Blue Book Terms

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.

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 deg F

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 deg C

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 3 deg  C 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 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 ________ to complete  one cycle.

Binary geothermal plant

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

Safety valve

Is the most important safety device on the power  boiler.

Removed

During hydrostatic test, the safety valves should be:

197 deg C

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 deg C

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 design 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 Otto cycle is:

Isothermal

If joule Thomson coefficient is equal to zero, then the  process will become:

Remains the same

If the fluid passed through a nozzle its entropy will:

Blends

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

Campanion 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 passage way that limits travel to a single  path.

30 min

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.

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 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 times.

Protected 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 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 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 NOT 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 water:

Frosting

The major problem of heat pump is:

R502

Dominant refrigerant used in commercial refrigeration system:

Series

Cascade refrigerant 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:

700F

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 loss than ______  above the floor unless the piping is located against the  ceiling of such space and is permitted by the authority  having jurisdiction.

All of these

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

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.

5%

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.

90%

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 90F.

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 the shaft work:

400 to 500 c

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

 438 c

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:

Open heater

Is also known as deaerator:

O₂ and CO₂

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