更多"Which of the following statements i"的相关试题:
[单项选择]Which of the following statements is correct concerning diesel engine cooling water systems?（）
A. Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation
B. propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder
C. At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangers
D. Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling
[单项选择]Which of the following statements is correct relative to distillation plant operation?（）
A. Distillation is the process of boiling seawater to produce vapor which is condensed into fresh water
B. Evaporation is the second part of the distillation process where brine is removed
C. Brine is the result of condensed sea water vapor
D. Distillate is the product resulting from the evaporation of fresh water vapor
[单项选择]Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）
A. Oil is discharged from the impeller through the outlet
B. Gravity causes the oil to flow toward the discharge
C. The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts
D. The discharge capacity varies directly with the speed of the impeller
[单项选择]Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）
A. At zero load the intake manifold pressure is greater than the exhaust manifold pressure
B. At full load the intake manifold pressure and exhaust manifold pressure are equal
C. At full load the intake manifold pressure is less than the exhaust manifold pressure
D. At full load the intake manifold pressure is greater than the exhaust manifold pressure
[单项选择]Which of the following statements is correct for the design and installation of diesel engine cooling water systems?（）
A. An alarm device with audible and visible signals is required for all cooling water systems
B. Propulsion engines with bores over 200 mm are to be fitted with cooling water jackets
C. Each totally enclosed cooling system shall be provided with a suitable head tank
D. Drain cocks are to be provided at the lowest points of all cylinder water jackets
[多项选择]Which three statements are correct about RIP version 2 (Choose three.)（）。
A. It has the same maximum hop count as version 1
B. It uses broadcasts for its routing updates
C. It is a classless routing protocol
D. It has a lower default administrative distance than RIP version 1
E. It supports authentication
F. It does not send the subnet mask in updates
[单项选择]Which of these statements is correct regarding SSO and Cisco NSF?（）
A. Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds.
B. Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds.
C. Distribution switches are single points of failure causing outages for the end devices.
D. Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than one second.
E. NSF and SSO with redundant supervisors have the most impact on outages at the access layer.
[单项选择]Which of the listed statements is correct concerning refrigeration systems?（）
A. Dehydrators must be used continuously in a refrigeration system
B. A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours
C. A thermostatic expansion valve is used to control refrigerated space temperature
D. The liquid receiver functions to collect and remove non- condensable gases
[单项选择]Which of the following would be of immediate concern after discovering a large fire in the ship’s galley?（）
A. An adjacent storeroom，containing spare parts
B. A storeroom directly above，containing combustible fluids
C. An adjacent storeroom，containing mattresses and linen
D. An adjacent storeroom，marked "Stewards Stores"
[单项选择]Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?（）
A. the direct acting relief valve is used for controlling lower flows and pressure
B. the pilot operated relief valve is used for controlling higher flows and pressure
C. the pilot operated relief valve is used for controlling lower flows and pressure
D. the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
[多项选择]Which two statements about zoning are correct? （）
A. Zoning increases security.
B. DNS queries are used for software zoning.
C. Software zoning is more secure than hardware zoning.
D. When using zones and VSANs together, the zone is created first.
E. Zoning requires that VSANs be established before it becomes operational.
[单项选择]Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
A. If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
B. Channel 16 (156.8) may be used for distress messages
C. It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
D. Distress messages should first be transmitted on 2182 kHz
[单项选择]Which of the following statements concerning cargo is correct?（）
A. Cargoes are any type of goods transported by any type of ships
B. Cargoes are goods transported in bulk
C. Cargoes usually include goods transported in bulk and in containers
D. Cargoes are usually packaged in containers
