A large oil fire is best extinguished with（）

相似题目

• Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）

  A . Commence draining that tank as quickly as possible B . Seal off all vents to that tank C . Activate the CO system to that tank D . Shut off the steam heating coil

  查看最佳答案

• The longer an oil fire is permitted to burn, the （）.

  A . harder it is to extinguish B . easier it is to extinguish C . less chance there is of re-ignition D . easier it is to control

  查看最佳答案

• A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）

  A、the use of a poor quality oil B、the deterioration of its properties C、the formation of deposits D、the reduction in heat transfer ability

  查看最佳答案

• If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）

  A . Dry chemical B . Halon C . Low velocity fog D . Steam

  查看最佳答案

• Large crosshead type engine generally has two lubrication systems, a function performed only by cylinder oil system is（）

  A . lubricating B . cooling C . sealing D . cleaning

  查看最佳答案

• The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.

  A . secure all openings to the tank B . discharge an initial charge of CO with a hand portable extinguisher C . direct a fire hose into the tank and energize the fire main D . spray the tank boundaries with a fire hose to promote cooling

  查看最佳答案

• The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner（）

  A . in the event of a flame failure B . in the event of a stack fire C . when the water level reach the crown sheet D . when the feed pump discharge pressure drops to a preset minimum

  查看最佳答案

• A large oil fire on the deck of a ship can be fought most effectively with（）.

  A . dry chemical B . foam C . high-velocity fog D . water

  查看最佳答案

• The FIRST step to take in fighting an engine room fire resulting from a ruptured fuel oil service line, is to （）.

  A . evacuate all engine room personnel B . fight the fire with hand portable extinguishers C . activate the main CO bank D . stop the flow of leaking fuel oil

  查看最佳答案

• A fire of escaping liquefied flammable gas is best extinguished by（）.

  A . cooling the gas below the ignition point B . cutting off the supply of oxygen C . stopping the flow of gas D . interrupting the chain reactio

  查看最佳答案

• As for a oil-fired boiler too much air would indicated by （）.

  A . yellowish flame B . golden yellow flame C . milky flame D . brilliant white flame

  查看最佳答案

• Large crosshead type engine generally has two lubrication systems, a function performed only by crankcase oil system is（）

  A . lubricating B . cooling C . cleaning D . neutralizing

  查看最佳答案

• When there is a fire in a large electric motor, normally the very FIRST step is to （）

  A . secure the electric supply B . ventilate area to remove smoke C . start the fire pump and lead out hose D . apply foam

  查看最佳答案

• Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.

  A . fireman's outfit B . low-velocity spray applicator C . marine strainer D . pick axe

  查看最佳答案

• The fire of fuel oil is classified as（） fire.

  A . Class A B . Class B C . Class C D . Class D

  查看最佳答案

• Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.

  A . completely closing the compartment B . closing the compartment except for the ventilators C . leaving the compartment open to the air D . increasing the air flow to the compartment by blower

  查看最佳答案

• The furnace of an oil fired boiler should be （） before the operating burner is lit.

  A . filled with water B . purged C . cleared of air D . None of the above is true

  查看最佳答案

• A DNS server for a large network is experiencing performance problems.  Which of the following options is the best solution to fix the problem？（）

  A . Enable NIS B . Purchase a larger server C . Use /etc/hosts on all of the systems D . Create secondary name servers throughout the network

  查看最佳答案

• As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressure

  A . （1） B . （1）and（2） C . （2） D . neither（1）nor（2）

  查看最佳答案

• If you want to send a marketing e-mail, the best time to send it is _________.

  查看最佳答案

• As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: (1) secure oil to fires; (2) increase feed pump pressure.

  A.(1) B.(1) and (2) C.(2) D.neither (1) nor (2)

  查看最佳答案

• A ________ is based on systematic principles and procedures, i.e., it is an application of views on how a language is best taught and learned.

  A. method B. approach C. technique D. methodology

  查看最佳答案

• From the author's point of view, the best way to prevent oil spills is to get rid of oil completely.

  A．Y B．N C．NG

  查看最佳答案

• Nora is a site administrator for a large e-commerce site.She notices that the site is running slower and taking longer to process transactions.What should Nora first do to trouble shoot the problem？()

  A.Identify any bottlenecks in the current system by using the site diagnostic tools such as web trends. B.Apply any necessary patches to the software running the site. C.Monitor the CPU usage of the server running the site by using Windows NT performance monitor. D.Test the site using different connection speeds to verify whether the connection is running more slowly.

  查看最佳答案