考试系统

Mechanical construction safety Back

Single-choice question

Question 1

During the operation of the equipment, it is found that the specimen is tilted. Which of the following statements is correct?

A:Use your hands to adjust directly

B:No downtime, adjust with tools

C:Stop the machine and run after reinstallation

D:Do not stop until the processing is finished

Correct answer： C

Question 2

Large instruments are generally controlled by computers. Under what conditions are data transmission lines between computers and instruments loaded and unloaded?

A:At any time

B:Instrument and computer power off

C:When the instrument is in working condition

D:When the computer is working

Correct answer： B

Question 3

When measuring the total heat transfer coefficient of the components with the hot box method, the temperature of the cold and hot box should be consistent with the service temperature of the components as far as possible, and the temperature difference should be higher than

A:5℃

B:10℃

C:15℃

D:20℃

Correct answer： C

Question 4

When measuring the conversation noise, if the wind speed is large, the microphone:

A:Fan cover is required

B:Height should be lowered

C:Proper change of direction is required

D:Height should be increased

Correct answer： A

Question 5

How does the pressure increase or decrease during the operation of the grinder?

A:Fast

B:Casual

C:Gradually

D:Stably

Correct answer： C

Question 6

How should the model tool be placed after use?

A:Place on the workbench

B:Put it in the toolbox in a timely manner

C:Place at will

D:Keep it handy

Correct answer： B

Question 7

After the lathe is started:

A:You cannot use both vertical and horizontal automatic handles at the same time

B:Can not change the feed

C:You can use both vertical and horizontal automatic handles at the same time

Correct answer： A

Question 8

The reasons for the limit position check before turning begins are:

A:To prevent the chuck from colliding with the tool holder or the turning tool

B:In case that work-piece is not sticking out long enough

C:Prevent work-piece from jittering due to improper loading

D:None of the above

Correct answer： A

Question 9

The method of checking the limit position of lathe is as follows:

A:The spindle is at low speed and automatically cut to the limit position of the machined surface

B:The spindle is at low speed and manually cut to the limit position of the machined surface

C:The turning tool is aligned to the limit position of the machining surface, the variable speed handle is placed in the empty position, and the handle is hovered around with the chuck

D:None of the above

Correct answer： C

Question 10

When using a lathe to cut a work-piece, what should be locked up first?

A:Tailstock

B:Tailstock sleeve

C:Blade carrier

D:Nut

Correct answer： C

Question 11

When loading and unloading a work piece on a milling machine, the position of the worktable should ensure that:

A:The tool is on the left side of the work-piece

B:The tool is on the right side of the work-piece

C:The tool is as far away from the work-piece as possible

D:In the opposite position of the knife

Correct answer： C

Question 12

When the milling machine is fed quickly, attention should be paid to:

A:dial scale

B:main shaft speed

C:Position of tool and work-piece

D:Tool rotation direction

Correct answer： C

Question 13

When the milling machine sets the cutter, it shall be guaranteed that:

A:The tool is still and the work-piece is fed quickly

B:Tool rotates, and the work-piece is fed slowly manually

C:The tool is still and the work-piece is fed at a slow speed

D:The tool rotates and the work-piece is quickly and manually fed

Correct answer： B

Question 14

Which is the right thing to do when a hand saw is about to break?

A:Slow down sawing

B:Increase the pressure at the time of sawing

C:The speed of the saw can be increased

D:Break the work-piece with a hammer

Correct answer： A

Question 15

Can one wear gloves when using a drilling machine?

A:No

B:Yes

C:At will

D:As required

Correct answer： A

Question 16

Regarding the drilling machine, how should you increase or reduce the pressure when using manual feed?

A:Carefully

B:Fast

C:At will

D:Gradually

Correct answer： D

Question 17

When the file is not in use for the time being, what position should it be placed on the worktable?

A:The file can be put anywhere

B:Put the file on top of the vice

C:It shall be placed on the right of the bench vice

Correct answer： C

Question 18

When the drilling machine is operated, if manual feed is used, what should you do?

A:Select a file

B:Adjust the travel limit block

C:Select the feed speed

D:Select the saw blade

Correct answer： B

Question 19

Does the work-piece need to be clamped firmly and reliably when drilling with a drilling machine?

A:Not necessary

B:Necessary

C:Necessary for large work-piece

D:Not necessary for small work-piece

Correct answer： B

Question 20

When drilling a small piece of work in a drill, can you take it directly by hand?

A:Yes

B:No

C:When convenient

D:No when inconvenient

Correct answer： B

Question 21

After using the mould needle and the stomatal needle, what should you do?

A:The tip of the needle is lowered down into the toolbox

B:The needle tip is put in the tool box upwards

C:Insert into mold sand pile

D:It do not matter

Correct answer： A

Question 22

Which of the following methods can be used to blow the sub-molding sand in the shape of the molding?

A:Air blower

B:Mouth blowing

C:Fan by hand

D:All of the above

Correct answer： A

Question 23

How should the cast-out cast be treated?

A:Water to accelerate its cooling

B:Touch the casting by hand

C:Remove the casting immediately after falling sand

D:Sand cleaning will be carried out after cooling for a certain period of time

Correct answer： D

Question 24

What should be noted when the casting is to be sand-removed?

A:Reach out to test the casting temperature

B:Reach out to test the temperature of the molding sand

C:Wear protective gloves and clean up the sand

Correct answer： C

Question 25

During the forging process, what are the requirements for standing position:

A:Do not stand in a place where it is easy to be hit by the hairy edges of forgings

B:Do not stand near the forging equipment

C:No restriction on standing position

Correct answer： A

Question 26

During forging, what matters should be paid attention to when the foot steps on the pedal?

A:The heel is not allowed to be suspended

B:The heel is allowed to be suspended

C:The heel is suspended or not from time to time

Correct answer： A

Question 27

In the forging process, what should be paid attention to when not hammering?

A:Feet can be on the pedal all the time, as long as you do not force

B:The foot should leave the pedal

C:The foot can be stepped on the pedal or not from time to time

D:It do not matter

Correct answer： A

Question 28

In the forging process, for forgings that have not yet been cooled thoroughly, which of the following statements is most appropriate?

A:Touch it.

B:Not touch it

C:Blow on it with your mouth and cause it to cool down

D:Just reach for it

Correct answer： B

Question 29

In the stamping process, if the work-piece is stuck in the die, what should be done?

A:Take with hand

B:Take with special toosl

C:Take with hand or special tools

D:Take with a crowbar

Correct answer： B

Question 30

What matters should be paid attention to when loading and unloading parts in the stamping process?

A:The foot should leave the pedal

B:The foot can rest on the pedal all the time, as long as it is not forced

C:The foot may step on and off the pedal

D:No need to pay any special attention

Correct answer： A

Question 31

When using CNC machine tools to process parts, which of the following statements is most appropriate?

A:The program can be input into the numerical control device for part processing, and the program can be changed at any time when a problem arises

B:The program can be input into the numerical control device at any time to carry out the part processing,

C:It is strictly forbidden to input unverified programs into CNC devices for machining parts

D:None of the above

Correct answer： A

Question 32

When manually operating a CNC milling machine, what should be checked in order to ensure that it will not overshoot or hit other facilities of the machine?

A:Tool position

B:Spindle speed

C:Fixture position

D:Parameter settings

Correct answer： A

Question 33

When the nc edm wire-cutting machine is working normally, but a sudden smell of burning comes from the electrical cabinet of the machine, what treatment measures should be taken?

A:Follow the charred smell

B:Spray the electrical cabinet with a special fire extinguisher

C:Ignore and continue processing

D:Turn off the total power of the machine to find the reason

Correct answer： D

Question 34

When CNC lathe is in turning processing:

A:Close protective door

B:You do not have to close the protective door

C:It can be closed or opened as needed

D:Shut off the power

Correct answer： A

Question 35

Before the laboratory pump is closed, the valve should be:

A:Fully open

B:Fully closed

C:Half open

D:It do not matter

Correct answer： B

Question 36

How should the propeller current meter be placed after the experiment?

A:Keep level

B:Keep upright

C:Head suspension

D:Tail suspension

Correct answer： C

Question 37

How should the hydraulic model be placed after use?

A:Put it on the instrument platform

B:Put in the model box in a timely manner

C:Place it at random

D:Keep it handy

Correct answer： B

Question 38

To protect the hearing, in no case shall the noise of the working environment of the building physics laboratory exceed ( )
Correct answer： A

Question 39

For all parameters stored in the CNC system of the CNC machine tool, please note:

A:It is strictly forbidden to open, change and delete without permission

B:One can open it, change it, and delete it randomly

C:One can open arbitrarily, but cannot change and delete

D:None of the above

Correct answer： A

Question 40

When operating, which of the following statements is most appropriate?

A:Students can operate by themselves

B:Students can operate under the guidance of the teacher

C:Operate with a professional license

D:Operate with a motor vehicle driver license

Correct answer： C

Question 41

When it is found that there may be dust in the eyes, which measures should be taken?

A:Adhere to the practice and go to the hospital after work

B:Tell instructor first, go to a hospital to check as soon as possible

C:Adhere to the practice and do not go to the hospital if not really sick

D:Go to the hospital immediately for an examination

Correct answer： B

Question 42

What if you smell something burning during the test?

A:Power off and leave

B:Turn on the ventilator for ventilation

C:Shut down immediately and report to the responsible person

D:Ask someone from the lab to check

Correct answer： C

Question 43

In case of any safety accident during pouring,

A:Flee the scene quickly

B:Remain calm, report and follow instructions

C:Deal with it at your own discretion

Correct answer： B

Question 44

For chloromethane (chloroform) used for bonding plexiglass, which of the following statements is most appropriate?

A:Do not touch human body

B:Access to the human body

C:It do not matter

D:For special cases

Correct answer： A

Question 45

The part of the propeller tachometer sensor that you should be most careful with is:

A:Head propeller

B:Stem

C:Aft connection

D:Stern socket

Correct answer： A
True or False question

Question 1

Before turning on the lathe, check whether the lubricating oil meets the operation requirements.

A:TRUE

B:FALSE

Correct answer： A

Question 2

Before turning on the lathe, it is not necessary to check whether each handle of the lathe is in the normal position.

A:TRUE

B:FALSE

Correct answer： B

Question 3

When installing the tool, use the wrench correctly and prevent the wrench from slipping and hurting people.

A:TRUE

B:FALSE

Correct answer： A

Question 4

When the machine is in operation, the spindle speed can be changed.

A:TRUE

B:FALSE

Correct answer： B

Question 5

After the milling machine processing, the bench should stop in the central position, lifting platform should fall to the lowest position.

A:TRUE

B:FALSE

Correct answer： A

Question 6

When the machine tool is fast feeding, the clutch of the handwheel should be turned on to prevent the handwheel from rotating quickly and hurting people.

A:TRUE

B:FALSE

Correct answer： A

Question 7

Before starting up the grinder, check whether the operating handles have been returned to the neutral position. Then run idle, and pay attention to whether there is lubricating oil in the lubrication parts. Let it idle for several minutes, confirm the normal condition of the machine before working.

A:TRUE

B:FALSE

Correct answer： A

Question 8

The work-piece can be ground by hand.

A:TRUE

B:FALSE

Correct answer： B

Question 9

When using a hand saw, the blade should be properly tightened. The speed of the saw should not be too fast, and the pressure should not be too large, so as not to cause injuries when the saw blade suddenly breaks off and pops out.

A:TRUE

B:FALSE

Correct answer： A

Question 10

When the work-piece is about to be sawed off with a hand saw, you should hold the part that was sawed off in place with your hand to prevent the work-piece from falling down and breaking your foot or damaging the work-piece.

A:TRUE

B:FALSE

Correct answer： A

Question 11

When filing, if the file is not used for the time being, place the file on the right side of the vise table and the handle should not be exposed.

A:TRUE

B:FALSE

Correct answer： A

Question 12

When drilling with a drilling machine, the body can be closer to the main axis as it is easier to work this way.

A:TRUE

B:FALSE

Correct answer： B

Question 13

When working on the drilling machine, if the drill bit is wrapped with long iron scrap, it can be broken by hand.

A:TRUE

B:FALSE

Correct answer： B

Question 14

When working on the drilling machine, if the bit is wrapped with iron filings, it should be stopped to clean up.

A:TRUE

B:FALSE

Correct answer： A

Question 15

When using the manual feed on the drilling machine, the pressure should be gradually increased or decreased to avoid the accident caused by improper force.

A:TRUE

B:FALSE

Correct answer： A

Question 16

When drilling small parts in a drilling machine, hold directly with the hand. You do not have to use tools for clamping.

A:TRUE

B:FALSE

Correct answer： B

Question 17

When using the drilling machine for work, the drilling machine, tools, fixtures and so on should be checked comprehensively. Proceed after confirmation.

A:TRUE

B:FALSE

Correct answer： A

Question 18

When using a grinder to grind a surface, the disk suction should be checked to see if it is normal and the work-piece should be fastened. For the work-piece with smaller contact surface, the front and back should be added with block and baffle. Adjust the limit bar according to the grinding length of the work-piece.

A:TRUE

B:FALSE

Correct answer： A

Question 19

After starting up the EDM machine tool, you can touch both electrodes.

A:TRUE

B:FALSE

Correct answer： B

Question 20

In case of abnormal equipment, the machine should be shut down immediately and professional personnel should be consulted for maintenance.

A:TRUE

B:FALSE

Correct answer： A

Question 21

To concentrate on hand forging, the pliers must clamp and position the work-piece firmly and control the direction of the hammer.

A:TRUE

B:FALSE

Correct answer： A

Question 22

When forging by hand, the holder of the forceps should place the forceps on the side of the body, not directly to the abdomen, or put the hand between the forceps.

A:TRUE

B:FALSE

Correct answer： A

Question 23

During manual forging, the forging should be placed in the middle of the lower iron, and the forging, iron pad and other tools must be put in the right and flat position.

A:TRUE

B:FALSE

Correct answer： A

Question 24

During the forging process, the heel can be suspended when stepping on the pedal.

A:TRUE

B:FALSE

Correct answer： B

Question 25

During the forging process, the foot can always step on the step bar without hammering.

A:TRUE

B:FALSE

Correct answer： B

Question 26

During the forging process, the body should not touch the forging which has not been cooled thoroughly.

A:TRUE

B:FALSE

Correct answer： A

Question 27

In forging practice, hammer head can be used to hit the iron, or direct forging hot or cold forging.

A:TRUE

B:FALSE

Correct answer： B

Question 28

During forging, do not stand where sparks are likely to fly and where the edges of forgings are rough.

A:TRUE

B:FALSE

Correct answer： A

Question 29

The exposed sliding surface of the four-column hydraulic press should be kept clean. Check whether the oil meets the requirements before working.

A:TRUE

B:FALSE

Correct answer： A

Question 30

In the process of stamping, no matter the cutting plate, blanking or forming, the hand must not be placed under the knife edge or the mold.

A:TRUE

B:FALSE

Correct answer： A

Question 31

Before using oxy-acetylene flame welding and cutting, check whether there is a tempering safety device.

A:TRUE

B:FALSE

Correct answer： A

Question 32

During gas welding and cutting operation, the working pressure of gas decompression should be correctly selected and adjusted.

A:TRUE

B:FALSE

Correct answer： A

Question 33

When using the CNC milling machine tool, fast feed.

A:TRUE

B:FALSE

Correct answer： B

Question 34

When using CNC milling machines, when one person clamps the work-piece, another person transfers the program.

A:TRUE

B:FALSE

Correct answer： B

Question 35

When using nc edm wire to cut machine, the molybdenum wire can be touched by hand.

A:TRUE

B:FALSE

Correct answer： B

Question 36

During the stamping process, the foot switch must be carefully controlled. Outsiders are not allowed to stay around the foot switch.

A:TRUE

B:FALSE

Correct answer： A

Question 37

In the stamping process, the foot can always be on the foot switch when loading and unloading the work piece.

A:TRUE

B:FALSE

Correct answer： B

Question 38

During the stamping process, if the work-piece is stuck in the mold, the power should be turned off and removed with a professional tool.

A:TRUE

B:FALSE

Correct answer： A

Question 39

When operating the punch press for stamping operation, you can reach for the work parts in the process of punching die.

A:TRUE

B:FALSE

Correct answer： B

Question 40

During the working process of the punch press, it is strictly forbidden to overhaul and adjust the die.

A:TRUE

B:FALSE

Correct answer： A

Question 41

When installing the work-piece, the work-piece should be installed and clamped. After loading and unloading the work-piece, the wrench of chuck must be removed in time.

A:TRUE

B:FALSE

Correct answer： A

Question 42

When the work-piece is processed, the size of the work-piece can be measured at any time during the processing.

A:TRUE

B:FALSE

Correct answer： B

Question 43

Test data of testing machine should be stored in different categories, and frequently backed up.

A:TRUE

B:FALSE

Correct answer： A

Question 44

Before using high-power experimental equipment, check whether the circuit is grounded.

A:TRUE

B:FALSE

Correct answer： A

Question 45

The illuminometer should avoid violent vibration.

A:TRUE

B:FALSE

Correct answer： A

Question 46

During pouring, other students do not have to move out of the way. They can stand nearby to watch.

A:TRUE

B:FALSE

Correct answer： B

Question 47

During the forging practice,wear good work clothes and work shoes.

A:TRUE

B:FALSE

Correct answer： A

Question 48

It is forbidden to pile up inflammable and explosive materials within 10 meters of the welding site.

A:TRUE

B:FALSE

Correct answer： A

Question 49

The welding site should plan and maintain a clear and unobstructed emergency exit route.

A:TRUE

B:FALSE

Correct answer： A

Question 50

While the machine is in operation, remain focused and do not leave the machine unattended.

A:TRUE

B:FALSE

Correct answer： A

Question 51

When operating a machine tool, work clothes should be worn.

A:TRUE

B:FALSE

Correct answer： A

Question 52

Gloves can be worn when operating machine tools to prevent cutting.

A:TRUE

B:FALSE

Correct answer： B

Question 53

When operating machine tools, those with long hair should wear safety caps.

A:TRUE

B:FALSE

Correct answer： A

Question 54

When the machine is running, do not touch the rotating work-piece by hand.

A:TRUE

B:FALSE

Correct answer： A

Question 55

Wear gloves to protect your hands while working on the drill.

A:TRUE

B:FALSE

Correct answer： B

Question 56

During the internship, please do not move the equipment in the casting workshop. It must be approved by the master before starting under the guidance of the master.

A:TRUE

B:FALSE

Correct answer： A

Question 57

The working clothes shall be worn before the machine tool is operated. Cuffs should be fastened, the lower hem of the top of the coat can not be released, and the gloves are not allowed to be worn on the machine tool which is started. You are not allowed to wear and change clothes besides the machine tool to prevent the machine from being twisted.

A:TRUE

B:FALSE

Correct answer： A

Question 58

In the work of the nipper, working clothes should be put on, the cuffs should be tightened, and long-haired people should wear protective caps.

A:TRUE

B:FALSE

Correct answer： A

Question 59

When using precision instruments, it is necessary to operate strictly in accordance with the operating procedures. Be careful not to damage the instrument due to carelessness. If the instrument is found to be faulty, stop using it immediately, report to the teacher, and remove the fault in time. The registration book must be filled out consciously after use.

A:TRUE

B:FALSE

Correct answer： A

Question 60

Under any circumstances, it is strictly forbidden to stand under the heavy objects of the crane.

A:TRUE

B:FALSE

Correct answer： A

Question 61

In forging practice, the switch and control handle of forging equipment shall not be moved at will.

A:TRUE

B:FALSE

Correct answer： A

Question 62

When welding, you must wear the necessary protective equipment, such as work clothes, gloves, protective glasses and so on.

A:TRUE

B:FALSE

Correct answer： A

Question 63

When abnormal or system alarm occurs in the process of machine tool processing, you should stop immediately and report to the instructor. Wait for their approval before you can continue to operate.

A:TRUE

B:FALSE

Correct answer： A

Question 64

It is strictly forbidden to pile up work-pieces, fixtures, cutting tools, measuring tools and other items on CNC machine tools. The work-piece must be carefully checked before machining, and the tool installation is firm and correct.

A:TRUE

B:FALSE

Correct answer： A

Question 65

It is strictly forbidden to input unverified programs into CNC devices for part processing.

A:TRUE

B:FALSE

Correct answer： A

Question 66

The heating element of box type resistance furnace and its power supply connection point need to maintain good insulation performance. The administrator should carry out regular inspection.

A:TRUE

B:FALSE

Correct answer： A

Question 67

When safety problems arise while using the modeling tools, you do not need to alert your instructor. Find a way to resolve them on your own.

A:TRUE

B:FALSE

Correct answer： B

Question 68

The modeling tools shall be put in strict accordance with the requirements, and the finished modeling tools shall be put into the tool box in time.

A:TRUE

B:FALSE

Correct answer： A

Question 69

Before stamping the model, carefully check the integrity of the guard and the safety of the clutch and the brake.

A:TRUE

B:FALSE

Correct answer： A

Question 70

Before stamping the model, the unnecessary objects on the clean bench need not be cleaned.

A:TRUE

B:FALSE

Correct answer： B

Question 71

When stamping small work-pieces, you can send them by hand instead of using special tools.

A:TRUE

B:FALSE

Correct answer： B

Question 72

The work-piece can be removed by hand when the work-piece is stuck in the mold.

A:TRUE

B:FALSE

Correct answer： B

Question 73

When the equipment stops running, the device button can be rotated and adjusted.

A:TRUE

B:FALSE

Correct answer： B

Question 74

High-speed equipment and precision equipment shall be used under the guidance of management personnel.

A:TRUE

B:FALSE

Correct answer： A

Question 75

The voltage and capacity of the power supply must be in accordance with the electrical requirements of the instrument and equipment.

A:TRUE

B:FALSE

Correct answer： A

Question 76

Before starting the instrument and equipment, read and get familiar with the operating procedures.

A:TRUE

B:FALSE

Correct answer： A

Question 77

The operation of large equipment does not require the presence of more than two staff.

A:TRUE

B:FALSE

Correct answer： B

Question 78

Special protective gloves must be worn to operate CNC WEDM machine tools to avoid skin damage caused by hand corrosion by working fluid.

A:TRUE

B:FALSE

Correct answer： B

Question 79

The protective screen at the arc welding working station can prevent the harm of the welding arc radiation to others.

A:TRUE

B:FALSE

Correct answer： A

Question 80

The metal specimen used in the heat treatment experiment has trace metal powder and oxide dust after heat treatment, which can cause pollution.

A:TRUE

B:FALSE

Correct answer： A

Question 81

The user of the box-type resistance furnace must ensure the safety of electricity. Otherwise, it is easy to cause personal safety accidents.

A:TRUE

B:FALSE

Correct answer： A

Question 82

The enclosure of the box resistance furnace need not be grounded.

A:TRUE

B:FALSE

Correct answer： B

Question 83

When the machine instrument fails, or when the machine and the power equipment are in the abnormal state, the machine shall be shut down first, and then the relevant personnel shall be found for maintenance and the warning board shall be set up.

A:TRUE

B:FALSE

Correct answer： A

Question 84

The battery should be removed when the sound level meter is not in use for a long time.

A:TRUE

B:FALSE

Correct answer： A

Question 85

Sound level meter can be placed in a high temperature, humid, polluted place.

A:TRUE

B:FALSE

Correct answer： B

Question 86

The microphone of the sound level meter can be disassembled by itself.

A:TRUE

B:FALSE

Correct answer： B

Question 87

The wind speed meter is a more precise instrument, which strictly prevents collision vibration and should not be used in places with too much dust or corrosion.

A:TRUE

B:FALSE

Correct answer： A

Question 88

When using Illumination timing, strong light exposure should be avoided.

A:TRUE

B:FALSE

Correct answer： A