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
Power Engineering 3B2 Chapter 11 Exam Questions with Correct Answers $15.49   Add to cart
Quickly navigate to
Preview
  2.  
  3. Refrigeration Machine Operator
  4.  
  5. Refrigeration machine operator

Exam (elaborations)

Power Engineering 3B2 Chapter 11 Exam Questions with Correct Answers
 8 views  0 purchase
  • Course
  • Refrigeration machine operator
  • Institution
  • Refrigeration Machine Operator

When the pressure difference across a capillary tube is increased: a. The flow of refrigerant increases. b. The flow of refrigerant decreases. c. The pressure of the refrigerant increases. d. The pressure of the refrigerant decreases. e. There is no change in the flow rate. - Answer-a The k...

[Show more]

Preview 2 out of 12  pages

Document information

  • September 10, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • power engineering 3b2 chapter 11 exam questions wi
  • when the pressure difference across a capillary tu

Written for

  • Refrigeration machine operator
  • Refrigeration machine operator

Seller

avatar-seller
lectknancy

Reviews received

Content preview

Power Engineering 3B2 Chapter 11
Exam Questions with Correct Answers
When the pressure difference across a capillary tube is increased:
a. The flow of refrigerant increases.
b. The flow of refrigerant decreases.
c. The pressure of the refrigerant increases.
d. The pressure of the refrigerant decreases.
e. There is no change in the flow rate. - Answer-a

The king valve on an ammonia vapor compression system serves as a:
a. Refrigerant control valve.
b. Valve to connect the ammonia drum when charging the
system.
c. Brine control valve.
d. Master isolation shut-off valve.
e. The condenser flow control. - Answer-d

The automatic expansion valve is controlled by:
a. A transmitter.
b. The evaporator pressure.
c. Capillary action.
d. The refrigerant level.
e. The king valve. - Answer-b

The thermostatic expansion valve controls refrigerant flow by:
a. The liquid level in the condenser.
b. A temperature sensor at the evaporator inlet.
c. The evaporator pressure.
d. The liquid level in the evaporator.
e. A temperature sensor at the evaporator outlet. - Answer-e

The emergency discharge line on refrigeration systems shall:
a. Be connected directly to the top of the receiver or other vessel
used for storing the refrigerant
b. Be connected to the compressor
c. Have two valves connected to charging drum
d. Be connected directly to the top of the condenser and the
compressor
e. Have two return bends in the piping. - Answer-a

A capillary tube is mainly used on:
a. Large industrial refrigeration units.
b. Small household systems.

, c. Ammonia systems.
d. Lithium bromide units.
e. Absorption systems. - Answer-b

The high-side float is usually installed on the:
a. Liquid receiver or may act as a float chamber itself.
b. Evaporator inlet.
c. Condenser .
d. Line between the compressor and condenser.
e. Line between the condenser and receiver. - Answer-a

The capillary tube has a:
a. Very small diameter.
b. Medium sized diameter.
c. Large diameter.
d. Convergent-divergent cross-section.
e. Concaved cross-sectional area. - Answer-a

The emergency valve on ammonia systems should be:
a. Located near the compressor
b. Between emergency line and the evaporator
c. Located outside the building
d. Near the fire alarm
e. Located at the exit leading to the outside of the building. - Answer-c

The starting and stopping of the compressor is normally done automatically by means
of:
a. A pressure-limiting device.
b. An automatic low pressure cut out.
c. Either a temperature actuated control or a pressure-actuated control.
d. A rheostat.
e. A heat sensor in the evaporator. - Answer-c

Refrigeration condenser cooling water is usually controlled by:
a. Level controls.
b. Cooling tower demands.
c. Compressor discharge pressure.
d. Hand operated gate valves.
e. The level in the receiver. - Answer-c

A low-pressure control in a refrigerating system can be used for:
a. Condenser pressure control.
b. Starting and stopping the compressor.
c. Purging non-condensable gases.
d. Keeping the receiver pressure from getting too high.
e. Evaporator pressure control. - Answer-b

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 $15.49. 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
$15.49
  • (0)
  Add to cart