CFESA Steam and Water Systems 2

Question 1

A solenoid valve on a commercial steamer's water fill circuit fails to open. Which symptom would you most likely observe?

Accepted Answer

Generator runs dry and the low-water cutoff shuts down the unit

Answer

Steamer overheats and trips the high-limit thermostat

Answer

Steam pressure rises above the set point

Answer

Steam escapes from the door gasket continuously

Question 2

In a commercial pressurized steamer, what is the typical operating pressure range?

Accepted Answer

5 to 15 PSI

Answer

0.5 to 1 PSI

Answer

25 to 50 PSI

Answer

100 to 150 PSI

Question 3

Water hammer in a commercial steam supply line is caused by:

Accepted Answer

Condensate accumulation that is rapidly displaced by high-velocity steam

Answer

Excessive water hardness clogging the line

Answer

A failed pressure regulator allowing full line pressure into the system

Answer

Incorrect pH of the feed water

Question 4

A water softener used in commercial food equipment service exchanges calcium and magnesium ions for:

Accepted Answer

Sodium or potassium ions

Answer

Hydrogen ions

Answer

Chloride ions

Answer

Bicarbonate ions

Question 5

Which test should a technician perform to verify a pressure relief valve is functioning correctly on a steam boiler?

Accepted Answer

Manually lift the test lever briefly to confirm the valve opens and reseats

Answer

Measure the inlet water flow rate with a flow meter

Answer

Check the valve with a multimeter for continuity

Answer

Apply full supply voltage directly to the valve coil

Question 6

What water quality parameter most directly affects the frequency of descaling maintenance on a commercial steamer?

Accepted Answer

Water hardness (grain per gallon content)

Answer

Water pH

Answer

Water temperature at the point of entry

Answer

Total chlorine concentration

Question 7

A combi oven's steam generator is producing less steam than normal, but the heating element tests good and water is entering the generator. What is the most likely cause?

Accepted Answer

Heavy scale buildup on the heating element is reducing heat transfer efficiency

Answer

The door gasket is allowing steam to escape

Answer

The convection fan motor has failed

Answer

The cooking cavity temperature probe is out of calibration