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Dry chemical fire extinguishers are effective on which type(s) of fire?()
A . Burning oil
B . Electrical
C . Paint
D . All of the above
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Halon fire extinguishers are NOT effective when used on which types of fires?()
A . Fires in electrical equipment
B . Flammable oils and greases
C . Class A fires in ordinary combustibles
D . Materials containing their own oxyge
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Which of the listed classes of fire would most likely occur in the engine room of a vessel?()
A . Classes A and B
B . Classes B and C
C . Classes C and D
D . Classes A and D
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In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links()。
A . 255.255.255.0
B . 255.255.255.240
C . 255.255.255.248
D . 255.255.255.252
E . 255.255.255.254
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In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links? ()
A . 255.255.255.0
B . 255.255.255.240
C . 255.255.255.248
D . 255.255.255.252
E . 255.255.255.254
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In the implementation of VLSM techniques on a network using a single Class C IP address,which subnetmask is the most efficient for point-to-point serial links?()
A . 255.255.255.240
B . 255.255.255.254
C . 255.255.255.252
D . 255.255.255.0
E . 255.255.255.248
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Halon extinguishers used on a class C fire should be directed at the().
A . base of the equipment
B . top of the equipment
C . power source
D . source of the fire
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Click the Exhibit button. Given:Which statement is true if a TestException is thrown on line 3 of class B? ()https://assets.asklib.com/images/image2/2018080209451430879.jpg
A . Line 33 must be called within a try block.
B . The exception thrown by method1 in class A is not required to be caught.
C . The method declared on line 31 must be declared to throw a RuntimeException.
D . On line 5 of class A, the call to method2 of class B does not need to be placed in a try/catch block.
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Which of the listed classes of fire is considered as one involving electrical equipment?()
A . Class "A"
B . Class "B"
C . Class "C"
D . Class "D"
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Which firefighting method is an example of an indirect attack on a fire?().
A . Bouncing a straight stream of water off the overhead to create spray effect
B . Spraying foam on a bulkhead and letting it flow down and over a pool of burning oil
C . Flooding a paint locker with CO
and sealing the compartment
D . Cooling adjacent bulkheads with water to prevent the spread of the fire by conductio
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Which of the listed materials would be considered as a bunting class "C" fire?()
A . Fuel oil
B . Wood
C . Celluloid
D . Electrical insulatio
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Which of the listed burning materials would be described as a class "B" fire?()
A . Acetylene
B . Lube oil
C . Grease
D . All of the above
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Click the Exhibit button
https://assets.asklib.com/images/image2/2018080116170383293.png
Which two statements are true if a NullPointerException is thrown on line 3 of class C?()
A . The application will crash.
B . The code on line 29 will be executed.
C . The code on line 5 of class A will execute.
D . The code on line 5 of class B will execute.
E . The exception will be propagated back to line 27.
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Which class is used to specify a set of features to support on the XrnlReader object created by the Create method?()
A . XmlReaderSettings
B . XmlSecureResolver
C . XmlValidatingReader
D . XmlTextReaderSelectMany(c => c.CustomerAddresses).Count()
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For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent ().
A . Class "A" and class "B"
B . Class "B" and class "C"
C . Class "A" and class " C"
D . Class "C", class "D", and class "E"
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If ignited, which of the listed materials would be a class "B" fire?()
A . Magnesium
B . Paper
C . Wood
D . Diesel Oil
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Burning diesel oil should be treated as which class of fire?()
A . Class "A"
B . Class "B"
C . Class "C"
D . Class "D"
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Which portable fire extinguisher should be used on a class C fire on board a vessel?()
A . Carbon dioxide
B . Water (stored pressure)
C . Foam
D . Carbon tetrachloride
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Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire?
A.CO2
B.ABC dry chemical
C.CO2 propelled foam
D.All of the above
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Click the Exhibit button. Given:Which two statements are true if a NullPointerException is thrown on line 3 of class C? ()
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/900591de4611848eaa661230b23f7c01.jpg' />
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/096a8f1a86972212e5c4d4c53f88ec71.jpg' />
A.The application will crash.
B.The code on line 29 will be executed.
C.The code on line 5 of class A will execute.
D.The code on line 5 of class B will execute.
E.The exception will be propagated back to line 27.
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Which of the following has the least effect on the effectiveness of questions in classes?
A、students`language proficiency
B、the number of students
C、wait-time allowed after a question
D、feedback given to students after they answer the questions
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Fires rely on , , and , the three components of what fire crews refer to as “the fire triangle.”
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to develop the skill of listening for specification information,the teacher asks students to fill in the blanks with the information they hear on the tape.which stage of listening class is it at now______.
A、None of the above.
B、Pre-listening.
C、Post-listening.
D、While-listening.