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WorksheetsPIPE TERMS REVIEW 1
Total questions: 70
Worksheet time: 35mins
Heat loss that is inherent in a boiler is due to:
excess air
dry chimney gases
unburned gaseous combustible
radiation from the furnace setting
Water behind the dam at the plant
storage
reservoir
pondage
spillwater
Receivers must be:
vented to the atmosphere
tilted to the feed pumps
installed with safety valve
installed at least 10 ft higher than feed pumps
Scale in boiler can
inhibit circulation and heat transfer
cause foaming
create impure steam quality
overheat blow off line
Flame detector verifies
incomplete combustion
visible light
visible flame only
ultraviolet and or infrared energy
In a low speed engine, which of the following may cause black smoky exhaust
too heavy oil
too much lubricating oil
too high fuel pressure
too light fuel
Volumetric efficiency of well-designed engine may be in the range
75 to 90%
65 to 75%
30 to 50%
below 30%
Term not used in relation to lube oils
Cetane No.
Condarson Carbon
Neutralization No.
Demulsibility
The thermodynamic cycle used in a thermal plant is
Ericsson
Brayton
Joule
Rankine
A graphical representation between discharge and time is known as:
hectograph
monograph
hydrograph
topograph
Part of the Capacity of a hydraulic plant available at all times when energy is needed
firm power
spinning reserve
primary power
secondary power
What is the process whereby a fissionable species is utilized as a source of neutrons to produce a more nuclei of its own kind than are used up?
Developing
Culturing
Multiplying
Breeding
The principal disadvantage of fire tube boilers is
uncontrollable output steam temperature
uses too much fuel
contains too large volume of water and requires too long time interval raise temperature
only wet steam is generated
What do you call the changing of atom of an element into an atom of a different element with a different atomic mass?
atomization
atomic transmutation
atomic pile
atomic energy
What is the function of a radiation pyrometer?
boiler water weight
boiler pressure
furnace temperature
boiler drum pressure
How do you differentiate sure from water hammer?
Time for pressure to transverse the pipe
The pressure of reservoir at the end of the pipe
Rate of decelaration of flow
Relative compressibility of liquid to expansion
An accessory often installed on modern boilers to heat combustion of air before it enters the boiler furnace
economizer
air heater
reheater
forced draft fan
Which of the following is a psychical property of lubricating oil
Cetane number
Viscosity index
Aniline point
Octane Number
What characterizes a reaction turbine?
steam loses velocity as it leaves the diaphragm
steam strikes the blades at right angles
steam will react with a force in a diaphragm
steam is deflected
For the same heat input and same compression ratio
Both Otto cycle and Diesel cycle are equally efficient
Otto cycle is less efficient if compared to Diesel Cycle
Efficiency depends namely on working substance
None of the above is correct
An automobile heats up while sitting in a parking lot on a sunny day. The process can be assumed to be:
isothermal
isobaric
isometric
isentropic
The primary effect of reheating is to
increase the efficiency
decrease the pump work
decrease the heat requirement
decrease or eliminate moisture condensation in the turbine
The prime purpose of viscositing a lubricating oil pre-heater in an emergency standby diesel generating unit
to keep the oil viscosity down under cold condition and enhance the starting cold engine
to avoid moisture condensation in the engine
to avoid corrosion to engine parts
to see to it that the lubricating system is functioning properly
What is the minimum pressure to be considered as mechanical equipment?
Less than 70 kPa
60 kPa
40 kPa
70 kPa
What is the color of a pipe carrying steam?
Silver-Grey
Green
Red
Blue
Check valve is used
to allow only one direction of flow
to regulate the flow
to serve as service valve
to throttle gas, steam, or liquid
An instrument commonly used in most Research and Engineering Laboratories because it is small and fast among the other thermometers:
mercury thermometer
liquid - in - glass thermometer
gas thermometer
thermocouple
The ratio of the average load to the peak load over a designated period of time is called:
Load factor
Operation Factor
Capacity factor
Diversity factor
Vapor lock is
Lack of vaporization of fuel to atmospheric pressure
Excess fuel supply to engine because of faster evaporation
Complete or partial stoppage of fuel supply of vaporization of fuel in the supply line.
Locking carburetor jets because of vapor pressure
Detonation of pinging noise is due to
Early timing of fuel injection
Late timing of fuel injection
Clogging of air cleanser
Low injection pressure
Total solid impurities in feed water for a boiler depend upon
Boiler pressure
Quantity of stem to be generated
Type of fuel
Quantity of steam
What is the function of compression join of pipes or tubes?
it is used to connect two pipes by welding
it is used to connect two pipes by pressing both ends
when tightened, compress tapered sleeves so that they form a tight joint on the periphery of the tubings they connect
it connects two pipes with the use of threaded couplings
The mean effective pressure of a diesel cycle having fixed compression ratio will increase if cut-off ratio is
Increased
Decreased
Independent of compression ratio
Depends on other factor
Otto cycle consists of
Two isentropics and two isometric processes
Two isentropics and two isobaric processes
Two adiabatic and two isothermal
Two isothermal and two isometric processes
This therm refers to controlled device which can stop at any point in its stroke and can be reverted without completing ist stroke.
modulating means
throttling range
control point shift
floating action
One of the most important qualifications for PME that he is competent to practice as attested by at least
Two RME
One PME
One CPM
Two PME
A Francis Turbine has what flow
inward flow direction
outward flow impulse
outward flow reaction
inward flow impulse
A type of water turbine
Parson
Hero
Pelton
Banki
If the pressure of the confined gas is constant, the volume is directly proportional to the absolute exhaust manifold:
backlash
backfire
exhaust pressure
back pressure
Ignition of the air fuel mixture in the intake of the exhaust manifold:
backlash
backfire
exhaust pressure
back pressure
Number of molecules in a mole of any substance is a constant called:
Rankine cycle
Avogadro's number
Otto cycle
Thompson constant
A simultaneous generation of electricity and steam (or heat) in a simple power plant:
gas turbine
steam turbine - gas turbine plant
waste heat reconvery
cogeneration
The internal combustion engines never work _____ cycle:
Rankine
Diesel
Dual Combustion
Otto
Type of turbine that has high pressure and low pressure is called
compound engine
gas turbine
impulse turbine
compound turbine
Which is used as a moderator in certain types of nuclear reactors?
vapor
heavy water
hot water
cold water
What is a Bull Head Tee?
a pipe tee with head shaped like a bull
a welded built-up tee
a pipe tee with its run larger than its branch
a pipe tee the branch of which is larger than the run
What is the term as the ratio of the volume at the end of heat addition to the volume at the start of head addition?
compression ratio
air-fuel ratio
volumetric ratio
cut-off ratio
What is the ideal cycle gas turbine work?
Brayton cycle
Stag combined cycle
Bottom cycle
Ericson cycle
What do you call the passing heat energy from molecule to molecule through a substance?
conduction
radiation
conservation
convection
The indicator used to determine the anti-knock characteristics of gasoline:
Aniline point
Cetane No.
Octane No.
Diesel Index
_____ is the number of elementary entities in one mole of a substance.
Molecular Weight
Molar Mass
Diffusion constant
Avogadro constant
Diesel engine fuels are rated by:
CFR number
Cetane number
Octane number
Calorific number
The determination of percentage by weight of carbon, hydrogen, oxygen, nitrogen, sulfur, and ash in the fuel is called:
pyroximate analysis
gravimetric analysis
ultimate analysis
calorific analysis
Load curve refers to the plot of
Load versus generating capacity
Load versus current
Load versus time
Load versus efficiency
Fast breeder reactors can be used to produce _____ fissile material than they consume.
more
less
equal
none of these
It is the generating capacity that is connected to the bus and ready to take load
cold reserve
hot reserve
spinning reserve
generating reserve
Boiler tube sizes are specified by:
pipe size
standard ASME size
inside diameter
outside diameter
Hydronic heat is
steam heat
hot water heat
radiant heat
heat of evaporation
On what plane is the Mollier diagram plotted?
P-V
P-T
h-s
T-s
At what pressure is the latent heat of vaporization zero?
22.123 MPa
26.062 MPa
15.082 MPa
101.32 MPa
The boiling point of a liquid caused by a decrease in pressure rather than an increase in temperature is called:
Ignition
Capillary action
Cavitation
Evaporation
Valve designed to open automatically to relieve excess pressure:
check valve
excess valve
relief valve
blow-off valve
The energy content per unit mass (or volume) of a fuel released in combustion is called
Specific heat
thermal inertia
calorific value
None of these
Water tube boilers have:
one fusible plug
no fusible plugs
two fusible plugs
None of the above
How many feedwater lines are connected to the boiler?
one
two
three
four
One of the main purposes of refractories in a boiler furnace is to:
help preheat the air for the furnaces
help preheat the feedwater
protect the economizer from excessive furnace heat losses
prevent excessive furnace heat losses
All fuel-oil tanks are ventured through a:
check vent to the setting tanks
gooseneck vent
check valve to the transfer pump
gooseneck vent which discharges to the settlers
The presence of oil or scale on boiler tubes causes:
overheating
oxidation
electrolysis
galvanic action
To change the firing rate of a boiler:
open the recirculating valve
change the size of the burner tips
start the second fuel-oil service pump
close the recirculating valve
"Cyclone separators" are located in the:
furnace
steam-and water-drum
feed system
fuel-oil line
