It is a type of refrigeration system where only part of thecirculated refrigerant is evaporated, with the remainder being separated from the vapor and then recirculated. How do you callthis system?

How do you call the ice formation on a refrigeration system atthe expansion device, making the device inoperative?

In a lithium bromide solution absorption refrigeration system,which of the following is the function of water?

In the absorption refrigeration system, is a pressure vesselmounted above the generator through which the vapor leavingthe generator pass. How do you call this component?

In the absorption refrigeration system, it is the inlet part of thecondenser, cooled by a separate circuit of cooling water or strongaqua. It condenses a small part of the vapor leaving the bubblecolumn and returns it as a liquid to the top of baffle plate. Thisensures that the vapor going to the condenser is lowered intemperature and enriched in ammonia. What is this component?

Which of the following is a scale of temperature in which themelting point of ice is taken as 0o and the boiling point of wateris 80o?

What is the amount of heat energy required to raise thetemperature of one pound of water one degree Fahrenheit. It is1/180 of the heat required to raise the temperature of one poundof water from 32 to 212 oF at constant atmospheric pressure of14,696 psi absolute.

How do you call the mixtures or substances that are used inlaboratory methods of producing a drop in temperature? Themost common example is the mixture of ice and salt.

It the maximum temperature of any gas or vapor at which it maybe condensed into a liquid; above this temperature, it isimpossible to condense regardless of the pressure applied. Howdo you call this temperature?

Any refrigerant that exists as a liquid under normal atmosphericpressure and temperature must be vaporized in an evaporatorunder a pressure below atmospheric. This is sometimes referredto as:

It is any one of a group of refrigerants that have been developedsince about 1925 to overcome the irritating or toxic effects ofrefrigerants, such as ammonia and sulfur dioxide and the highcondensing pressures required with carbon dioxide. How doyou call these refrigerants?

This refrigeration system component combines the functions of acooling tower and a condenser. It consists of a casing enclosing afan or blower section, water eliminators, refrigerant condensingcoil, water pan, float valve, and spray pump outside the casing.How do you call this component?

It refers to a factor used in calculating the over-all heat transfer through the tube walls of a condenser tube or other heating surface. It includes the sum of the heat-transfer rate of the layer of dirt and foreign material that builds up on the water side of the tube. What is this factor?

It is a refrigeration system evaporator which is arranged with atank or a single drum (accumulator) located above the coil so that the inside of the evaporator is full of refrigerant. How do you call this type of evaporator?

What is the standardized term used by the industry to describeany device that meters or regulates the flow of liquid refrigerantto an evaporator?

Define a “control valve”.

A pneumatic temperature control is used on the steam supply toa non-storage heat exchanger that heats water serving an officeheating system. What is referred to as “manipulated variable”?

How do you classify a solenoid valve?

What is a thermostat?

Which of the following is the one of the main purposes ofrefractory in a boiler furnace?

Balance pressure traps are what type of steam trap?

What is a characteristic feature of thermodynamic steam traps?

What are the main considerations for steam trap selection?

Can temperature controlled applications be trapped?

Unless they are designed to flood, what is the important whenremoving condensate from heat exchangers?

How is flash steam produced?

Are steam traps required to pass air?

How do you call a system employing open sprinklers attached toa piping system connected to a water supply through which isopened by the operation of a fire detection system installed inthe same areas as the sprinklers?

What is probably the first consideration when selecting a controlsystem?

Which of the following ranges of humidity ratio is used forcomfort air conditioning?

Why is a boiler feed tank heated to approximately 85 oC?

What is used to dry air?

What causes water hammer in the boiler?

How does air enter a steam system?

Why should strainers installed on steam lines be fitted on theirsides?

What is the result of using a heat exchanger rating to calculate itssteam consumption?

For any particular tank temperature how does the heat loss fromthe lid of a closed tank compare with that of bottom?

What is the disadvantage of heating a tank by direct steaminjection?

The existing 2000 TR chiller at a large hospital, where you areassigned as Engineer, must be replaced. Which of the followingtypes most likely to be installed?

Refrigeration condensers are rated based upon their ability toreject the total heat that comes from which of the following?

A published ‘U’ value from a steam coil to a water basedsolution is given as 550 – 1300 W/m2-oC. When would be figurenear the lower end of the range be used?

Air enters a cooling tower at 10 oC DB and 9.5 oC WBtemperature. It leaves the tower saturated at 21 oC. Whichcondition is a likely outcome of this?

A tank is to be heated by direct steam injection. How will thequantity of heat required compare with steam coil heating?

Which of the following parameters has the greatest limitingeffect on the thermal performance of an open, evaporativecooling tower?

It is a space, or several rooms, or units of space having some sortof coincident loads or similar operating characteristics. It may ormay not be an enclosed space, or it may consist of manypartitioned rooms. How do you call this?

In air conditioning, it indicates either a volume or a site withouta partition or a partitioned room or group of rooms. How do youcall this?

It is an enclosed or partitioned space that is usually treated as asingle load. If conditioned, it often has an individual controlsystem. What is this?

It represents the rate, in Btu/hr or W, at which heat enters aconditioned space from an external source or is released to thespace from an internal source during a given time interval.

It is the rate, in Btu/hr or W, at which heat must be removedfrom a conditioned space so as to maintain a constanttemperature and acceptable relative humidity. Its sensible loadcomponent is equal to the sum of the convective heat transferfrom the surfaces of the building envelope, furnishings,occupants, appliances, and equipment. How do you call this?

What is the basic index used to describe the radiant conditions ina space, it is the mean temperature of individual; exposedsurfaces in the environment?

In order to avoid cavitation in a centrifugal pump, which of thefollowing is true?

What is a body insultion that is usually described as a singleequivalent uniform layer over the whole body?

The speed of sound is also called as:

This is the velocity at which a small pressure wave movesthrough a fluid. How do you call this velocity?

It is a closed vessel in which steam or other vapor (to be usedexternally to itself) is generated by the direct application of heatused for power generation. How do you call this boiler?

It is a closed vessel intended for use in heating water of forapplication of heat to generate steam or other vapor to be usedexternally from it. What do you call this pressure vessel?

When new boilers are installed in either existing or newbuildings, a minimum height of at least ______ shall be providedbetween top of the boiler proper and ceiling.

For power boilers, when the tensile strength of steel is notknown, it shall be taken as 379 MPa and which of the followingfor the wrought iron?\

Name one characteristic feature of mechanical steam traps.

In a mechanical steam trap, what added benefit does theautomatic air vent offer to a float trap?

A heat exchanger is designed to operate without waterlogging ofthe steam space. What is the usual choice of trap for its drainage?

What is a common cause of waterhammer in drying coils?

The maximum allowable working pressure of a non-code steel orwrought iron heating boiler of welded construction shall notexceed to which of the following pressures?

What do you call a refrigeration system in which the refrigerantgas evolved in the evaporator is taken up in an absorber andreleased in a generator upon the application of heat?

What do you call a shut-off valve other than a valve forcontrolling the flow of refrigerant in a refrigeration system?

It is a boiler fuel created from the residue produced from crudepetroleum after it has been distilled to produce lighter oils likegasoline, paraffin, kerosene, diesel or gas oil. What is this fuel?

It is the ratio of the amount of heat taken up by a substance tothe temperature at which the substance exists. How do you callthis?

Upon entering the boiler room, you find the water out of theglass, the safety valve blowing off strong, and a fire under theboiler. Your first action would be to:

The A.S.M.E. Boiler code for boiler shells requires a tensilestrength of which of the following, in psi?

In a Carnot cycle, heat addition occurs during which of the following processes?

Stirling cycle is also called as: 

Ericson cycle is also called as: 

It is the generic term given to a family of solid fuels with high carbon content. How do you call this?

Pressure drop caused by friction in fully developed fluid flow can be determined directly using which of the following? 

The existing 2000 TR chiller at a large hospital, where you are assigned as Engineer, must be replaced. Which of the following types most likely to be installed?

Which of the following parameters has the greatest limiting effect on the thermal performance of an open, evaporative cooling tower?

Note: It is not possible to cool the water below the air’s wet-bulb temperature. Thus, the WB temperature, more than any other parameter, sets the absolute limit on the cooling tower’s capacity. 

The amount of heat required melting a ton (2000 lbs) of ice at 32°F, 288,000 Btu/24 hr, 12,000 Btu/hr, or 200 Btu/min. 

It is the temperature of vapor refrigerant above its saturation temperature corresponding to the given pressure.. 

What is the chemical name of R-23?

In a vapor-compression refrigeration system, evaporator is a component normally called as: 

It is a component in the refrigeration system that returns the lubricating oil, carried over by the refrigerant vapors, to the compressor. How do you call this component? 

It is a boiler fuel created from the residue produced from crude petroleum after it has been distilled to produce lighter oils like gasoline, paraffin, kerosene, diesel or gas oil. What is this fuel?

What do you call a form of boiler fuel that is easy to burn, with very little excess air?

It defined as energy added to or removed from a system divided by the mean absolute temperature over which the change takes place. How do you call this?

The second law of thermodynamics says that whenever energy is exchanged or converted from one form to another, the potential for energy to do work will be _________.

It is a space, or several rooms, or units of space having some sort of coincident loads or similar operating characteristics. It may or may not be an enclosed space, or it may consist of many partitioned rooms. How do you call this? 

In air conditioning, it indicates either a volume or a site without a partition or a partitioned room or group of rooms. How do you call this?

What is true about steam as it condenses?

It is an increase in fluid pressure in a long pipe caused by a sudden velocity decrease, where the sudden decrease in velocity is caused by a valve closing. 

It is the term referring to any glazed aperture in a building envelope; the components of which include the following: glazing material, either glass or plastic; framing, mullions, muntins, and dividers; external shading devices; and integral-shading systems (between glass). What is this?

It is an envelope area with significantly higher rate of heat transfer than the contiguous enclosure. How do you call this? 

How is the water in a pressurized deaerator heated to the required temperature? 

It is the rate, in Btu/h or W, of heat transfer at the coil. Its cooling load component is the rate at which heat is removed by the chilled water flowing through the coil or is absorbed by the refrigerant inside the coil. What do you call this?

It is the rate, in Btu/hr or W, at which heat is added to the conditioned air from the hot water, steam, or electric heating elements inside the coil.

It is an upward force that is exerted on an object (like flat plate, airfoil, rotating cylinder, etc.) as the object passes through a fluid. What do you call this?

What is a frictional force that acts parallel but opposite to the direction of motion of fluid?

It is a humidity sensor used to measure relative humidity, dew point, or absolute humidity of ambient or moving air. This device could be mechanical or electronic. How do you call this?

It is a device designed to control the flow of steam, water, gas, or other fluids. It can be considered a variable orifice positioned by an actuator in response to impulses or signals from the controller. It may be equipped with either a throttling plug, V-port, or rotating ball specially designed to provide a desired flow characteristic. How do you call this device.

It is a term used by automobile manufacturers to designate the power required to move a car horizontally at 50 mi/hr against the drag force. What is this?

A manufacturer claims that it has a COP of 2.0 when cooling a food at 5 o C using ambient air at 30 o C as a heat sink. Is the claim of the manufacturer valid?

A storage chamber for low-side liquid refrigerant; also known as surge drum, or surge header. Also, a pressure vessel whose volume is used in a refrigerant circuit to reduce pulsation.

. A form of aluminum oxide that absorbs moisture readily and is used as a drying agent.

A form of carbon made porous by special treatment by which it is capable of absorbing various odors, anesthetics and other vapors.

What can you say about the velocity of fluid at the center of the pipe section?

Continuity equation is applicable to which of the following?

Hygrometer is an instrument used to determine of which of the following?

The temperature at which the condensation of water vapor in a space begins for a given state of humidity and pressure as the temperature of the vapor is reduced. This is the temperature corresponding to saturation for a given absolute humidity at constant pressure.

The temperature of gas or mixture of gases indicated by an accurate thermometer after correction for radiation.

The temperature registered by a thermometer whose bulb is covered by a wetted wick and exposed to a current of rapidly moving air.

The ratio of the actual water vapor pressure of the air to the saturated water vapor pressure of the air at the same temperature is known as:

The weight of water vapor in grains, pounds, grams, or kilograms per grain, pound, gram, or kilogram of dry air.

At critical point of a pure substance, what is the value of latent heat?

Which of the following is a function of a steam nozzle?