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True Power is that portion of apparent power
that is actually dissipated in the load and is measured in watts
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Which one of the following is at a relatively high value when a centrifugal pump operates at shutoff head
Available net positive suction head
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A neutron that possesses the same kinetic energy as its surroundings is called a _______ neutron.
thermal
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The density of seawater is 64.3 ibm per cubic foot. What is the pressure in PSIA 75 feet below the surface of the ocean?
- 48.2.
- 35 feet below sea level is 1 atmosphere or 14.7 PSIA.
- 70 feet would be 2 atmospheres or 29.4
- 75 feet would be 33.5 plus the atmosphere above sea level which is another 14.7
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The main reason for keeping condensate out of the steam lines is to
prevent water/steam hammer
-
To equal the heat transfer capabilities of a counter-flow heat exchanger a parallel flow heat exchanger must
have more heat transfer area
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Which one of the following operations will cause a decrease in available net positive suction head for a centrifugal pump?
throttling open the pump discharge valve.
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Phase of the reactor coolant at the core exit, inside the reactor vessel
subcooled
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During normal plant operation at power a crack in the shell of the main condenser that results in a decreased condenser vacuum.
higher absolute pressure
-
The condition where two phases of a substance coexist at a given temp & pressure is called
Saturated
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Condensate depression is a term that describes the
amount of condensate sub-cooling in the condenser hotwell
-
Mass contained in a unit volume of a substance
density
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Delayed neutron Fraction
# of fission neutrons born as delayed neutrons/# of neutrons born from fission
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An operator should never attempt to manually engage the motor on a motor operated valve whose motor is operating because it might damage the________
Worm gear pinion
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If the pressure sensed by a bourdon tube increases the curvature of the detector will ______ because of the greatest force being applied to the ______ curve of the detector
decrease, outer
-
If the steam pressure input to a density compensated steam flow instrument fails high, the indicated flow rate will__________
increase, because the density input had increased
-
Which one of the following types of radiation upon entering an ion chamber radiation detector will result in the greatest pulse size
Alpha
-
Geiger-Muller tube radiation detector are able to ______
make use of gas amplification
-
The level in an OPEN tank is monitored by a differential pressure transmitter using ambient pressure for a reference. The tank and transmitter are both located within the aux buidling.
If a large exhaust fan is started, lowering the air pressure in the building indicated level will ________
not be affected.
Open tank and open reference would have the same change when the atmosphere changed
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A reactor is classified as subcritical when Keff is _______ and the reactor does not have a self supporting _______
less than 1, chain reaction
-
The purpose of a demineralizerl is to _______
reduce conductivity and corrosion and wear products
-
Ammonia, NH3, is a result of the use of what scavenging agent during reactor operations at high tempatures
Hydrazine
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Which of the following methods is NOT used to remove dissolved oxygen from reactor water
ion exchange
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Which chemical reaction represents the reduction step of the oxidation reduction process
H2O+ + e- >>> H + H2O
-
Gas binding in a centrifugal pump is a condition in which the pump
Volute is filled with steam or air
-
Identify three types of bulk defects commonly found in structural materials
crack, gas space, inclusion
-
The stress at which a pre-determined amount of permanent deformation of a material occurs is called the
Yield Strength
-
Toughness is
The work required to deform one cubic inch of material until it fractures
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