Skills and Trades

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Azeotropes are mixtures of two refrigerants: A) That separate when changing state. B) That are ... Started by joe	1 Replies 20 Views	Jul 24, 2018 by alexanderhamilton
What difference is there between handling zeotropes and azeotropes? A) There is no difference in ... Started by lbcchick	3 Replies 47 Views	Jul 24, 2018 by bassamabas
The temperature where small bubbles first start to form in saturated liquid is known as the: A) ... Started by MirandaLo	1 Replies 29 Views	Jul 24, 2018 by parker125
The separation of the refrigerant components in a zeotropic refrigerant when the refrigerant ... Started by APUS57	1 Replies 180 Views	Jul 24, 2018 by steff9894
In a water-cooled condenser, what do an increase in head pressure and a decrease in temperature ... Started by a0266361136	1 Replies 82 Views	Jul 24, 2018 by raili21
A refrigerant blend with a glide of 10F or more would be considered: A) A low glide blend. B) A ... Started by lidoalex	3 Replies 63 Views	Jul 24, 2018 by Sammyo
The outside diameter of schedule 40 black iron pipe is approximately: A) inch larger than the ... Started by Tazate	1 Replies 61 Views	Jul 24, 2018 by Cnarkel
When installing a piping system with iron pipe: A) The pipe must be threaded and fitted. B) The ... Started by sammy	1 Replies 58 Views	Jul 24, 2018 by fffftttt
A refrigerant's temperature is controlled by its: A) Environment. B) State. C) Molecular ... Started by mspears3	1 Replies 24 Views	Jul 24, 2018 by reelove4eva
The refrigerant inside most refrigerant cylinders is a: A) Saturated liquid-vapor mix. B) ... Started by RODY.ELKHALIL	3 Replies 54 Views	Jul 24, 2018 by medine
The pressure of a refrigerant cylinder containing saturated refrigerant: A) Is determined by both ... Started by jCorn1234	1 Replies 133 Views	Jul 24, 2018 by shailee
What is the difference between the compressor operating temperatures in an air-cooled condenser and ... Started by naturalchemist	1 Replies 63 Views	Jul 24, 2018 by fwbard
The steps to connect PVC and CPVC pipe include: A) Clean, prime, apply solvent, and fit the pipe. ... Started by urbanoutfitters	1 Replies 49 Views	Jul 24, 2018 by aburgess
If the refrigerant is recovered improperly from a water-cooled condenser: A) The oil dissolved in ... Started by james	3 Replies 60 Views	Jul 24, 2018 by Mollythedog
The preferred tool for cutting PVC pipe is: A) A plastic tubing shear. B) A pocket knife. C) A ... Started by jilianpiloj	1 Replies 41 Views	Jul 24, 2018 by dlook33
Which of the following articles of clothing is a potential safety hazard when soldering? A) ... Started by casperchen82	1 Replies 15 Views	Jul 24, 2018 by fraziera112
A refrigerant's safety rating is a combination of the toxicity letter and the: A) Freezing point. ... Started by LCritchfi	1 Replies 47 Views	Jul 24, 2018 by 14vl19
How are refrigerants with a higher toxicity level labeled? A) Letter B B) Letter A C) Letter D D) ... Started by pane00	3 Replies 90 Views	Jul 24, 2018 by olderstudent
How can technicians protect themselves from hot sparks produced by most welding processes? A) ... Started by jwb375	1 Replies 61 Views	Jul 24, 2018 by Tabitha_2016
Why are biocides added to cooling-tower water? A) To reduce biofilm B) To increase biofilm C) To ... Started by ss2343	1 Replies 341 Views	Jul 24, 2018 by Liamb2179
The major safety concern with R-410A compared to most other common refrigerants is that: A) ... Started by anshika	1 Replies 94 Views	Jul 24, 2018 by ciecieme
What material should clothes worn during welding be made of? A) 100 polyester B) 100 cotton C) ... Started by ss2343	3 Replies 47 Views	Jul 24, 2018 by angrybirds13579
What is the best pH level to maintain in a water tower? A) The pH of the water has very little ... Started by sam.t96	1 Replies 237 Views	Jul 24, 2018 by kardosa007
How many BTUs does each pound of water evaporating remove? A) 970 B) 1070 C) 1170 D) ... Started by B	1 Replies 35 Views	Jul 24, 2018 by babybsemail
If the water entering a water-cooled condenser is 80F, what would the leaving water temperature be? ... Started by chandani	1 Replies 106 Views	Jul 24, 2018 by rekilledagain