1-48. 1-49. 1-50. 1-51. 1-52. 1-53. Which  of  the  following  devices would be used to protect a cooling system  from  over  pressurization? 1. The  variable  orifice 2. The  pressure  regulator 3. The equipment-flow regulator 4. The  relief  valve What is the function of a typical low-flow  switch? 1. To  indicate  low  coolant  flow 2.  . To  indicate  excessive  coolant flow 3. To  redirect  coolant  flow  to another load 4. To  control  coolant  flow  through the  heat  exchangers In  a  venturi-type  flowmeter,  the flow rate is measured by what process? 1. The  pressure  differential between  the  two  taps 2. The  decreased  coolant  velocity 3. The  turbulence  of  the  coolant 4. The diameter of the throat Which  of  the  following  flowmeters allows  visual  inspection  of  the coolant  for  entrained  air? 1. The  orifice-type 2. The  venturi-type 3. The  purity-type 4. The   rotameter-type Operating a circulating pump with insufficient  coolant  flow  could cause  which  of  the  following malfunctions? 1. The  overheating  of  the  pump only 2. The seizure of the pump only 3. Both 1 and 2 above 4. The  reduction  of  outlet pressure What  percent  of  the  coolant  flows through  the  demineralizer  in  one hour? 1. 100% 2. 50% 3. 20% 4. 5% 1-54. Which of the following demineralizer  components  is  used  to remove  small  particles  from  the coolant? 1. The mixed-bed cartridge 2. The  organic  cartridge 3. The  oxygen  removal  cartridge 4. The  submicron  filter 1-55. Which  of  the  following contaminations  is  least  likely  to occur in a distilled water and ethylene  glycol  coolant  system? 1. Dissolved  oxygen 2. Chlorine 3. Oxidized  metal 4. Bacterial 1-56. Demineralize  performance  and coolant  purity  is  monitored  by measuring  what  property  of  the coolant? 1. Temperature   compensation 2. Conductivity 3. Pressure  differential 4. Resistivity 1-57. Scheduled  maintenance  of  a demineralizer  consists  primarily  of performing  what  preventive  action? 1. Adjusting  the  coolant  flow through  the  system 2. Replacing  the  purity  monitors 3. Replacing  the  filters  and cartridges 4. Calibrating  the  purity  monitors 1-58. Which  of  the  following  contaminates could be considered a source of contamination  for  an  oxygen analyzer  sensor? 1. Electrolyte 2. Oil  from  your  fingers 3. Direct  sunlight 4. Fluorescent  lighting 1-59. What position on an alarm switchboard  is  used  for  alarm acknowledgement? 1. Normal 2. Standby 3. cutout 4. Test 1-60. What  position  on  an  alarm switchboard is used to simulate an alarm  position? 1. Normal 2. Standby 3. Cutout 4. Test 5