100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
B10C1(4) - CH126 Compression Refrigeration Pre-Start Up Procedures Exam Questions and Answers $10.49   Add to cart
Quickly navigate to
Preview
  2.  
  3. Refrigeration Machine Operator
  4.  
  5. Refrigeration machine operator

Exam (elaborations)

B10C1(4) - CH126 Compression Refrigeration Pre-Start Up Procedures Exam Questions and Answers
 6 views  0 purchase
  • Course
  • Refrigeration machine operator
  • Institution
  • Refrigeration Machine Operator

Ammonia leaks may be traced with a wetted test paper treated with: a. Caustic soda b. Potassium chromate indicating liquid c. Potassium iodide-iodate d. Litmus solution e. Sulphuric acid. - Answer-D A sulphur candle is a test for what: a. Freon leaks b. Ammonia leaks c. Air leaks d....

[Show more]

Preview 2 out of 5  pages

Document information

  • September 10, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • b10c14 ch126 compression refrigeration pre sta
  • ammonia leaks may be traced with a wetted test pap

Written for

  • Refrigeration machine operator
  • Refrigeration machine operator

Seller

avatar-seller
lectknancy

Reviews received

Content preview

B10C1(4) - CH126 Compression
Refrigeration Pre-Start Up Procedures
Exam Questions and Answers
Ammonia leaks may be traced with a wetted test paper treated with:
a. Caustic soda
b. Potassium chromate indicating liquid
c. Potassium iodide-iodate
d. Litmus solution
e. Sulphuric acid. - Answer-D

A sulphur candle is a test for what:
a. Freon leaks
b. Ammonia leaks
c. Air leaks
d. Vacuum seal
e. CFC leaks. - Answer-B

Before charging a system which of the following needs to be done?
a. The interlocks need to be tested
b. The sequence of controls must be tested
c. The controls need to be set
d. The required valves need to be opened
e. All of the above - Answer-E

The initial refrigerant charge is given where on the system?
a. The high side of the system
b. The low side of the system
c. The evaporator
d. The expansion valve
e. The heat exchanger - Answer-A

Which of the following statements about Manual Purging Systems is false?
a. Gas being vented into the atmosphere must pass through a beaker filled with water.
b. The receiver and condenser should be purged separately.
c. Purging rids the system of non-condensable gases.
d. Refrigerant vapour in the purger is always expelled with the
non-condensable gases.
e. They must be operated on a regular schedule. - Answer-D

When initially charging a refrigeration system:
a. It must be done with the liquid line shutoff valve open
b. It is done with a liquid refrigerant

, c. It must be done after the unit is shut down
d. It must be done at the compressor suction
e. Water should be added to dilute the refrigerant. - Answer-B

Higher than normal head pressure is undesirable for all of the following reasons except:
a. It increases power consumption
b. It decreases condenser capacity
c. It reduces compressor capacity
d. It over stresses compressor parts
e. It is detrimental to compressor lubrication. - Answer-B

Which of the following is not a recommended step for the procedure in which dry
nitrogen is used for a system leak test?
a. Remove controls and relief valves that may be damaged by
the test pressure.
b. Set the pressure, reducing valve for the minimum design
pressure of the high side.
c. Close the liquid line shut-off valve.
d. Open the cylinder shut-off valve and disconnect the nitrogen
cylinder.
e. Connect the nitrogen cylinder to the system, charging valve. - Answer-D

The chilling coil in an automatic purger has a primary function to:
a. Separate refrigerant vapour from the non-condensable gases
to be purged.
b. Keep the system cooling while being purged.
c. Increase the efficiency of the system.
d. Keep discharge through the coil at the lowest available suction
pressure.
e. Lower the operating temperature of the purger. - Answer-A

Before commencing to operate a new plant, or one in which piping alterations have
been made, the refrigerant system must be tested for:
a. High pressure
b. Vacuum control
c. Excessive oil consumption
d. Excessive vibration
e. Leaks. - Answer-E

Frost formation on the suction line indicates what?
a. Moisture in the system
b. "Copper-Plating" on the bearings and compressor exhaust valve
c. Overcharging the system
d. Thermostat controlled solenoid deterioration
e. Inadequate levels of refrigerant in the system. - Answer-C

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller lectknancy. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

83637 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$10.49
  • (0)
  Add to cart