[单选题]Before performing any maintenance on a hydraulic system storing energy in an accumulator, you should___.
[单选题]While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take?
[单选题]If the bowl of disk type centrifugal purifier when operate as a separator is not primed, the__________.
[单选题]The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when______
[单选题]Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?
[单选题]Reheating hardened component to a temperature lower than the hardening temperature and then cooling it is known as _____
[单选题]switchboards may be of the dead-front type in which all live parts are installed behind后面 ____ and only the operation handles and instruments are on the front.
[单选题]Coalescence is the breakdown of surface tension between oil droplets in an oil/water mixture, which causes them to join and ( )in size.
[单选题]If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to prevent______
[单选题]_____are to be carried out on all ships instead of the second or third annual survey within 3 months, before or after either one of the anniversary date, after completion, commissioning or special survey, as appropriate.
[单选题]When a refrigeration compressor motor fails to start, the FIRST thing that should be checked for is a_______
[单选题]The opening of the humidifier’s valve of air-conditioner should be _______??when the circumstance temperature is lower than 0℃
[单选题]Diesel engine are remarkably simple in principle and require little in way of________, although what little is required is essential to a long life.
[单选题]Which of the following problems may be encountered by using an oil having a viscosity high than that specified for an operating hydraulic system?
[单选题]Which of the equipment listed is most effective in processing bilge slops for overboard discharge?
[单选题]The correct tightening is obtained by the use of ____ to measure the extension given to the bolts
[单选题]A liquid boils and condenses the change between the liquid and gaseous state at a temperature which depend on its _____ within the limits of its freezing point and critical temperature.
[单选题]Because the electronic governor controller is a sensitive piece of electronic equipment and should not be mounted on the engine or in areas where it will be exposed to ___.1 Vibration???2 Humidity???3High temperature???4 Oxygen
[单选题]Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?
[单选题]If the centrifugal pump operating with a positive suction head becomes air bound, your first response should be to_____
[单选题]In a single acting .two--stroke/cycle , diesel engine ,the power impulse in an individual cylinder occurs___.
[单选题]n chemical sewage treatment system , tests must be performed ___to check the chemical dosage rates .
[单选题]During oil transfer operations, who would be responsible to guarantee that the posted procedures are being followed?
[单选题]if the water level cannot be seen in the lower part of the boiler gauge glass, which of the following actions must be carried out immediately?
[单选题]The _____ of a ship is not normally used to indicate the size of a ship, whereas the ______, based on the ship’s loading capacity, including fuel and lube oils etc. for operation of the ship, measured in tons at scantling draught, often is. 重量轻的船通常并不是用来表示大小的船,而无谓,根据船舶的装载能力,包括船舶的燃料和润滑油油等操作,以吨材料尺寸吃水,通常都是如此。
[单选题]When pumping down an air conditioning system to test the low pressure cutout switch, you should _____
[单选题]Particulate matter(PM)is a complex mixture of inorganic无机 and organic 有机compounds resulting from ____, partly unburned lube oil, thermal splitting of HC from the fuel and lube oil,ash in the fuel and lube oil,sulphate and water.
[单选题]In order to reduce the chance of detentions ships should routinely verify the following except for ____.
[单选题]The company should establish in the SMS that ____has the overriding authority and the responsibility to make decision with respect to safety and pollution
[单选题]The lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition, is defined as the _____
[单选题]For the oil purifier, the water content of the oil is continuously____ and when a pre-set maximum level is reached a total discharge function is automatically actuated.