PIPE Terms for Sparta

Rotary dryer

Is the most common dryer used which consist of rotating cylinder inside which the materials flow while getting in contact with hot gas.

WB temperature

The total heat of the air is a function of

Relative humidity

Is the ratio of the mass of water-vapor in air and the mass of air if it is saturated is called:

10 deg C

The hands feel painfully cold when the skin temperature reaches

Water

The refrigerant used in steam jet cooling is:

WB temperature

The total heat of the air is a function of

21 oF

Boiling point of Freon-12 at atmospheric pressure is:

Double shell

Which of the following is NOT a type of water cooled condenser in refrigeration?

Absorber

Component of absorption refrigeration system in which the solution is cooled by cooling water.

-46 oC

Cascade refrigeration cycle is often used in industrial process where objects must be cooled to temperature below:

Capillary tube

Type of refrigerant control designed to maintain a pressure difference while the compressor is operating.

1 percent

As a rule of thumb, for a specified amount of compressed air, the power consumption of the compressor decreases by \__________ for each SoC drop in the temperature inlet air to the compressor.

Acoustic leak detector

Modern way of detecting air compressor leak is by using

Wind movement

For foundation of stacks, the maximum pressure on the soil is equal to the pressure due to the weight and the \_________.

3 times the diameter of anchor bolt

Foundation bolts of specified size should be used and surrounded by a pipe sleeve with an inside diameter of at least

decrease

For multi stage compression of an ideal Brayton cycle, the back work ratio will

Impulse turbine

Type of turbine that has a specific speed below 5.

Propeller turbine

A high discharge type of turbine

jet deflector

Use to minimize the speed rise due to a sudden load rejection

unit speed

Is the speed of a turbine when the head on the turbine is one meter.

Cohesion

Is a fluid property which refers to the intermolecular attraction by which the separate particles of the fluid arc held together.

high compression pressure

Which of the following is NOT the cause of black smoke in diesel engine?

Using another generator

Which of the following is not a method of starting a diesel engine?

compression and power stroke

Two-stroke engine performs one cycle.

Binary geothermal plant

A type of geothermal plant used when there is a presence of brine extracted from underground

Safety valve

Is the most important safety device on the power boiler.

removed

During hydrostatic test, the safety valves should be

197 OC

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

Exothermic reaction

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

increase

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

increase

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

620 oC

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

Hydrogen and helium

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

11 to 16

In most common designs of Gas turbine, the pressure ratio ranges from

isobaric process

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

approaches TDC

The fuel injection process in diesel engine starts when the piston\_________.

decrease

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

liquid

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

8

Typical compression ratio of Otte cycle is

isothermal

If Joule Thompson coefficient is equal to zero, then the process will become

remains the same

If the fluid passed through a nozzle its entropy will:

blends

Refrigerants consisting of mixtures of two or more different chemical compounds, often used individually as refrigerants for other applications.

Companion valve

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

corridor

An enclosed passageway that limits travel to a single path.

30 minutes

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.

open heater

Is also known as deaerator.

internal gross volume

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

lobby

A waiting room or large hallway serving as a waiting room.

mean of aggress

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

pressure-imposing element

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

pumpdown charge

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

150 deg F

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.

three-way valve

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 tines.

unprotected tubing

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

zeotropic

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.

Institutional occupancy

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

Indirect open spray system

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

Carbon dioxide

Refrigerant number R- 744 is:

Ethene

Refrigerant number R-1150 is:

Chloromethane

Refrigerant number R-40 is:

one-quarter

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.

Plenums

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.

outlet of condenser

Which of the following is NOT a possible location of service valve

Drier loop

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

solenoid valve

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.

desuperheating coils

Use to increase the capacity of condenser.

liquid subcooler

Is use to subcooled the refrigerant from the condenser.

liquid line

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

suction line

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

liquid line

Which of the following is WOT a part of condensing unit?

remains the same

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

remains the same

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

remains the same

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

remains the same

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

shell and tube

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

Capillary tube

A type of refrigerant control typically used in household refrigeration.

evaporative condenser

Type of condenser that operates like a cooling tower.

frosting

The major problem of heat pump is

R-502

Dominant refrigerant used in commercial refrigeration system.

series

Cascade refrigeration system are connected in

regenerator

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

less than 1

The COP of actual absorption refrigeration system is usually

liquid line

Sight glass is often located at:

Electronic detector

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

miscibility

The ability of oil to mix with refrigerants

700oF

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.

2.2 m

Refrigerant piping crossing an open space that affords passageway in any building shall be not less than \_______ above the floor unless the piping is located against the ailing of such space and is permitted by the authority having jurisdiction.

All of these (aluminum, zinc, magnesium)

Methyl chloride shall not be in contact with

magnesium

Shall not be in contact with any halogenated refrigerants.

aluminum and its alloy

Are suitable for use in ammonia system.

3 times

f 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.

5%

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

90%

Liquid receivers, if used, or parts of a system designed to receive the refrigerant charge during pump down charge. The liquid shall not occupy more than \______ of the volume when temperature of the refrigerant is 90oF.

diffuser

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

Thermal power plant

Convert fossil fuels into shaft work.

400 to 500 oC

Ultimate strength drops by 30% as steam temperature raises from \_______ for unalloyed steel.

438 oC

Recent practice limits steam temperature to

inside the tube

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

drain cooler

Is use if extracted steam upon condensation gets subcooled.

closed heater

Needs only single pump regardless of number of heaters.