Assessment: Reefer Unit Maintenance

Legislation and Environment

Legislation and Environment

In this lesson, you’ll learn about how refrigerants should be handled so you to abide by the law and take care of the environment.

0%
Introduction to Reefer Unit Maintenance 2 minutes
Greenhouse Gases and the Environment 6 minutes

Health and Safety

Health and Safety

In this lesson, you’ll know how to store and safely handle cylinders, how to prevent incidents from happening, and what to expect and do if they should occur.

0%
Handling Refrigerants 13 minutes

Detecting Leaks, Pump-down and Recovery

Detecting Leaks, Pump-down and Recovery

In this lesson, you will learn how to check for leaks and detect them, perform a pump-down and recover the refrigerant that is still left in the system.

0%
Detecting Leaks 1 minute
Pump-Down 1 minute
Evacuating the System 2 minutes

Dryer and Oil Change

Dryer and Oil Change

In three steps, this lesson focuses on how to change cooler oil, and you will learn how to drain the oil and see the importance of the dryer and sight glass.

0%
Draining the Oil 2 minutes
The Importance of the Dryer 1 minute
Sight Glasses 1 minute

After Service and Repairs

After Service and Repairs

In this lesson, you will learn how to finish the reefer maintenance, by vacuum pumping the system for moisture, topping up the oil and adding new refrigerant.

0%
Vacuuming 1 minute
Adding Oil 1 minute
Adding Refrigerant 1 minute
Assessment: Reefer Unit Maintenance 5 minutes

Lessons

Legislation and Environment

Legislation and Environment

In this lesson, you’ll learn about how refrigerants should be handled so you to abide by the law and take care of the environment.

0%
Introduction to Reefer Unit Maintenance 2 minutes
Greenhouse Gases and the Environment 6 minutes

Health and Safety

Health and Safety

In this lesson, you’ll know how to store and safely handle cylinders, how to prevent incidents from happening, and what to expect and do if they should occur.

0%
Handling Refrigerants 13 minutes

Detecting Leaks, Pump-down and Recovery

Detecting Leaks, Pump-down and Recovery

In this lesson, you will learn how to check for leaks and detect them, perform a pump-down and recover the refrigerant that is still left in the system.

0%
Detecting Leaks 1 minute
Pump-Down 1 minute
Evacuating the System 2 minutes

Dryer and Oil Change

Dryer and Oil Change

In three steps, this lesson focuses on how to change cooler oil, and you will learn how to drain the oil and see the importance of the dryer and sight glass.

0%
Draining the Oil 2 minutes
The Importance of the Dryer 1 minute
Sight Glasses 1 minute

After Service and Repairs

After Service and Repairs

In this lesson, you will learn how to finish the reefer maintenance, by vacuum pumping the system for moisture, topping up the oil and adding new refrigerant.

0%
Vacuuming 1 minute
Adding Oil 1 minute
Adding Refrigerant 1 minute
Assessment: Reefer Unit Maintenance 5 minutes
2

Assessment: Reefer Unit Maintenance

  • 12
  • Questions
  • No time limit
  • 2
  • Attempts left
  • 70%
  • Passing threshold

Question 1 of 12

Why is it important to clean the sight glass when you change oils?

Question 2 of 12

Why are coolants filled in their liquid state?

Question 3 of 12

To what extent should refrigerant bottles be filled?

Question 4 of 12

Why should you shut off the compressor when checking the low-pressure side?

Question 5 of 12

What ozone-depleting substance/s are banned from new units?

Question 6 of 12

What does modern HCF smell like?

Question 7 of 12

Where do refrigerant gases accumulate?

Question 8 of 12

Can you vent newer HFC refrigerants in the atmosphere?

Question 9 of 12

What is true for the recovery bottle?

Question 10 of 12

Why is it important to shut off current to the oil heater?

Question 11 of 12

How should a gas cylinder NOT be lifted?

Question 12 of 12

What is true about the dryer?

You Passed This Quiz. Let’s Move On!

Good work! You just completed the quiz Assessment: Reefer Unit Maintenance. Let’s move on to the next.

Why is it important to clean the sight glass when you change oils?

The sight glass breaks easily, and the breakage/leak can be found easier if the glass is clean.
Your answer
You can see the condition of the oil through the clean sight glass.
Your answer
It increases the life-span of the glass.
Your answer

Why are coolants filled in their liquid state?

To prevent leaks.
Your answer
They contain a mixture of different refrigerants.
Your answer
It’s easier to fill to the right amount.
Your answer

To what extent should refrigerant bottles be filled?

They should be filled all the way up.
Your answer
Always to 60%.
Your answer
If stored above 50°C, never more than 80% filled with gas.
Your answer
If stored at or below 50°C; to 80%.
Your answer

Why should you shut off the compressor when checking the low-pressure side?

Not shutting it off causes a fire hazard.
Your answer
It doesn’t have to be on when checking for leaks on a low-pressure side.
Your answer
It increases the pressure on the low-pressure side.
Your answer

What ozone-depleting substance/s are banned from new units?

Only HCFC.
Your answer
Only CFC.
Your answer
Both CFC and HCFC.
Your answer

What does modern HCF smell like?

HCF smells like gasoline.
Your answer
It has a sweet, ether-like odour.
Your answer
HCF is almost odourless.
Your answer

Where do refrigerant gases accumulate?

They rise to the top of the room.
Your answer
On the ground.
Your answer
They stay where they are released.
Your answer

Can you vent newer HFC refrigerants in the atmosphere?

Yes, of course.
Your answer
Yes, but only in specific amounts.
Your answer
No, they are ozone-depleting.
Your answer
No, it’s illegal since it contributes to global warming.
Your answer

What is true for the recovery bottle?

You should never fill a bottle to more than 75%.
Your answer
You don’t have to label the bottle.
Your answer
You can use any cylinder available.
Your answer

Why is it important to shut off current to the oil heater?

To prevent overheating.
Your answer
To reduce noise.
Your answer
To avoid electrical shock.
Your answer

How should a gas cylinder NOT be lifted?

In the top valve.
Your answer
With both hands .
Your answer
In an upright position.
Your answer

What is true about the dryer?

It reduces odour.
Your answer
It is quite hard to replace.
Your answer
It keeps moisture out of the system.
Your answer
Score: Attempts:

Too Bad! But That Wasn't Enough

Unfortunately you didn’t have enough correct answers to pass the quiz. Try again!

Why is it important to clean the sight glass when you change oils?

The sight glass breaks easily, and the breakage/leak can be found easier if the glass is clean.
Your answer
You can see the condition of the oil through the clean sight glass.
Your answer
It increases the life-span of the glass.
Your answer

Why are coolants filled in their liquid state?

To prevent leaks.
Your answer
They contain a mixture of different refrigerants.
Your answer
It’s easier to fill to the right amount.
Your answer

To what extent should refrigerant bottles be filled?

They should be filled all the way up.
Your answer
Always to 60%.
Your answer
If stored above 50°C, never more than 80% filled with gas.
Your answer
If stored at or below 50°C; to 80%.
Your answer

Why should you shut off the compressor when checking the low-pressure side?

Not shutting it off causes a fire hazard.
Your answer
It doesn’t have to be on when checking for leaks on a low-pressure side.
Your answer
It increases the pressure on the low-pressure side.
Your answer

What ozone-depleting substance/s are banned from new units?

Only HCFC.
Your answer
Only CFC.
Your answer
Both CFC and HCFC.
Your answer

What does modern HCF smell like?

HCF smells like gasoline.
Your answer
It has a sweet, ether-like odour.
Your answer
HCF is almost odourless.
Your answer

Where do refrigerant gases accumulate?

They rise to the top of the room.
Your answer
On the ground.
Your answer
They stay where they are released.
Your answer

Can you vent newer HFC refrigerants in the atmosphere?

Yes, of course.
Your answer
Yes, but only in specific amounts.
Your answer
No, they are ozone-depleting.
Your answer
No, it’s illegal since it contributes to global warming.
Your answer

What is true for the recovery bottle?

You should never fill a bottle to more than 75%.
Your answer
You don’t have to label the bottle.
Your answer
You can use any cylinder available.
Your answer

Why is it important to shut off current to the oil heater?

To prevent overheating.
Your answer
To reduce noise.
Your answer
To avoid electrical shock.
Your answer

How should a gas cylinder NOT be lifted?

In the top valve.
Your answer
With both hands .
Your answer
In an upright position.
Your answer

What is true about the dryer?

It reduces odour.
Your answer
It is quite hard to replace.
Your answer
It keeps moisture out of the system.
Your answer
Score: Attempts:

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