更多"The direct acting mechanical govern"的相关试题:
[单项选择]In a simple mechanical governor, the （）
A. centrifugal force rotates the ball-head
B. flyweight centrifugal force is balanced by spring force
C. flyweight centrifugal force is balanced by hydraulic pressure
D. speeder spring alone actuates the fuel control rod
[单项选择]Which of the items listed causes a direct acting mechanical governor to operate the engine fuel control linkage?（）
A. Hydraulic oil pressure
B. Servomotor action
C. Flyweight centrifugal force
D. Relay motion
[单项选择]The usual number of single-acting pistons used in a variable stroke axial-piston pump is （）.
A. 3 or 5
B. 5 or 7
C. 7 or 9
D. 9 or 11
[单项选择]The result of two forces acting in opposite directions and along parallel lines，is an example of what type of stress?（）
A. Tensile
B. Compression
C. Shear
D. Strain
[单项选择]A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an （）
A. rotor
B. stator
C. exciter
D. armature
[单项选择]What type of valve is used to direct the flow of hydraulic fluid?（）
A. Relief valve
B. Direction control valve
C. Stop valve
D. Pressure control valve
[单项选择]Soot blowers should be used in proper sequence so that（）
A. excess stresses will not be set up in the boiler
B. the decks will not be covered with soot
C. the soot will be swept toward the uptakes
D. there will not be a loss of steam pressure
[单项选择]（）, so they are widely used on board ship nowadays.
A. Diesel engines have more advantages in comparison with gasoline engines
B. Diesel engines have more advantages in comparison to gasoline engines
C. Gasoline engines have more advantages in comparison with diesel engines
D. Gasoline engines have more advantages in comparison to diesel engines
[单项选择]Rotating flyweights acting against spring pressure make a simple type of （）.
A. governor
B. safety valve
C. reducing valve
D. feed water regulator
[单项选择]direct表示（）
A. 8位立即数
B. 16位立即数
C. 8位直接地址
D. 16位地址
[单项选择]The single acting cylinder is the simplest form where pressure is applied to the full area of the piston head to move the load through piston rod extensionThe load causes rod （） when the drive pressure is released.
A. contraction
B. retraction
C. expansion
D. shrinkage
[单项选择]The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when（）.
A. decelerating when lowering the load
B. decelerating when raising the load
C. lowering the load at constant speed
D. raising the load at constant speed
[单项选择]Tensile stress is a result of two forces acting in（）.
A. opposite directions on the same line，tending to pull the material apart
B. opposite directions on the same line，tending to compress the object
C. opposite directions along parallel lines
D. the same direction along parallel lines
[单项选择]A vessel behaves as if all of its weight is acting downward through the center of gravity，and all its support is acting upward through the（）.
A. keel
B. center of buoyancy
C. tipping center
D. amidships section
[单项选择]In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs （）
A. once every crankshaft revolution
B. once every two crankshaft revolutions
C. once every piston stroke
D. twice every piston stroke
[单项选择]In a single acting, two-stroke/cycle, diesel generator engine, the power impulse in an individual cylinder occurs （）
A. once every crankshaft revolution
B. once every two crankshaft revolutions
C. once every piston stroke
D. twice every piston stoke
[单项选择]Free communication effect is in direct proportion to（）.
A. length and width of space
B. length of space only
C. width of space only
D. neither length nor width
[单项选择]During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）
A. Flywheel inertia
B. Admission of starting air
C. The way of the vessel
D. securing of fuel to the cylinders
