网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
The upper section of a piston is called the （）
A
land
B
skirt
C
crown
D
plate
参考答案
参考解析
解析：
暂无解析
更多 “单选题The upper section of a piston is called the （）A landB skirtC crownD plate” 相关考题
考题
The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the( ).
A.flash pointB.fire pointC.upper explosive limitD.lower explosive hmlt
考题
The statement of cash flows consists of an operating section, an income section, and an equity section.()
考题
Piston cooling fins are locatedA.atop the piston crownB.beneath the piston crownC.at the base of the piston skirtD.inside the cylinder liner cooling water jacket
考题
The upper piston rings m large, slow-speed, two-stroke/cycle diesel engines are most effectively lubricated by oil ____.A.fed from mechanical lubricatorsB.thrown off from the main bearingsC.supplied from wick fed drip lubricatorsD.flow from a centrifugal or banjo oiler
考题
On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the ______．A.minimum oxygen content lineB.critical displacement lineC.critical dilution lineD.upper threshold limit
考题
The system of valves and cargo lines in the bottom piping network of a tanker that connects one section of cargo tanks to another section is called a ______．A.come-alongB.crossoverC.manifoldD.runaround
考题
The section of each end of a barge which is heavily reinforced to take the pressure of pushing is called the ______．A.HeadlogB.TowheadC.Collision bulkheadD.Bullnose
考题
The deck from bow to stern is called the （）(主甲板).A、main deckB、tweendeckC、upper deckD、lower deck
考题
从船艏贯穿至船艉的甲板叫主甲板。（）A、The deck from bow to stern is called the main deck.B、The deck from stern to bow is called the tweendeck.C、The deck from bow to stern is called the upper deck.D、The deck from stern to bow is called the lower deck.
考题
单选题Securing cargo by running timbers from an upper support down to the cargo，either vertically or at an angle，is called（）.A
bracesB
dunnageC
shoresD
toms
考题
单选题The diameter of a piston is usually less at the crown than at the skirt, in order to （）.A
facilitate the installation of piston ringsB
allow for the expansion of the piston during operationC
prevent crankcase vapors from entering the combustion chamberD
reduce wearing of the upper cylinder liner
考题
单选题The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a（）.A
crossoverB
runaroundC
come-alongD
manifold
考题
单选题The foremost part of the upper deck is called the（）.A
forecastleB
tweendeckC
hatchesD
peak tanks
考题
单选题The clearance volume for a single stage compressor is defined as the space created between the （）.A
top of the piston and bottom side of head, with the piston at BDCB
piston and head, including the space around the piston to the top of the upper ring and under the valves, with the piston at TDCC
bottom of the piston and bottom side of the head at TDC, regardless of upper ring location and valve placementD
top of the piston and bottom side of the head at TDC as compared to that which exists between the top of the piston and bottom side of head at BDC
考题
单选题The main purpose of the piston oil scraper rings is to （）.A
seal the space between the piston and the linerB
reduce the amount of lube oil burned in the combustion chamberC
transmit heat from the piston to the cylinder linerD
damp out fluctuations of the piston side thrust
考题
单选题The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.A
so a heightB
such a heightC
so highD
such high
考题
单选题The cast iron guide-ways for （） are attached to the top section and seal off the crankcase.A
the connecting rodB
the cross-headC
the piston rodD
the air box
考题
单选题Which of the following statements concerning cylinder liner wear is true?（）A
Liner wear is distributed equally between the upper and lower portions of the cylinderB
Excessive liner wear causes wear between piston ring and grooveC
Excessive, but uniform liner wear will not cause wear between piston ring and grooveD
Liner wear is normally greatest in the middle of the cylinder
考题
单选题If due to thick and hard deposits of carbon, the piston rings cannot move freely in their grooves, dark areas will often appear on the upper part of the cylinder wall (may not be the risible at port inspection)What condition of the piston rings can result in this phenomenon?（）A
micro-seizureB
stickingC
scratchedD
breakage/ollapse
考题
单选题The section of each end of a barge which is heavily reinforced to take the pressure of pushing is called the（）.A
HeadlogB
TowheadC
Collision bulkheadD
Bullnose
考题
单选题Piston cooling fins are located（）A
atop the piston crownB
beneath the piston crownC
at the base of the piston skirtD
inside the cylinder liner cooling water jacket
考题
单选题从船艏贯穿至船艉的甲板叫主甲板。（）A
The deck from bow to stern is called the main deck.B
The deck from stern to bow is called the tweendeck.C
The deck from bow to stern is called the upper deck.D
The deck from stern to bow is called the lower deck.
热门标签
最新试卷