical Control System of Heat Exchanger Questions

Learn More

Nano Instrumentation Objective Questions

Nano Instrumentation Objective Questions

Facts of Control Valves

Facts About Control Valves

U-tube Manometer unEqual Limb Type

U-tube Manometer with equal & unequal limb types

Moisture Calculator

Moisture Calculator

What is a Tachometer

What is a Tachometer? – Types, Working Principle

RTD with Thermowell

Temperature Sensor Accessories

Distributed Control System Architecture

Control System Architecture

Displacer Level Sensor

What is Displacer Level Sensor ?

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?