This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The diaphragms of a diaphragm type of valve are made of: 1. steel. 2. copper. 3. aluminum. 4. ... (Read 67 times)

lindiwe

  • Hero Member
  • *****
  • Posts: 577
on: Jul 16, 2018
The diaphragms of a diaphragm type of valve are made of: 1. steel. 2. copper. 3. aluminum. 4. chrome-molybdenum.
 
  a. 2 c. 3 and 4
  b. 2 and 3 d. 1 and 2

Question 2

Which type of valve operates on the principle that as the pressure in a cylinder increases, the temperature of the gas increases?
 
  a. Direct-acting valves c. Rupture-disk pres-sure-relief valves
  b. Fusible-plug pres-sure-relief valves d. Spring-loaded pressure-relief valves


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

SamMuagrove

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
The diaphragm type of valve has two diaphragms, one made of steel and one made of copper. Aluminum and chrome-molybdenum are metals that are used in the construction of cylinders.

Answer to Question 2

ANS: B
Fusible-plug pressure-relief valves operate on the principle that as the pressure in a tank increases, the temperature of the gas increases, causing the plug to melt. Spring-loaded devices are de-signed to release excessive cylinder pressure and reseal, preventing further release of gas from the cylinder after the cause of the excessive pressure is removed. The rupture-disk will buckle when the pressure inside the cylinder exceeds a certain predetermined limit. Direct-acting valves are not pressure-relief valves; instead, they are controlling devices that seal the contents of a com-pressed cylinder until it is ready for use.


lindiwe

  • Member
  • Posts: 577
Reply 2 on: Jul 16, 2018
Excellent

Sarahjh

  • Member
  • Posts: 370
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Walrus tusk engraving made by Chukchi artisans depicting polar bears attacking walruses. On display Walrus tusk engraving made by Chukchi artisans depicting polar bears attacking walruses. On display
A hair is an array of many α-keratin filaments, made up of the substructures A hair is an array of many α-keratin filaments, made up of the substructures
Air flows through the PCV valve during acceleration and when the engine is under a heavy load. Air flows through the PCV valve during acceleration and when the engine is under a heavy load.
Connections of a nitric acid plant, intermediate pressure type Connections of a nitric acid plant, intermediate pressure type
A valve corroded by nitric acid. Hazardous materials releases are often caused by using incompatible ... A valve corroded by nitric acid. Hazardous materials releases are often caused by using incompatible ...
Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus). Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus).
Video: Structures that affect circulation - arterioles and vasomotor responses and venous return

For a complete list of videos, visit our video library