📝 [PIPE] QB ID: 0418 | VIE 03 – PIPE Elements

Where deaerating heaters are not employed, it is recommended that the temperature of the feed water be not less than _____

Is a reaction during which chemical energy is released in the form of heat.

By reheating the steam in an ideal Ranking cycle the heat rejected will _____.

By increasing the boiler pressure in Rankine cycle the moisture content at boiler exit will _____.

Presently the highest steam temperature allowed at the turbine inlet is about _____.

Two most common gases employed in Stirling and Ericsson cycles are.

In most common design of gas turbine, the pressure ratio ranges from

In Brayton cycle, the heat is transformed during what process?

The fuel injection process in diesel engine starts when the piston _____

If the cut-off ratio of diesel cycle increases, the cycle efficiency will

The fuel used in a power plant that is used during peak periods.

Typical compression ratio of Otto cycle is

If Joule Thomson Coefficient is equal to zero, then the process will become

If the fluid passed through a nozzle its entropy will:

Refrigerant consisting of mixtures of two or more different chemical compounds, often used individuals as refrigerant for other applications.

Pairs of mating stop valves that allow sections of a system to be joined before opening these valves or separated after closing them

An enclosed passage way that limits travel to a single path.

For immediate dangerous to life or health (IDHL), the maximum concentration from which unprotected persons are able to escape within _____ without escape-impairing symptoms or irreversible health.

The volume as determined from internal dimensions of the container with no allowance for the volume of internal parts.

A waiting room or large hallway serving as a waiting room

A continuous and unobstructed path of travel from any point in a building or structure to a public way

Any device or portion of the equipment used to increase refrigerant pressure

The quantity of refrigerant stored at some point is the refrigeration system for operational, service, or standby purposes.

Secondary refrigerant is a liquid used for the transmission of heat, without a change of state, and having no flash point or a flash point above _____ as determined from ASTM.

A service valve for dual pressure-relief devices that allows using one device while isolating the other from the system, maintaining one valve in operation at all times.

Tubing that is unenclosed and therefore exposed to crushing, abrasion, puncture, or similar damage after installation.

Refers to blends comprising multiple components of different volatile that, when used in refrigeration cycles, change volumetric composition and saturation temperature as they evaporate (boil) or condense at constant pressure.

Is a premises or that of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others

Is one in which a secondary coolant is in direct contact with the air or other substance to be cooled or heated.

Refrigerant number R-744 is

Refrigerant number R-1150 is

Refrigerant R-40 is

When the air duct system serves several enclosed spaces, the permissible quantity of refrigerant in the system shall not exceed the amount determined by using the total volume of those spaces in which the airflow cannot be reduced to less than _____ of its maximum when the fan is operating

The space above a suspended ceiling shall not be included in calculating the permissible quantity of refrigerant in the system unless such space is continuous and is part of the air return system

Which of the following is not a possible location of service valve?

A coil in series with evaporator that is use to prevent the liquid refrigerant entering the compressor

A type of valve connected from discharge of compressor directly to suction that is normally closed and will open automatically only if there is high discharge pressure

Use to increase the capacity of condenser

Is use to subcooled the refrigerant from the condenser

Which of the following is NOT a part of low pressure side in refrigeration system?

Which of the following is NOT a part of high pressure side in refrigeration system?

Which of the following is NOT a part of condensing unit?

By subcooling the refrigerant in refrigeration system, the compressor power per unit mass will

Superheating the refrigerant in refrigeration system without useful cooling, the refrigeration effect per unit mass will

By subcooling the refrigerant in refrigeration system, the specific volume at compressor suction will

Pressure loss due to friction at the condenser, the compressor power per unit mass will

Which of the following is NOT a type of air-cooled condenser?

A type of refrigerant control typically used refrigeration

Type of condenser that operates like a cooling water

The major problem of heat pump is

Dominant refrigerant used in commercial refrigeration system

Cascade refrigerant system are connected in

Is use to heat up the solution partially before entering the generator in absorption refrigeration system

The COP of actual absorption refrigeration system is usually

Sight glass is often located at

Use to detects a vibration in current caused by the ionization of decomposed refrigerant between two opposite charged platinum electrodes

The ability of oil to mix with refrigerants

Joints and all refrigerants-containing parts of a refrigerating system located in an air duct carrying conditioned air to and from an occupied space shall be constructed to withstand a temperature of _____ without leakage into the airstream.

Refrigerant piping crossing an open space that affords passageway in any building shall be not loss than _____ above the floor unless the piping is located against the ceiling of such space and is permitted by the authority having jurisdiction

Methyl chloride shall not be in contact with

Shall not be in contact with any halogenated refrigerants

Are suitable for use in ammonia system

In a pressure-relief device is used to protect a pressure vessel having an inside dimension of 6 in or less, the ultimate strength of the pressure vessel so protected shall be sufficient to withstand a pressure at least _____ the design pressure

Seats and discs shall be limited in distortion, by pressure or other cause, to set pressure change of not more than _____ in a span of five years.

Liquid receivers, if used or parts of a system designed to receive the refrigerant change during pumpdown charge. The liquid shall not occupy more than _____ of the volume when temperature of the refrigerant is 90 F

The discharge line (B4) shall be vented to the atmosphere through a _____ fitted to its upper extremity.

Convert fossil fuels into the shaft work

Ultimate strength drops by 30% as steam temperature raises from _____ for unalloyed steel

Recent practice limits steam temperature to

In a closed feed water heater, the feed water pass through

Is use if extracted steam upon condensation gets subcooled

Needs only single pump regardless of number of heaters

Is also known as deaerator

Dissolve gases like _____ makes water corrosive react with metal to form iron oxide

Suction line oil traps should be installed when the condenser is

When using nitrogen for brazing, the pressure should be

What is the leaving chilled water set point for water chiller systems?

A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?

A High-Probablity system

What kind of system uses two different refrigerants in separate systems dependent on each other?

A trap on the suction line would be needed if

Liquid refrigerant R-22 enters an evaporator at 50.2 psig, 20 F and leaves 37 F, its pressure as it leaves will be

What type of material can’t be used on the outlet of a relief valve?

Sublimation occurs when

What is the minimum height refrigeration piping should be placed against walls?

According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

What type of fuses must be used on a HVAC system?

The purpose of a receiver is

Evaporators located _____ inches of a heating coil shall be equipped whit a pressure relief device.

Cooling tower lowers condenser water temp by

The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

In an air conditioning system, the unit of total heat energy content in an air/vapor mixture is

Pipe identification labels are required when the system contains more than

A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed _____ lb in the occupied areas and machinery rooms of institutional occupancies.

Low pressure chiller systems use what type of compressor?

Pressure relief devices are marked with a _____ signifying compliance with the ASME Boiler & Pressure Vessel Code.

What type of copper is not permitted on refrigeration systems?

No open flames are allowed in the machinery room unless?

If your suction line is warmer than the room temperature, this may indicate

R-22 is considered a(n)