Refrigerated Machine Operator Exam Bundle Graded A+

To temperature operation of a refrigeration system is necessary win - Answer-More than one evaporator is used with one compressor Which of the following is another type of low ambient temperature head pressure control - Answer-Air volume control using shutters in fan cycling ____ are snap acti...

refrigeration - Answer-A branch of science that deals with process of cooling of a space or substance below the environmental temperature. refrigeration system - Answer-An assembly of four major components, namely the compressor, condenser, expansion valve, evaporator through which a very low boi...

What refrigeration systems are most likely to leak refrigerant in building spaces that are being cooled? - Answer-Direct systems An operator has been assigned to a large reciprocating machine without Unloaders of the following safety proper procedure for starting this machine is?5 - Answer-Suctio...

Which of the following is used for piping natural gas? - Answer-Black iron What material is used for refrigerant piping, heating, AC, and refrigeration? - Answer-Copper tubing What material is most commonly used today for cold water piping in houses? - Answer-P VC What material is used for ...

What is a jurisdiction? - Answer-Each province and territory is its own jurisdiction Explain the intent of the regulation's governing the operation of boilers and pressure equipment? - Answer-To give the director or administrator of the department or branch or government a means of evolving, wit...

OF THE FOLLOWING CHARACTERISTICS OF REFRIGERANT, THE ONE THAT BEST DESCRIBES REFRIGERANT 22 IS: - Answer-ODORLESS WHEN MIXED WITH AIR BECAUSE OF THE LATENT HEAT LOAD, REFRIGERATION MACHINE OPERATOR WAS INSTRUCTED TO START THE RECIPROCATING PLANT FOR AIR CONDITIONING. OF THE FOLLOWING ACCORDING TO...

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 ki...

One tone of refrigeration is: a. 13958 kJ per day b. 1000 kg of mass c. 233 kJ per minute d. 13958 J per hour - Answer-C Which of the following is NOT an advantage of a factory assembled, packaged refrigeration unit? a. Components are designed to match each other b. The final installati...

132-picture of pump - Answer-90* reducing elbow, pump suction, pump casing, pump discharge, check valve. 133-picture of a compressor - Answer-Oil charging port allows for the addition and removal of oil from the compressor 134- A facility has failed to maintain water treatment to a refrigerati...

58-Cooling tower water requires the addition of chemical additives in order to. - Answer-Reduce the formation of scale and algae 59-In the picture below describe equipment function - Answer-Remove non condensables from condenser 60-The Viscosity of lubrication oil is described by a number. A l...

Name the 4 steps of a mechanical refrigeration system - Answer-evaporation, expansion, compression, & condensation Name the 4 parts of a refrigeration system - Answer-compressor, condenser, receiver, & evaporator Name the 3 methods of heat transfer - Answer-conduction, convection, & radiation ...

true - Answer-one-trip refrigerant cylinders cannot be refilled under any circumstances true - Answer-if a recovery tank is empty and at atmospheric pressure, it is recommended that the tank be turned upside down with the vapor valve open false - Answer-cylinders of compressed gasses shall be ...

Which is not a basic component of the compression refrigeration cycle? - Answer-D) Suction Filter pg 509 Describe modulating fluid flow - Answer-Modulating fluid flow is throttling the amount of fluid through a gas line. Controlling the flow between maximum or no flow. pg 510 The purpose of th...

What may be the cause of compressor knocking? - Answer-Liquid refrigerant slugging in the compressor. What will happen if the Spring on the TEV was to break ? - Answer-Flood the evaporator and raise suction pressure. What happens in the TEV equalizer line when pressure drops in the evaporator ...

What is refrigeration - Answer-Refrigeration is the removing of heat from an object or mass and then dissipating that same heat in a place where it's presence will not be objectionable. "Refrigeration systems move heat" The refrigeration process is made possible by - Answer-Boiling a refrigera...

efficiency of the refrigerant cycle is affected by the operations of the condenser. Of the following, a more efficient centrifugal compressor operation results from: - Answer-Lowering the condensing pressure The heat removed from the refrigerant in a condenser is: - Answer-sensible and latent hea...

Section _____ , National Recycling and Emissions Reduction Program, of the Clean Air Act of 1990 requires management of refrigerants and refrigeration systems to maximize recovery and recycling of ozone-depleting substances during the servicing and disposal of air conditioning and refrigeration equi...

What concentration is R-717 refrigerant toxic at? - Answer-0.03% by volume in air. What is the toxic level of refrigerant R0123? - Answer-In concentrations over 0.1% by volume in air. What is R-290 (Propane) explosive range - Answer-Between 2.1% and 9.5% What is the explosive range for R-71...

Pressure gauges - Answer-Indicate the conditions inside a refrigeration system. Show evaporator and condenser pressures, they indicate saturation temps. Does CSA B52 require permanently installed pressure gauges on any refrigeration system? - Answer-No, it does not require them. But ammonia syste...

Human Machine Interface (HMI) - Answer-Designed to allow operators to receive operational data and alarms on a screen or a series of screens allowing to make changes to set points or operational expectations. Refrigeration plan capacity must always equal the __________. - Answer-Cooling Load. ...

An example of a pressure vessel is - Answer-A cylinder containing refrigernat for a refrigeration system If you were a technician about to service an air conditioning system using R-22 refrigerant and the temperature of the refrigerant in the cylinder in your truck was 105*F what would be the pre...

Which of the following components is unique to reefer refrigeration operation? - Answer-Three-way valve Which of the following is correct concerning the defrost cycle? - Answer-All of the choices are correct. Which of the following are sources of heat that enter the refrigerated area of the tr...

What is considered a normal box temperature of a walk-in refrigerator - Answer-35-38F What is considered a normal box temperature for a reach in refrigerator - Answer-38-40F What is considered a normal box temperature of a walk-in freezer - Answer--10F What is considered a normal box temper...

Automatic expansion valves work with - Answer-Evaporator pressure closes valve spring pressure opens valve A faulty check in a pump will cause the most damage on - Answer-Startup If the T E V's sensing bulb falls off the suction line you will - Answer-Flood the evaporator A clogged condens...

Safety Study Questions What is the purpose of an SOP? A. To break down the amount of work to be done in a given time. B. To read after the job is done. C. To provide guidance and specific steps necessary to safely operate the system. D. To provide a standard way to perform the job faster. - A...

Which is a disadvantage of a packaged indoor unit - Answer-the potential for excessive noise exists Removing oil and filtering refrigerant for reuse is called - Answer-recycle Which is the best description of temperature - Answer-intensity of heat The type of head pressure control in a cond...

Specific Heat is - Answer-the amount of heat necessary to raise the temperature of a substance one deg F What are two types of heat - Answer-sensible and latent Heat flow by conduction is - Answer-energy travelling from one molecule to another Radiation can be defined as - Answer-transfer o...

The pump best suited to pump heavy viscous liquids is - Answer-A rotary pump Which type of pump produces the greatest suction? - Answer-a positive displacement pump reciprocating pumps: 1) are high pressure pumps 2) must be primed 3) use mechanical seals 4) should be started with the sucti...

What is energy? - Answer-the capacity of a body to do work What is velocity? - Answer-Rate of change of your position What is acceleration? - Answer-the rate of change of velocity What is compression ratio? - Answer-Discharge divided by suction What is Mass? - Answer-the quantity of matt...