A gate valve - Study guides, Class notes & Summaries

Common Hose Materials -Cotton -Nylon -Rayon Vinyl -Poly-mired vinyl -polyester Braided Hose yarn braided over a rubber liner Wrapped Hose fabric or mesh material impregnated with rubber or plastic wrapped around a rubber liner and covered with plastic or rubber Woven Hose rubber liner and one or more woven outer layers Hose Jacket Outer woven layer of a woven hose Hose Coupling Materials Brass alloy Aluminum alloy Magnesium Types of Couplings...

Boilermaker NCCR Test Questions And Answers Boilermaker NCCR Test 1 ft 3-3/4 in + 2 ft 1-1/16 in +5 ft 10- 7/8 in = - ANS 9 ft 3-11/16 in A 1-inch plate is to be cut. Why should an acetylene gerulator on a cutting rig not be adjusted over 15 PSI? - ANS Acetylene is unstable above this pressure A big control valve is pulled who is responsible for the rigging? - ANS Crane operator and rigger A boiler maker must have all of the following wh...

Z-51 Written Exam Questions and Complete Solutions In a steam turbine, what is the function of a Kingsbury thrust bearing? A) Maintain first stage steam pressure. B) Compensate for coupling misalignment. C) Adjust shaft torque at start up. D) Maintain axial positioning of the rotor shaft. - Answer: D) Maintain axial positioning of the rotor shaft. The ratio of actual pressure of water pressure in the atmosphere to the saturated pressure of given temperature is A) partial pressure....

Combined Service Mains -This standard shall apply to ______ intended to carry water for fire service mains AHJ - Working plans shall be submitted for approval to the _____ before any equipment is installed or remodeled. Pressure-Regulating devices - ____ shall not be used Control Valves - ______ shall not be installed in the piping from the fire department connection to the fire service main Control Valves - _____ shall be permitted in the system downstream of the fire department connect...

Pumping Apparatus Driver/Operator Handbook _____ pumps offer the maximum amount of flexibility Auxiliary engine-driven pumps Auxiliary engine-driven pumps used on ARFF apparatus and for trailer mounted applications tend to be large capacity pumps of up to 4,000 gpm or more These auxiliary engine-driven trailer mounts are powered by a full size diesel engines and are capable of _____ horsepower or more 500 horsepower In this arrangement, the pump is driven by a driveshaft that is connected to th...

What lever is used to slide a pilot seat fully AFT? - H Lever What would you do first if a CC becomes incapacitated? - Make the area safe for the incapacitated CC. If the N1 becomes incapacitated before departure, what is the procedure? - - N2 becomes N1, if qualified. - N3 becomes N2. -N4 remains in position. if the N2 becomes incapacitated during the flight what is the procedure? - - N1 remains in position. - N3 becomes N2. - N4 remains in position. CC incapacitated prior to de...

Lowest boiling point of water is at? a. 3000m above the sea level b. Just below sea levelc. at 1000m above sea level d. at 101.3kPa - Answer-a. 3000m above the sea level Efficiency of an electrostatic precipitator is: a. 75% b. 60% c. 90% d. 99.9% - Answer-d. 99% Non-Return stop valves are important in which situations a. when connected in parallel with other boilers b. when boiler trips c. if boiler ruptures d. all of the above - Answer-d. all of the above 4th class power enginee...

API Recommended Practice 574, Inspection of Piping, Tubing Valves, and Fittings, does not cover: a. control valves. b. piping smaller than 2" NPS. c. tubing smaller than 1.5" diameter. d. fittings smaller than 2" NPS - A The refining industry generally uses what type piping for severe service? a. brass b. cast c. seamless d. longitudinal seam welded - C Piping made by rolling plates to size and welding the seams is larger than ______ inches outside diameter. a. 10 b. 16 c. 14...

Backflow Prevention Practice Exam Questions and Answers 2024 Graded A. A backflow preventer creates a closed plumbing system that requires the installation of a(n) _____? A. Expansion tank B. Globe valve C. Pressure reducing valve D. Temperature and pressure relief valve E. Utility box key - ANSWER Expansion tank A barometric loop must be installed 35 ft (10.7 m) above the highest ____? A. Boiler B. Fixture outlet C. Gate valve D. Service connection E. Water meter - ANSWER Fixture ...

which disinfectant would work best against Cryptosporidium (Ans- Ozone The pH of a Water sample Is greater than the PHs so the Langlier index (Ans- indicates the water is scale forming When water high in calcium bicarbonate is softened by ion exchange (Ans- Sodium Bicarbonate remains in the product water A bypass valve would be used with a (Ans- gate valve Where ground frost is expected the riser pipes in a meter pit should be at least how far away from any wall of the meter bo...