Q 14 (a) One gram of uranium will produce energy equivalent to approximately O a. 10 ton of high-grade coal Ob. 100 ton of high-grade coal O c. 4.5 ton of high-grade coal Od 1 ton of high-grade coal (b) The mass number of a substance represents the sum of total number of a. protons and neutrons in an atom b. protons and neutrons in a nucleus c. protons and electrons in an atom d. neutrons and electrons in an atom (c) Consider the following statements: (1) Boilers rated over 500 MW are not necessary super-critical boilers. (2) Power plant boilers are generally once-through boilers. (3) Blow down at regular intervals done to remove solids Of these statements, Oa2 and 3 are correct O b. 1, 2 and 3 are correct Oc. 1 and 2 are correct Od 1 and 3 are re correct (d) In Rankine cycle, the work output from the turbine is given by a. change of enthalpy between inlet and outlet b. change of internal energy between inlet and outlet C. change of entropy between inlet and outlet 89 d. change of temperature between inlet and outlet 100 (e) The control de-superheater of most boilers functions to control a superheated steam temperature Ob. superheater inlet temperature C. superheated steam flow O d. de-superheated steam temperature