Skills and Trades

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Why does the EPA not require that all leaks be fixed? A) Type III systems are exempt. B) Charges ... Started by torybrooks	1 Replies 14 Views	Jul 26, 2018 by nital
A technician checks the coil of a relay with his ohmmeter, and the reading on the scale is infinity. ... Started by mmm	3 Replies 74 Views	Jul 26, 2018 by kishoreddi
Leaks in commercial refrigeration systems must be repaired if they have an annual leak rate of: ... Started by asd123	1 Replies 46 Views	Jul 26, 2018 by 31809pancho
The coil for a contactor or relay: A) Is controlled by its contact - the contacts close to ... Started by evelyn o bentley	1 Replies 37 Views	Jul 26, 2018 by pangili4
What is the difference between a contactor and a motor starter? A) Motor starters are only used ... Started by jman1234	1 Replies 63 Views	Jul 26, 2018 by wuly
If the low side test pressure is not know, the maximum pressure that should be used for leak testing ... Started by ec501234	3 Replies 64 Views	Jul 26, 2018 by CharlieArnold
What material are relay contacts made of? A) Copper B) Silver-cadmium C) Silver D) Stainless ... Started by bobthebuilder	1 Replies 79 Views	Jul 26, 2018 by chevyboi1976
The auxiliary contacts on a magnetic starter are typically: A) Wired in parallel with the main ... Started by Caiter2013	1 Replies 32 Views	Jul 26, 2018 by jesse.fleming
The purpose of replaceable overload heaters in magnetic starters: A) Match the overload trip ... Started by K@	1 Replies 32 Views	Jul 26, 2018 by jliusyl
When ohming the windings of a 24 volt control transformer: A) The primary winding should have a ... Started by lidoalex	3 Replies 84 Views	Jul 26, 2018 by brittrenee
A technician checks the resistance of the primary winding on a transformer and reads 0. 2 ohms. This ... Started by serike	1 Replies 83 Views	Jul 26, 2018 by Sarahjh
What is the general formula for calculating the effect of temperature on a holding charge? A) P2 ... Started by tichca	1 Replies 16 Views	Jul 26, 2018 by Animal_Goddess
Overloads sense current by converting it to: A) Magnetism. B) High energy RF signals. C) Either ... Started by savannahhooper	1 Replies 21 Views	Jul 26, 2018 by Pswine
The coil and contacts in a pilot duty overload are: A) Only connected to the circuit when there ... Started by berenicecastro	3 Replies 63 Views	Jul 26, 2018 by coyin
When done properly, evacuation also yields which of the following benefits? A) A leak-tight ... Started by newbem	1 Replies 24 Views	Jul 26, 2018 by SAUXC
When a line duty overload protecting a motor detects an overload, it: A) Contacts the air ... Started by leo leo	1 Replies 67 Views	Jul 26, 2018 by TheDev123
Which of the following describes the consequence of noncondensable gasses collecting in the ... Started by c0205847	1 Replies 18 Views	Jul 26, 2018 by Benayers
The compressor in a system operating with non-condensable gasses: A) Draws an unusually low amp ... Started by penguins	3 Replies 25 Views	Jul 26, 2018 by ebonylittles
What effect do non-condensable gases have on a refrigeration system? A) They increase evaporator ... Started by elizabeth18	1 Replies 33 Views	Jul 26, 2018 by rosiehomeworddo
Compared to relay logic systems, solid state logic systems: A) Use more power to operate. B) ... Started by ahriuashd	1 Replies 59 Views	Jul 26, 2018 by bob
Microns used to measure deep vacuum by measuring: A) The distance between the remaining ... Started by javeds	1 Replies 38 Views	Jul 26, 2018 by mcarey591
Compared to the stator current, the rotor current is: A) Opposite in polarity. B) Much stronger. ... Started by big1devin	3 Replies 49 Views	Jul 26, 2018 by morganmarie791
The proper order for repairing a system after identifying a leak in a brazed joint on the discharge ... Started by ghost!	1 Replies 22 Views	Jul 26, 2018 by KKcool
The crew leaders primary job is to _____. a. make sure the job is done correctly and on time b. ... Started by skymedlock	1 Replies 75 Views	Jul 26, 2018 by cascooper22
Evacuation will proceed faster: A) With Shrader valve cores removed. B) With Shrader valve cores ... Started by azncindy619	1 Replies 71 Views	Jul 26, 2018 by zenzy