海船船员考试
单选题Overload protection on hydraulic system is provided by the use of （）.A stop valvesB pressure relief valvesC balance valvesD regulating speed valves
题目
stop valves
pressure relief valves
balance valves
regulating speed valves
相似问题和答案
第1题：
If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to prevent
A.failure of the hydraulic hose
B.excessive flow through the line
C.friction in other areas of the hydraulic system
D.overheating of the hydraulic fluid
第2题：
After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?
A.The relief valves in the system should be readjusted
B.The filters and strainers should be checked frequently
C.All system pressure should be readjusted
D.The system should be drained and renewed with a fluid of different operating characteristics
第3题：
(c) (i) Provide three examples of personal financial planning protection products that would be of use in
Henry’s situation. Justify your selections by reference to the type of protection provided. (6 marks)
(c) (i) Protection products
Henry is still working and has a mortgage to support. He therefore needs to protect not only his assets but also cover
any debt, or the ability to repay. The following protection policies are relevant to Henry’s situation.
Life assurance
This is a form. of insurance that pays out on a chargeable event, usually death. The main types are:
– Term Assurance which provides cover for a fixed term with the sum assured payable only on death. No investment
benefits or payments arise on survival.
– Whole of Life Assurance where the policy provides life protection. The sum assured is payable on death at any time
and usually some form. of investment benefit will accrue in the form. of a surrender value.
A qualifying policy will give a tax-free lump sum that could, for example, be used to repay the mortgage.
Permanent health insurance
Permanent health insurance policies are designed to provide the policyholder with a benefit if s/he is unable to work
through sickness or if s/he needs medical expenses or long-term care.
This would provide Henry with an income in the event of illness – again useful given his mortgage, and would avoid
the need to liquidate other assets to pay the mortgage or ongoing costs.
Critical illness insurance
These policies provide a capital sum where a critical illness (from a large range listed in the policy) is diagnosed.
For the same reasons above, Henry should consider this in conjunction with permanent health insurance.
Note: Marks will also be given for other relevant protection products, e.g. specific mortgage protection insurance linked
to an event other than death.
第4题：
Most pedestal crane power is provided by ______．
A.Electro-hydraulic units
B.Steam units
C.Independent internal combustion power units
D.All of the above
第5题：
Which of the following can be used in hydraulic transmission system?
A.Hydraulic oil
B.Animal oil
C.Light oil
D.Fuel oil
第6题：
Before doing any work on a hydraulic system equipped with accumulators, you should
A.drain the accumulators and purge with oxygen
B.bleed off all stored energy from the accumulators completely
C.charge the accumulators to prevent system energy loss
D.pump the hydraulic fluid into the accumulators to prevent fluid loss
第7题：
One function provided by a hydraulic accumulator is to ___.
A.provide an area where air can separate from the oil
B.provide an area to separate solid contaminants from the oil
C.act as an oil and water separator
D.absorb shocks occurring in the system
第8题：
Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an( ).
A.overload on the pump motor
B.low fluid level in the reservoir
C.low fluid viscosity around the shaft seal
D.high oil level in the sump
解析：reservoir：储液器，油箱
译文：电液锚机液压流体过热有可能是油箱中液位低引起的。
第9题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第10题：
保护系统 protection system
正确答案:产生与保护任务有关的信号以防止反应堆状态超过规定的安全限值，或缓解超过安全限值后果的系统，它包括从敏感元件到安全驱动器输入端（还可到安全系统支持设施输入端）的所有设备和线路。