更多"Tools with （）handles should be used"的相关试题:
[单项选择]The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.
A. assist in a quick cutoff of fuel injection
B. allow oil backflow from the injector to the helix
C. reduce fuel oil pressure between injection strokes
D. meter the quantity of fuel delivered
[单项选择]Check value is used to control （）
A. direction of oil flow
B. back pressure of return oil
C. bypass of filter
D. high pressure overflow
[单项选择]Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?（）
A. The follow-up gear
B. The rudder angle indicator
C. The synchronous electric transmitter
D. A rudder angle limit switch
[单项选择]Hydraulic control check value is generally used to （） in the marine hydraulic mechanism.
A. control the back pressure of return oil
B. lock the oil lines under some conditions
C. change the direction of oil flow
D. act as relief valve
[单项选择]A swing check valve is used in a pipeline to （）.
A. maintain a preset pressure on the line
B. closely regulate the amount of flow
C. relieve excessive pressure on the line
D. allow flow in one direction only
[多项选择]Check约束可以实现（）
A. 限制一个表中单个列的取值范围
B. 限制一个表中多个列之间的取值约束
C. 限制不同表之间列的取值约束
D. 为列提供默认值
[单项选择]Tools and instruments belong to（）.
A. raw materials
B. consumable products
C. finished metalic products
D. raw metallic products
[单项选择]CHECK约束的作用是（）
A. 维护数据的实体完整性
B. 提高数据录入效率
C. 限制列的取值范围
D. 提高数据修改效率
[单项选择]A check line is（）.
A. A safety line attached to a man working over the side
B. Used to measure water depth
C. Used to slow the headway of a barge
D. Used to measure the overhead height of a bridge
[单项选择]Navigational marks used for informational or regulatory purposes are（）.
A. solid yellow
B. white with orange geometric shapes
C. red and white vertically-striped
D. green and red horizontally-banded
[单项选择]Overflow valve is used to （）
A. control the fluid flow through it
B. prevent the pressure before it over the specified valve
C. make the pressure after it steady
D. control the direction of oil flow
[单项选择]The only cylindrical chart projection widely used for navigation is the （）.
A. Lambert conformal
B. Mercator
C. azimuthal
D. gnomonic
[单项选择]The material used extensively as electrolytic protection around bronze propellers is（）.
A. Brass
B. Copper
C. Lead
D. Zinc
[单项选择]Differential needle valves used in fuel injectors are directly closed by（）
A. cam action
B. spring force
C. fuel oil pressure
D. firing pressure
[单项选择]Thoroughly conduct a background check on the company, （）as many phone calls and Internet searches as you can.
A. made
B. makes
C. making
D. make
