4th Class Power Engineering Unit A11: Introduction to Boiler Designs Already Passed

4th Class Power Engineering Unit A11: Introduction to Boiler Designs Already Passed This type of boiler is more tolerant of Class 1 water treatment, because they are more resistant to corrosion: Select one: a. coil type b. fire tube c. cast iron d. water tube c One disadvantage of a firetube boiler is: Select one: a. higher maintenance costs than watertube boilers b. slow response to load changes c. require very high quality feedwater d. slow to bring up to operating pressure and temperature d Tubes used for high pressure boiler service are usually: Select one: a. welded b. rolled c. seamless d. beaded c In this type of sectional cast iron boiler, a single nipple connects two sections: Select one: a. horizontal b. vertical c. atmospheric d. resistance a A disadvantage of watertube boilers in comparison to firetube boilers is: Select one: a. they have poorer water circulation b. they require much higher quality feedwater c. they cannot make superheated steam d. they contain less water at the same steaming capacity b The two general types of electric boilers are the: Select one: a. electrode and immersion b. generator and immersion c. electrode and generator d. electrode and relay a In boiler design, even the weakest component of a boiler must be strong enough to operate at the: Select one: a. MANP b. MASP c. MAWP d. MAXP c Flexible watertube heating boiler tubes are designed for: Select one: a. simple replacement b. maximum flow c. minimum expansion d. turbulent scrubbing a In the jet type electrode boiler, the _________