更多"The （） returns the pump operating r"的相关试题:
[单项选择]The control rod of a steering gear pump is attached at its outer end to （）.
A. the hunting gear
B. the rudder stock
C. the rudder controller
D. the feedback unit
[单项选择]While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.
A. A decreasing reading on loran pair 9960-X
B. The bearing of Wolf Trap Light changing to the right
C. Increasing soundings
D. The bearing of Wolf Trap Light changing to the left
[单项选择]Which pump is the self-priming pump?（）
A. turbine
B. centrifugal
C. ejector
D. mixed flow
[单项选择]The （）pump is usually used as the bilge feed pump to an oily water separator.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]A （） pump is that where the volume of the pump chamber is alternately increased to draw the liquid in and then decreased to force the liquid out.
A. injector
B. positive displacement
C. centrifugal
D. centripetal
[单项选择]A mixed-flow pump is a （） pump classified by the working principle.
A. self priming
B. positive displacement
C. reciprocating
D. impeller
[单项选择]
An acceptable means of tightening connecting rod and main bearing cap bolts is to measure the （）
Ⅰ.torque applied to each nut and bolt assembly
Ⅱstretch of each nut before and after tightening
A. Ⅰonly
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]The connecting rod large end bearing shell generally has tags for location and oil grooves round the center of its axial length which correspond with grooves in the （） through which oil is transmitted up the rod to lubricate the small end.
A. connecting rod
B. piston rod
C. bearing housing
D. none of the above
[单项选择]The connecting rod is fitted between the crosshead and the crankshaftI t transmits the firing force, and together with the crankshaft converts the （）motion to a （）motion.
A. rotary；reciprocating
B. up and down；fore and aft
C. fore and aft；up and down
D. up and down；rotary
[单项选择]Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.
A. clearance
B. crush
C. pitch
D. thrust
[单项选择]Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）
A. Impeller
B. Electric motor
C. Volute
D. Eye
[单项选择]Which pump installation would require an external source of sealing water?（）
A. Main circulator pump jacket water cooling
B. Salt water service pump
C. Auxiliary condensate pump
D. Bilge pump
[单项选择]Fuel pump index is （）.
A. the viscosity index
B. the fuel oil contents
C. the starting speed
D. the reading at the rack
[单项选择]Most pump manufacturers recommend that the suction piping dimension for centrifugal pumps be （）.
A. one size smaller than the pump suction nozzle
B. the same size as the pump suction nozzle
C. one size larger than the pump suction nozzle
D. installed with a short radius elbow at the pump
[单项选择]Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.
A. one size larger than the pump discharge nozzle
B. the same size as the pump discharge nozzle
C. one size smaller than the pump discharge nozzle
D. installed with a short radius elbow at the pump
[单项选择]A centrifugal pump vibrates excessively during operationUpon disassembling the pump it is found that the impeller is out of balanceWithout an available spare, you should （）.
A. drill holes through the heavy side of the impeller until it balances
B. weld counterweights to the light side of the impeller
C. remove metal from the heavy side by machining in a lathe
D. acid wash and serape the heavy side until it balances
[单项选择]When disassembling or assembling an injection pump plunger and barrel you should （）
A. keep the parts immersed in diesel fuel
B. always keep the plunger and barrel together
C. work over a linoleum-type surface
D. all of the above
[单项选择]The centrifugal pump component responsible for converting the mechanical energy of the liquid being pumped, to that of kinetic energy is the （）.
A. electric motor
B. volute
C. impeller
D. diffusion nozzle
[单项选择]A centrifugal pump produces the required pressure energy by means of a rotating （） provided with vanes.
A. propeller
B. impeller
C. circumference
D. screw
