HVAC Water Chillers Quiz # 4

Following HVAC MCQs practice Quiz Questions are related to ,HVAC ,water chillers, absorption cooling chillers ,(single effect and double effect) and Lithium Bromide Chillers.

 

(See here HVAC quiz # 1   HVAC Quiz # 2    HVAC Water Chillers Quiz # 3 )

 

(Should you  require following hvac quiz in pdf /ms word form,write down your email address in the comments below) 

 

1. Capacity of absorption chiller is controlled through.

heat source
cooling water
chilled water flow
all of above


2. Which of the following statements is true for a lithium bromide?

It has same boiling point as water
Its absorption capacity decreases with temperature
It is used as refrigerant in absorption chiller
More than one statement is true


3. Which of the following statements is true for low pressure generator of lithium bromide chiller?

It heats the intermediate solution with vapors
It heats the vapor-solution by intermediate solution
It has its own steam source for heating the weak solution
None of above


4. Which of the following statements is true for high pressure generator of lithium bromide chiller?

It heats the intermediate solution with vapors
It heats the vapor-solution by intermediate solution
It has its own steam source for heating the weak solution
None of above


5. Which of the following statements is true for evaporator of lithium bromide chiller?

refrigerant gets vaporized by lithium bromide
refrigerant gets vaporized by taking heat from chilled water
Refrigerant is condensed by cooling water
None of above


6. Which of the following statements is true for condenser of lithium bromide chiller?

refrigerant gets condensed by lithium bromide
refrigerant gets vaporized by taking heat from chilled water
Refrigerant is condensed by cooling water
None of above


7. Which of the following statements is true for absorber of lithium bromide chiller?

vapor absorb lithium bromide in it
vapors are absorbed by lithium bromide in it.
absorbent is condensed by cooling water
None of above


8. Which of the following statements is true for LT heat exchanger of lithium bromide chiller?

It heats the intermediate solution with weak solution
It heats the weak solution with intermediate solution
It heats the weak solution with solution coming from low pressure generator
None of above


9. Which of the following statements is true for HT heat exchanger of lithium bromide chiller?

It heats the intermediate solution with weak solution
It heats the weak solution with strong solution
It heats the weak solution with solution coming from low pressure generator
It heats the weak solution with solution coming from HP generator


10. Which of the following statements is true for refrigerant pump of lithium bromide chiller?

It transports weak solution from evaporator to absorber
It transports the strong solution from generator to absorber
It transfers the weak solution from absorber to generator
It sprays again the refrigerant within evaporator from bottom

HVAC Water Chillers Quiz # 3

Following MCQs practice Quiz is related to ,HVAC ,absorption cooling chillers (single effect and double effect) and Lithium Bromide Chillers.

(See here HVAC quiz # 1   HVAC Quiz # 2 )

 

(Should you  require following hvac quiz in pdf /ms word form,write down your email address in the comments below) 

1. Temperature ______when water is absorbed in lithium bromide solution

Does not change
reduces
increases
none of these

2. Which of following component shares common pressure with low pressure generator

generator
condenser
absorber
evaporator

3. Absorbent capacity increases when temperature of solution

Increases
decreases
remains unchanged
All of above

4. In ammonia-water system, ammonia is_____ and water is ______.

refrigerant,absorbent
absorbent,refrigerant
both refrigerant
none of these

5. In lithium bromide-water system, lithium bromide is_____ and water is ______.

refrigerant,absorbent
absorbent,refrigerant
both refrigerant
none of these

6. Crystallization in lithium bromide chillers is more likey

at lower concenrtation
at higher concentartion
in condenser
none of these

7. When crystallization occurs in lithium bromide chillers

chilled water temp decreases further
chilled water temp increases
no effect on working
none of above

8. In lithium bromide chillers ,crystallization is most likely to occur in

evaporator
absorber
LT hX
HT Hx

9. In lithium bromide chillers when crystallization occurs,

crystalls of refrigerant are formed
crystalls of absorbent are formed
refrigerant becomes ice
None of these

10. 4 components of absorption chiller are

evaporator,condenser,generator and absorber
evaporator,compressor,condenser,expansion valve
evaporator,condenser,generator and compressor
More than one statement is true

HVAC Quiz # 2

Following MCQs practice Quiz is related to ,HVAC ,absorption cooling chillers (single effect and double effect)and Lithium Bromide Chillers.

 

(Should you  require following hvac quiz in pdf /ms word form,write down your email address in the comments below)  

HVAC Water Chillers Quiz # 2      (See here HVAC quiz # 1)

HVAC Quiz

1. A generator in absorption system heats the solution to

separate the refrigerant
extract strong solution for recycle
vaporize absorbent
Both a & b


2. Absorbent (Lithium bromide) cycles through ____.

Evaporator and absorber
Absorber and generator
Condenser & evaporator
All of above


3. At the low pressure evaporator condition, the solution can absorb additional refrigerant if it

Compressed
Cooled
De-sorbed
Heated


4. In an absorption system, refrigerant

Cycles only between condenser and evaporator
is all time absorbed in the solution throughout the cycle
is most diluted on leaving the absorber
provides cooling in the evaporator


5. When leaving the generator, refrigerant vapors travel to_____and solution travels to_____.

Condenser, absorber
Condenser, evaporator
evaporator,absorber
None of above


6. One of main uses of absorption chillers-heaters is to provide ______

Chilled water only
Chilled & hot water
hot water only
none of above


7. Air ingress in absorption chillers,

increases the vacuum
increases the pressure
has no effect
all of above


8. Absorption chillers operate at

High vacuum
Normal temp & Press
Positive press
All of above


9. Double effect absorption machines have

one generator & one evaporator
two condensers
two generators & one evaporator
none of


10. Non-condensable gases in the system ____ the system pressure and _______system capacity.

decrease, increase
Increase, decrease
do not affect
none of these

HVAC Quiz # 1

Following Quiz is related to ,HVAC ,vapor absorption cycle (single effect and double effect)and Lithium Bromide Chillers.

(Should you require quiz in pdf /ms word form,write down your email address in the comments below)  

1. Expansion device in refrigeration machines is also sometimes called

Condenser
Compressor
Evaporator
Throttle valve


2. Solution in absorption chiller consists of

Refrigerant only
Rrefrigerant and water
Refrigerant & absorbent
None of above


3. Heat in the lithium bromide chiller generator releases_________ from solution.

refrigerant vapors
water (in liquid form)
absorbent vapors
None of them


4. The maximum refrigerant vapors from evaporator are absorbed in the absorbent in the ___ .

Evaporator
Heat exchanger
absorber
Generator


5. A solution with relatively high % of absorbent and relatively low % of refrigerant is called

Weak solution
Absorbent
Refrigerant
Strong solution


6. A solution with relatively low % of absorbent and relatively high % of refrigerant is called

Weak solution
Dilute solution
both A & B
None of above


7. Generator in single effect absorption chiller receives strong solution from

Evaporator
LT/HT hx
Absorber
invalid question


8. In the absorption process, refrigerant (water) is absorbed into a(n) _____

absorbent
solution in absorber
strong solution
All of above


9. Common heat sources for absorption system generator are________.

Steam
Hot water
Gas
All of above


10. Conversion of the strong solution into solid or slushy mass is called

Condensation
Desorption
Evaporation
Crystallization