PIPE ELEMENTS II

D. 1 : 2 : 4

Foundations are preferably built of concrete in the proportion of what measure of Portland cement: sand : crushed stones?

A. 1 : 2 : 5
B. 2 : 4 : 6
C. 2 : 3 : 5
D. 1 : 2 : 4

D. below the foundation top

For design stability, the center of gravity of the total combined engine, driven equipment and foundation should be kept \______

A. anywhere
B. above the foundation top
C. in line with surface of the foundation
D. below the foundation top

B. 5

The machine foundation must have a factor of safety of

A. 4
B. 5
C. 6
D. 7

A. 4,890 kg/cm^2

The diesel engine foundation safe soil bearing pressure is:

A. 4,890 kg/cm^2
B. 4,500 kg/cm^2
C. 4,490 kg/cm^2
D. 4,125 kg/cm^2

C. 30

Anchor bolts in a machine foundation should be embedded in concrete of at least how many times of the bolt diameter?

A. 15
B. 20
C. 30
D. 25

B. 3.2 to 4.2

As a good practical rule, the foundation depth may be taken as how many times of the engine stroke?

A. 2.2 to 3.2
B. 3.2 to 4.2
C. 2.5 to 3.5
D. 3.5 to 4.5

A. 120 mm to 300 mm

To secure the belts embedded within the foundation, the distance of the edges of the foundation from the bedplate must be

A. 120 mm to 300 mm
B. 150 mm to 330 mm
C. 100 mm to 280 mm
D. 200 mm to 380 mm

B. 3 to 5 times

The weight of the machine foundation is how many times of the weight of the engine?

A. 4 to 5 times
B. 3 to 5 times
C. 2 to 3 times
D. 4 to 6 times

C. 25

To eliminate transmission of vibration, the foundation should be isolated from floor slabs or building footings at least how many mm around its perimeter?

A. 15
B. 20
C. 25
D. 30

D. 120 mm

The minimum vertical distance from the floor or soil level to the top edge of the foundation must be around \_______

A. 150 mm
B. 100 mm
C. 200 mm
D. 120 mm

A. below the foundations top

For stability, the total combined engine, driven equipment, and foundation center of gravity must be kept \_______

A. below the foundations top
B. above the foundations top
C. 120 mm above the foundations top
D. none of the above

A. 12 mm in diameter

There shall be no foundation bolts less than \______

A. 12 mm in diameter
B. 16 mm in diameter
C. 18 mm in diameter
D. 20 mm in diameter

A. 1/2 % to 1 %

The weight of steel bar reinforcements should be how many times the weight of the foundation?

A. 1/2 % to 1 %
B. 1 % to 1.5 %
C. 3 % to 5 %
D. 3.2 % to 4.2 %

B. thermal cracking

Concrete foundation should have steel bar reinforcements placed vertically and horizontally to avoid \________

A. breaking
B. thermal cracking
C. melting
D. vibration

B. 18 times

Foundations bolt length should be at least how many times the anchor bolt diameter?

A. 16 times
B. 18 times
C. 20 times
D. 30 times

A. 3

Foundation bolts of specified size should be used and surrounded by a pipe sleeve with an inside diameter of at least how many times the diameter of the anchor bolt?

A. 3
B. 4
C. 5
D. 6

A. one time

For a diesel engine's foundation, in pouring a concrete mixture, it should be poured:

A. one time
B. two times
C. three times
D. four times

A. 1:2:4

For foundations of steam turbine, the conrete mixture should be \____

A. 1:2:4
B. 1:3:5
C. 1:2:3
D. 1:3:4

C. 25

The steam turbine foundation should be designed to support the machine load plus how many percent for impact, condenser load, floor loads and dead loads?

A. 15
B. 20
C. 25
D. 30

C. Induced draft

Which of the following draft rely on the stack effect to draw off combustion gases?

A. Natural draft
B. Forced draft
C. Induced draft
D. Balanced draft

B. Forced draft

Fans located before the furnace that are used to apply air for burning

A. Natural draft
B. Forced draft
C. Induced draft
D. Balanced draft

A. 1200 to 1800 rpm

Forced draft fans are run at relatively high speeds in the range of:

A. 1200 to 1800 rpm
B. 1000 to 1600 rpm
C. 1500 to 2000 rpm
D. 900 to 1500 rpm

B. gravity chimney

Chimneys that rely on natural draft are sometimes referred to as

A. natural chimney
B. gravity chimney
C. normal chimney
D. stack

A. 0.5 to 2.5 kPa

Force draft fans create a positive pressure of:

A. 0.5 to 2.5 kPa
B. 1.0 to 3.0 kPa
C. 2.0 to 4.0 kPa
D. 0.2 to 2.2 kPa

C. Induced draft

Fans that are used to draw combustion products through the furnace bed, stack, and pollution control system by injecting air into the stack after combustion

A. Natural draft
B. Forced draft
C. Induced draft
D. Balanced draft

D. Balanced draft

The term used when the static pressure is equal to the atmospheric pressure

A. Natural draft
B. Forced draft
C. Induced draft
D. Balanced draft

A. negative pressure

In order to keep combustion products inside the combustion chamber and stack system, balanced draft system may actually operate with a slight

A. negative pressure
B. positive pressure
C. positive and negative pressure
D. absolute pressure

A. draft loss

The static pressure drop due to friction through the boiler and stack

A. draft loss
B. available draft
C. stack effect
D. fan boost

B. available draft

The difference between the theoretical draft and the draft loss

A. draft loss
B. available draft
C. stack effect
D. fan boost

B. zero

In a balanced system, the available draft is:

A. unity
B. zero
C. 100
D. infinite

A. net rating or fan boost

The total pressure supplied by the fan at maximum operating conditions

A. net rating or fan boost
B. draft loss
C. available draft
D. stack effect

B. the greater the stack effect

Generally the higher the chimney

A. the smaller the stack effect
B. the greater the stack effect
C. stack effect is zero
D. stack effect approaches unity

A. 60 m

Modern stacks are seldom built higher than

A. 60 m
B. 50 m
C. 40 m
D. 30 m

D. 30 m

Most stacks are built of height less than:

A. 60 m
B. 50 m
C. 40 m
D. 30 m

C. the temperature halfway up the stack

The average flue gas temperature is

A. the temperature entering the stack
B. the temperature leaving the stack
C. the temperature halfway up the stack
D. the sum of the temperatures

A. 0.30 to 0.50

The coefficient of velocity is approximately

A. 0.30 to 0.50
B. 0.40 to 0.60
C. 0.20 to 0.40
D. 0.50 to 0.70

B. 80 % of the ideal

For realistic problems, the achievable stack effect probably should be considered to be:

A. 75 % of the ideal
B. 80 % of the ideal
C. equal to the ideal
D. half the ideal

A. 1.83 m in diameter

Guyed stacks seldom exceed:

A. 1.83 m in diameter
B. 2.83 m in diameter
C. 1.45 m in diameter
D. 2.45 m in diameter

C. 60 degrees

The angle between the stack and the guy wire is usually:

A. 30 degrees
B. 45 degrees
C. 60 degrees
D. 75 degrees

A. 30.48 m

Guyed stacks height seldom exceed

A. 30.48 m
B. 34.80 m
C. 43.80 m
D. 48.30 m

A. 17.62 kg/cm^2

The maximum unit pressure of turbine and generator on the reinforced concrete should not exceed

A. 17.62 kg/cm^2
B. 18.62 kg/cm^2
C. 16.62 kg/cm^2
D. 19.62 kg/cm^2

A. 25 mm

Foundations should be isolated from floor slabs or building footings by at least how many mm to eliminate transmission of vibration

A. 25 mm
B. 15 mm
C. 35 mm
D. 45 mm

B. thermal cracking

Concrete foundations should have steel bar reinforcements placed both vertically and horizontally to avoid

A. vibrations
B. thermal cracking
C. breakdown
D. rupture

A. 18

Foundation bolts of specified size should be used and surrounded by a pipe sleeve with a length of at least how many times the diameter of the bolt?

A. 18
B. 14
C. 15
D. 16

A. 25

Foundation should be designed to support the machine load plus how many percent for impact, condenser load, floor loads, and dead loads?

A. 25
B. 34
C. 15
D. 36

A. 120 deg.

In guyed steel stacks, the angle between wires in a set of three is:

A. 120 deg.
B. 110 deg.
C. 135 deg.
D. 145 deg.

A. 1 to 3

Guys are usually applied in how many sets?

A. 1 to 3
B. 2 to 4
C. 3 to 5
D. 4 to 6

A. 0.11

The empirical coefficient e in machine foundation if not given is assumed

A. 0.11
B. 0.25
C. 0.32
D. 0.15

C. Induced draft

The term suction units is used with

A. Natural draft
B. Forced draft
C. Induced draft
D. Balanced draft

B. Atmometer

An instrument used for measuring evaporation, generally that of water, into the atmosphere

A. Aerometer
B. Atmometer
C. Anemometer
D. Fadometer

A. Fadometer

An instrument for testing the resistance of materials to fading when they are exposed to artificial sunlight or ultraviolet light under controlled conditions

A. Fadometer
B. Fulgurator
C. Odometer
D. Atmometer

A. ice calorimeter

The type of calorimeter in which the specific heat of a specimen is measured by the quantity of ice it melts is the:

A. ice calorimeter
B. heat calorimeter
C. vapor calorimeter
D. hysometer

B. Hysometer

An instrument used for determination of the boiling point of water for estimating the altitude above sea level from its known variation with atmospheric pressure

A. Vapor calorimeter
B. Hysometer
C. Boiler
D. Vapor bomb

C. Joule

A unit of work or energy equal to 10^7 ergs. It is equivalent to the work done by a force of one Newton acting through a distance of one meter

A. Btu
B. Calorie
C. Joule
D. Watt

C. Isotron

An electromagnetic device for separating isotopes by electrical sorting of their ions

A. Ion sorter
B. Isotope sorter
C. Isotron
D. Jolly balance

D. Jolly balance

A device used for the determination of the specific gravity of a substance by weighing it in air and in water

A. Kelvin balance
B. Spring balance
C. Hysometer
D. Jolly balance

D. Velometer

Which of the following instruments is NOT used to measure flow rates?

A. Anemometer
B. Rotameter
C. Flowmeter
D. Velometer

D. steam calorimeter

An instrument used to measure the quality of steam is the:

A. psychrometer
B. gas calorimeter
C. pyrometer
D. steam calorimeter

A. aerovane

An instrument used to measure the density of gases is known as:

A. aerovane
B. aerometer
C. hygrometer
D. atmometer

D. Aerator

Which of the following is the apparatus used for mixing air with other fluids?

A. Carburetor
B. Dehydrator
C. Gas mixer
D. Aerator

B. air nozzle

A device that supplies air to an air - injection system is called:

A. air pump
B. air nozzle
C. gas scrubber
D. air injector

B. Flowmeter

An instrument used for measuring pressure, flow velocity and discharge rate of a fluid flowing in a conduit

A. Kampometer
B. Flowmeter
C. Pitot tube
D. Katharometer

A. Kampometer

An instrument used for measuring radiant energy especially in the thermal region

A. Kampometer
B. Luxmeter
C. Kapnometer
D. Katharometer

D. Katharometer

An instrument for the determination of the composition of the gas mixture by measuring variations in the thermal conductivity

A. Kampometer
B. Atmometer
C. Kapnometer
D. Katharometer

B. Tensiometer

An apparatus used for measuring the surface tension of a liquid by recording the force necessary to detach a metal ring from the surface

A. Tachometer
B. Tensiometer
C. Odometer
D. Telemeter

D. Telemeter

An instrument used for measuring various quantities

A. Tachometer
B. Odometer
C. DME
D. Telemeter

B. Tensimeter

An apparatus used for determination of the transition point by measuring the temperature at which the vapor pressure of the two modifications become equal

A. Tensiometer
B. Tensimeter
C. Tachometer
D. Bourdon gage

A. Tachometer

An instrument for measuring the revolutions per minute of a rotating shaft

A. Tachometer
B. Odometer
C. All of the choices
D. Speedometer

C. Ice bomb

A device used for demonstrating the extreme force exerted by water when if freezes is called:

A. Ice calorimeter
B. Hysometer
C. Ice bomb
D. Freezer

D. Cathetometer

A device to measure vertical distances or displacements?

A. Kampometer
B. Kapnometer
C. Altimeter
D. Cathetometer

B. Chronoscope

A precision instrument for measuring very short time intervals

A. Clinometer
B. Chronoscope
C. Stop watch
D. Decremeter

C. Engler distillation

Which of the following is a laboratory method for the determination of the boiling range of petroleum?

A. Jolly balance
B. Kelvin balance
C. Engler distillation
D. Fractional distillation

A. Hygrometer

An instrument used to measure the humidity in the air

A. Hygrometer
B. Hydrometer
C. Pressure guage
D. Wind vane

B. Hydrometer

An instrument used to measure the specific gravity or relative density of liquids

A. Hygrometer
B. Hydrometer
C. U - tube
D. Manometer

C. Kapnometer

An apparatus used for the determination of the concentration of solid or liquid particles dispersed in a gas, such as the density of smoke or fog

A. Kampometer
B. Atmometer
C. Kapnometer
D. Katharometer

A. specific gravity of liquids

Hydrometer is used to find out:

A. specific gravity of liquids
B. specific gravity of solids
C. specific gravity of gases
D. relative humidity

D. Hygrograph

What is the clockwork operated device which records continuously the humidity of the atmosphere?

A. Hetrograph
B. Hygrometer
C. Hygrodeik
D. Hygrograph

A. Relay

A device whose function is to pass an information in an unchanged form or in some modified form

A. Relay
B. Sensor
C. Transmitter
D. Transducer

B. Transducer

A general term for a device that receives information in the form of one or more physical quantities, modifies the information and or its form if required and produces a resultant output signal

A. Converter
B. Transducer
C. Sensor
D. Scanner

C. steam cylinder pressure

An engine indicator is generally used to measure what?

A. steam temperature
B. heat loss
C. steam cylinder pressure
D. gauge reading errors

A. Rotameter

In the processing section, there is an instrument frequently used to measure the flow rate of fluids. What is the instrument consisting of a vertical passage with variable cross-sectional area, a float and a calibrated scale?

A. Rotameter
B. Pitot tube
C. Rota Aire
D. Manometer

A. Trapping the steam and letting water through

What is the function of a steam separator?

A. Trapping the steam and letting water through
B. Throttling
C. Changing direction of the steam flow
D. Steam metering

A. density of brine

A salimeter reads the:

A. density of brine
B. dew point temperature
C. rate of brine
D. relative humidity

A. Salimeter

Which of the following measures the density of salt in the water?

A. Salimeter
B. pitot tube
C. hydrometer
D. odometer

D. none of the above

Ebb current refers to:

A. the eddy current
B. the movement of the tidal current away from shore or down a tidal stream
C. the removal by screen of undesirable fine materials from broken ore
D. none of the above

B. reserve generating capacity that is connected to bus and ready to take load

In power station practice "spinning reverse" is

A. reverse generating capacity that is in operation but not in service
B. reserve generating capacity that is connected to bus and ready to take load
C. reserve generating capacity that is available for service but not in operation
D. capacity of the part of plant remains under maintenance

A. 75 percent

Turnaround efficiency of battery energy storage system is about

A. 75 percent
B. 40 percent
C. 25 percent
D. 80 percent

B. 1500 rpm

Most of the generators in thermal power plants run at:

A. 15000 rpm
B. 1500 rpm
C. 750 rpm
D. 3000 rpm

C. RMS value of voltage

The power supplied to domestic consumers is at 220 volts. This represents:

A. mean value of voltage
B. seak value of voltage
C. RMS value of voltage
D. none of the above

D. Copper

The conductors that are used for transmitting bulk of power at high voltage are of which of the following type?

A. Cadmium copper
B. Galvanized steel
C. Any of the above
D. Copper

A. catenary

When a conductor is suspended between two supports at the same level its shape becomes:

A. catenary
B. cycloid
C. semicircle
D. parabola

D. safe tension is not exceeded

Sag is provided in overhead transmission lines so that:

A. repairs can be carried out easily
B. corona can be reduced
C. skin effect can be reduced
D. safe tension is not exceeded

D. 70.7%

The string efficiency in an AC system is:

A. 50.75%
B. 100%
C. 25.50%
D. 70.7%

A. solar cells

Satellites are powered by:

A. solar cells
B. thermo - electric generators
C. thermionic converters
D. photo - electric cells

C. steam turbines or diesel engine

A ship is powered by:

A. steam turbine
B. diesel engines
C. steam turbines or diesel engine
D. steam turbines, diesel engines, hydraulic turbines or nuclear reactors

A. Diesel engine plant

Which of the following plant is suitable for peak load?

A. Diesel engine plant
B. Steam power plant
C. Nuclear power plant
D. All of the above

D. nuclear power plant

The term 'critical' is associated with power plant of the type:

A. steam power plant
B. diesel engine power plant
C. gas turbine power plant
D. nuclear power plant

B. diesel engine power plant

A turbocharger is a part of:

A. thermal power plant
B. diesel engine power plant
C. hydro - electric power plant
D. nuclear power plant

D. Hydro - electric power plant

Which of the following plant has least pollution problem?

A. Steam power plant
B. Gas turbine power plant
C. Nuclear power plant
D. Hydro - electric power plant

D. Diesel engine power plant

Which of the following power plant can be installed within the shortest time?

A. Nuclear power plant
B. Hydro-electric power plant
C. Gas turbine power plant
D. Diesel engine power plant