Description : Which of the following thermocouples is incapable of measuring subzero (i.e., < 0°C) temperature? (A) Chromel-alumel (B) Iron-constantan (C) Platinum-platinum + rhodium (D) Copper-constantan
Last Answer : (C) Platinum-platinum + rhodium
Description : Catalyst used in the oxidation of ammonia is (A) Platinum-beryllium (B) Platinum-rhodium (C) Cobalt-molybdenum (D) Platinum-molybdenum
Last Answer : (B) Platinum-rhodium
Description : Catalyst used in steam reforming of naphtha is (A) Nickel (B) Platinum (C) Silica gel (D) Rhodium
Last Answer : (A) Nickel
Description : ________ is not used as a material of construction in thermocouples. (A) Alumel (B) Rhodium (C) Constantan (D) Duralumin
Last Answer : (D) Duralumin
Description : The following thermocouple may be used for measuring temperature upto 1873°K. (A) Chromel-alumel (B) Copper-constantan (C) Platinum-platinum rhodium (D) Iron-constantan
Last Answer : (C) Platinum-platinum rhodium