PRACTICE EXERCISE FOR LESSON 4
You have just finished reading the instructional material for Lesson 4. This lesson covered the use of
the M2 water heater to heat water in the tank and to heat water from a natural water source. It is now
time to check your understanding of the lesson. This is done by completing the practice exercise below.
All of the questions are multiple-choice and are intended to measure your understanding of the
procedures used in performing the task. There is only one correct answer to each question. Try to
answer all of the questions without referring to the lesson material.
When you have completed all of the questions, turn the page and check your answers against the correct
responses. Each correct response is referenced to specific portions of the lesson material so that you can
review any questions you have missed or do not understand. When you have completed your review,
continue to the next lesson.
In starting the M2 water heater, if the heater does not ignite within 10 seconds after placing the
HEATER-ON/PURGE-ON switch in the HEATER-ON/ PURGE ON position, you must NOT
notify organizational maintenance personnel.
make further attempts to start the heater.
place the switch in the OFF position.
remove the electrical power cable.
You are using regular gasoline for fuel in the M2 water heater. After placing the HEATER-
ON/PURGE-ON switch to the HEATER-ON position, you should adjust the temperature selector
valve control to produce an indication of __ psi on the fuel pressure gage.
What is the reason for operating the pump unit for two minutes with the HEATER-ON/PURGE-
ON switch in the PURGE-ON position before igniting the boiler?
To purge the fuel line.
To prime the pump and be sure all liquid is out of the prime-detergent tank.
To ensure the boiler is filled with water and air is out of the line.
To flush air from the heater storage compartment.