93, according to the provisions of the Ministry of construction, engineering construction accidents are divided into several levels?

First and second level

B, 3 grades

C, level 4

94. What kind of personal protective equipment should lathe operators not use when driving a bed?

First, anti-collision glasses

B, cotton gloves

C, anti-smashing shoes

95. What kind of shoes should a gas station attendant wear?

A, rubber-soled canvas shoes

B, rubber shoes with iron shoes.

C, conductive shoes

96, metal casting operators should wear what kind of protective clothing?

First, polyester

B, nylon

C, pure cotton

97. What cloth should be used for the work clothes worn by gas station oilers?

I. Blending of Polyester and Cotton

B, pure polyester

C, pure cotton

98, which of the following operators can't wear gloves when operating equipment?

I. Punching Operator

B, shearing machine operator

C, rig operators

99. When the lathe operator goes to work, which of the following clothes meet the safety requirements?

First, cuff fastening

Wear a scarf when it is cold.

Unbutton your coat in hot weather.

100. What kind of masks should workers use when exposed to dust that may cause occupational hazards?

A, gas mask

B, dust mask

C gauze masks are on 12 floor.

10 1, the production license system is implemented for special labor protection articles, and the products must be affixed with safety appraisal certificates. Which of the following protective articles are not special labor protection articles?

I. Safety helmet, safety belt and safety net

Anti-smashing, anti-static, conductive, acid and alkali resistant and insulating shoes

C, non-slip, heat-resistant, shockproof gloves

102, according to the provisions of GB50 140-2005, what kind of fire does the charged burning object belong to?

Class a and e fires

Class b and c fires

C, a fire

103, ethanol is on fire. What kind of fire extinguisher can't be used to put out the fire?

First, the carbon dioxide fire extinguisher

B. foam extinguisher

C, dry powder fire extinguisher

104, combustible solid fire, which kind of fire extinguisher should be used to put out the fire?

A, sodium bicarbonate dry powder fire extinguisher

B, ammonium phosphate dry powder fire extinguisher

C, carbon dioxide fire extinguisher

105. According to the regulations on fire safety management in warehouses, mobile lighting is not allowed in warehouses. Articles are not allowed to be stacked under the lighting fixtures, and the distance between the vertical lower part and the horizontal part of the stored articles shall not be less than several meters.

1. 0.3m.

B, 0.5 meters

C, 0.7 m

106. The lower explosive concentration of ammonia is 15% and the upper explosive concentration is 28%. What is the concentration of ammonia in the air that will form an explosive mixture?

1. Less than 15%

B, not less than 15% and not more than 28%.

C, when it exceeds 28%

107. The lower explosive concentration of cotton fiber is 100g/m3. How many cotton fibers does the air in the ventilation duct contain before it is in danger of explosion?

A, less than 100g/m3

B, equal to 100g/m3.

C, greater than 100g/m3.

108, which of the following chemicals will not flash?

I. Camphor

B, gasoline

C, hydrogen

109, what is the main fire extinguishing function of dry powder extinguishing agent?

First, suffocation

Chemical inhibition

C, cooling effect

1 10 what kind of decoration materials should be used for the ceiling of theaters, auditoriums, kindergartens, hotels with central air conditioning system, hotel rooms and public activity rooms?

First, incombustible materials

B, flame retardant materials

C, combustible materials

1 1 1. The portable fire extinguisher is hung on the wall, and the height of its top from the ground should not exceed several meters.

a， 1m

b， 1.2m

c， 1.5m

1 12. Which of the following fire extinguishers is wrong?

A, carbon dioxide fire extinguisher and foam extinguisher configuration in the same place.

B ABC dry powder fire extinguisher and BC dry powder fire extinguisher are arranged in the same place.

C clean water fire extinguishers and ABC dry powder fire extinguishers are arranged in the same place.

1 13. What kind of fire extinguisher is not suitable for flammable gas fire places?

I. foam extinguisher

B, carbon dioxide fire extinguisher

C, sodium bicarbonate dry powder fire extinguisher

1 14. Where should people stand when using a carbon dioxide fire extinguisher to put out the fire?

First, the downwind direction

B, against the wind

C, in any direction

1 15. What kind of fire extinguisher is suitable for extinguishing flammable solid, liquid and gas fires and charged fires?

First, the carbon dioxide fire extinguisher

B.ABC powder fire extinguisher

dry-chemical fire extinguisher

1 16. What is the fire extinguishing method that reduces the temperature of the fire below its ignition point and stops the combustion?

First, isolation and fire fighting

B, suffocation and fire fighting

C, cooling and fire fighting

What is the main function of carbon dioxide fire extinguishing agent?

First, suffocation

B, cooling effect

C, isolation

What is the main function of water fire extinguishing?

A steam generated by water heating and evaporation dilutes the air, which reduces the oxygen content.

B, water absorbs a lot of heat generated by combustion, so that the temperature of the ignition substance drops below the ignition point.

C, water attached to the surface of the fire, so that combustible substances do not contact with air.

1 19, the flash point of ethanol is 12℃, that of benzene is-1 1℃, and that of acetone is -20℃. Which of the three flammable liquids is the most dangerous?

First, ethanol

benzene

acetone

120, auto-ignition point of ether 170℃, auto-ignition point of methanol 455℃, auto-ignition point of benzene 555℃, which of these three flammable liquids is the easiest to spontaneously ignite?

ether

methyl alcohol

benzene

12 1. In the kitchen, bottled oil tanks are used to leak liquefied petroleum gas at the joint between the liquefied petroleum gas furnace and the rubber hose. Which of the following methods is incorrect when putting out the fire?

A, close the valve of the oil cylinder, and then put out the fire with a dry powder fire extinguisher.

B, put out the flame with a carbon dioxide fire extinguisher, and then close the valve of the oil cylinder.

C, can only use carbon dioxide fire extinguisher to put out the flame.

122, "Code for Fire Protection Design of Buildings" classifies the fire hazards of goods stored in warehouses into several categories?

A，A，B，C，D，e。

Flammable, flame retardant and nonflammable.

C, flammable, explosive, flame retardant, incombustible four categories

123. What materials should be used for curtains in hospital wards, kindergartens, nurseries and theaters?

First, flammable

B, flame retardant

C, flame retardant or nonflammable

124, which of the following fire extinguishers is correct?

A, BC dry powder fire extinguishers are arranged in the stacks.

B, in the distribution room configuration foam extinguisher.

C, configure carbon dioxide fire extinguishers in the computer room.

125, which method can be used to put out the fire when sodium metal is on fire?

A, covering the burning metallic sodium with dry sand

B, spraying metallic sodium with foam extinguisher.

C, spraying a carbon dioxide fire extinguisher on metal sodium.

126, which of the following belongs to Class C fire dangerous goods?

1. Methanol with a flash point of 1 1℃

B, cotton cloth

calcium carbide

127. Which of the following production processes does not belong to Class A production process?

A, use toluene (flash point 6℃) as a solvent to dilute the paint.

B, use liquefied petroleum gas (explosion limit 2~ 15%) as fuel for heating.

C, fill the cylinder with ammonia (explosion limit 15~28%).

128, what materials can't be used to make appliances that come into contact with acetylene?

First, pure copper

B, stainless steel

C, copper alloy with copper content less than 70%

129, public gathering places must be inspected for fire prevention during business hours, at least once every few hours?

First, at least once every two hours

At least once every three hours

C, at least once every four hours

130. Employees in public gathering places receive fire safety training at least once every few years?

First, at least once every two years

At least once a year.

C, at least once every six months

13 1. Key fire control units should conduct fire fighting and emergency evacuation drills at least once every few years?

At least once every six months.

B, at least once a year.

C, at least once every two years

132, key fire control units should conduct fire safety training for employees at least once every few years?

At least once every six months.

B, at least once a year.

C, at least once every two years

133, which of the following does not violate the fire safety regulations?

A, large shopping malls stacked goods under the fire shutter.

B the fire doors leading to the closed fire stairs in the hotel are usually open.

C put the fire extinguisher in a conspicuous place, discharge it according to the regulations or put it in a place where the fire box is easy to get.

134, system security analysis and risk assessment originated in ().

I. Personnel safety

B, equipment safety

C, product quality

135. In order to prevent accidents, who should take part in the prevention work and take responsibility?

A. Employer

B, the workers themselves

C, employers and workers themselves.

136. What kind of fire extinguishers should be equipped in the sewing workshop of a garment factory?

A, carbon dioxide fire extinguisher

B.ABC powder fire extinguisher

dry-chemical fire extinguisher

137, according to the fire classification standard, what kind of fire is Class B fire?

A, metal fire

B, solid materials on fire

C liquid fire or meltable solid fire

138. If the upper limit of the temperature range of the fire extinguisher is 55℃, what are the requirements for the ambient temperature of the place where the fire extinguisher is placed?

First, it cannot exceed 55℃

B, try not to exceed 55℃.

C, can't exceed 55℃ for a long time.

139, in case of combustible gas fire, what is the danger if the flame is extinguished without cutting off the combustible gas supply?

A, combustible gas and air mixed to form explosive mixture explosion.

Combustible gas resumes combustion.

C, flammable gas leakage pollutes the environment

140, which of the following fire extinguishing methods is feasible?

When putting out the oil fire, use chemical foam extinguisher first, and then use BC dry powder fire extinguisher.

B, when fighting class E fire, use BC dry powder fire extinguisher first, and then use ABC dry powder fire extinguisher.

C, put out the combustible gas fire, first use carbon dioxide fire extinguisher, then use BC dry powder fire extinguisher.

14 1, which of the following fire extinguishing methods is correct?

A, 6 kv transformer fire with carbon dioxide fire extinguisher charged fire.

B, 380 v motor fire with carbon dioxide fire extinguisher charged fire.

C, TV set fire with foam extinguisher.

142. In the cold season, the oil cylinder in the kitchen has insufficient gas supply and the fire is not fierce enough. What can be done to increase the gas output?

First, the gas cylinder is flat

B, heating the gas cylinder with an electric furnace.

C, heating the gas cylinder with warm water below 40℃

143. What kind of fire extinguishers should the hotel kitchen be equipped with?

First, the carbon dioxide fire extinguisher

B. foam extinguisher

C.ABC powder fire extinguisher

144 and 150 watt bulbs should be equipped with what kind of lamp holders?

A, porcelain lamp holder

B, bakelite lamp holder

C, waterproof lamp holder

145. how many volts of AC power should be used for portable lighting (that is, traveling lights) when working in metal cans?

I. 36 volts

B, 24 volts

C, 12 volt

146. what is the leakage current value of household leakage circuit breaker to prevent personal electric shock?

First, no more than 30 ma

B, no more than 50 ma

C, no more than 75 ma

147, which method can't be used for laying electrical lines in explosive and dangerous places?

A, insulated wire Ming fu

B, insulated wire wear steel pipe laying

C, cable laying

148. When rescuing an electrocuted person who has stopped breathing with cardiopulmonary resuscitation, what is the ratio of pressing and blowing?

A. blow every 5 times 1 time.

B, blow twice every time you press 15.

C. Blow twice every time you press 10.

149, which current path is the most dangerous when people get an electric shock?

A, chest to left hand

B, left foot to right foot

C. From right hand to left hand

150, which of the following measures belongs to direct contact protection in electric shock protection measures?

A, protective grounding

B, leakage protection

C. thermal insulation

15 1. What does it mean that there is a clear permanent embossed mark "EX" on the shell of electrical equipment?

A, it is electrical equipment with safety certification.

B, it is explosion-proof electrical equipment.

C, it is energy-saving electrical equipment.

152, when using submersible pump, which of the following behaviors is prohibited?

A, pull the cable or outlet pipe to put the water pump into the water.

B, put the pump in a strong bamboo basket, and then put it into the water.

C, first cut off the power supply and then put the water pump into the water.

153, what protection does the fuse on the lighting power supply line have?

First, overload

B, short circuit

C, overload and short circuit

154, what electrical instrument is commonly used to measure insulation resistance?

A. multimeter

B. megohmmeter

C. ohmmeter

155, when giving mouth-to-mouth artificial respiration to adults who have been electrocuted, how much air is appropriate?

1. 0.3~0.5 liters

B, 0.8~ 1.2 liter

C, not less than 1.5 liters

156, grounding is the easiest way to eliminate the harm of static electricity, which static electricity is mainly used for fire fighting?

First, the static electricity on the conductor

B, static electricity on insulator

C, static electricity on flammable liquid

157, single-phase two-hole socket installation wiring, which hole is the phase line connected?

A, the hole faces the right side of the socket

B, the hole faces the left side of the socket.

C, both holes will do.

158, in the lighting circuit, what are the requirements for installing a unipolar power switch to control the lights?

A, the switch is installed on the zero line of the power supply

B, the switch is installed on the phase line of the power supply.

C, the switch can be installed on the zero line or phase line of the power supply.

159, which of the following power supplies cannot be used as the power supply of safe voltage?

A, safety isolation transformer

B. Battery

C, autotransformer

160, motor vehicles carrying explosives, inflammable and explosive chemicals, toxic, radioactive and other dangerous goods, should be in the approved place, according to the specified time, route and speed, hang warning signs and take necessary safety measures.

A. Local governments

B, production safety supervision and management departments

C, public security organs

16 1. Class III hand-held power tools should be used for metal spherical tanks. If class II hand-held power tools are used, what protective devices should be installed on the power cord?

I. Thermal relay

B, leakage protector

C, pressure loss release

162. Which of the following circuit faults will not cause fire?

A, insulation damage caused by short circuit

B, poor contact

C, power failure

163. What are the dangers caused by serious overload of non-flame retardant insulated wires?

First, the line voltage loss increases

B, voltage instability

C, fire

164. when installing a single-phase bipolar breaker, how to connect the phase line of the power supply?

A, facing the knife switch, the phase line is connected to the left knife.

B, facing the knife switch, the phase line is connected to the right knife.

C, connected to any knife

165. Increasing air humidity can eliminate electrostatic hazards. What is its function?

A, reduce the generation of electrostatic charge

B, reduce electrostatic charge accumulation

C. neutral and static charges.

166, replacing belt drive with gear drive can prevent electrostatic hazards. What is its function?

A, reduce the accumulation of electrostatic charge

B, neutral charge and electrostatic charge

C, eliminate the source of electrostatic charge.

167, the key problems of fault tree analysis and drawing are:

First, analyze the logical relationship of technical system

B, know the symbols of graphics

C, can draw a beautiful fault tree diagram.

168, personal electric shock accident, what measures should be taken first in rescue?

A, immediately check whether the person who gets an electric shock still has heartbeat and breathing, and if not, immediately perform cardiopulmonary resuscitation.

B, immediately disconnect the power supply, so that the electric shock is separated from the live part.

C. Call an ambulance immediately by calling 120.

When installing 169, single-phase three hole socket, in which direction must the jack connecting the protection line be installed?

Left or right?

B, down

C, go up

170, how many volts of power do you need for local lighting of the machine tool?

I. 220 Volts

B,110v

C, less than 36 volts

17 1. How many meters should the height of 220v lighting lamps in production workshops, offices, shops and houses be from the ground?

I. 2.5 meters

B, 2 meters

c， 1.8m

172. How many times do you give artificial respiration to adults who get an electric shock every minute?

I, 8 to 10 times

B, 10 to 12 times.

C, 12 to 16 times.

173. Who should be responsible for the wiring and maintenance of welding machine power supply?

First, an electrician with a special operation certificate

B, welder with special operation certificate

C, electrician or welder with special operation certificate

174. When welding equipment with electrical grounding protection, which of the following operations should be performed first?

A, temporarily remove the grounding protection line of the equipment

B, increase the cross section of equipment grounding protection line

C. The equipment is repeatedly grounded.

175, which of the following operations does the welder need not cut off the power first?

First, replace the weldment that needs to be connected to the secondary circuit.

B. When replacing covered electrode,

C, when replacing the fuse

176. Which of the following operations of welders is illegal?

A, when transferring the work place, move the welder under the condition of cutting off the power supply of the welder.

B, check the fault of the welding machine after cutting off the power supply.

C, live welding machine connector.

177, which of the following operations of gas welder are illegal?

A, install an anti-backfire device on an acetylene bottle

B, when going to eat at noon, put the pressure welding gun connected to the air source in the large metal spherical tank under construction.

C, dynamic welding gas, acetylene cylinder valve can only turn 3/4 times.

178. Which of the following gas welders does not violate the requirements for the safe use of oxygen cylinders?

A, install oxygen pressure reducer with gloves stained with oil.

B, oxygen cylinder recumbent use

C, oxygen cylinder pressure dropped to 0.65438+/-0 MPa to replace the new cylinder.

179. When using acetylene cylinders, which of the following behaviors does not violate the requirements for safe use?

A, don't use up all the acetylene in the bottle, leaving a certain residual pressure.

B, immediately after the pressure reducer is installed and used, put the gas cylinder upright and horizontally.

C, don't install and use the flashback.

180, which parts of mechanical equipment should not be painted red?

I. Brake control handle

B. spokes of pulley

C, protective railings

18 1. What kind of operation can't the forklift do?

I. Short-distance transportation of bulk materials

B, excavation work

C, loading operation

182. Who should the crane driver send the emergency stop signal to immediately?

A, lifting command personnel

B, lifting site safety management personnel

C, is anyone there?

183, which of the following behaviors is prohibited?

A, try to lift the heavy object first, and then lift it after confirming that there is no danger.

B, use steel wire rope to bind both ends of the nitrogen cylinder firmly and then lift it directly.

C. If power is suddenly cut off during lifting, pull all controller handles back to zero.

184, when operating the woodworking circular saw machine, which of the following acts is illegal?

1. Reach over the saw blade to get the wood.

B when the saw blade rotates, use a long stick to remove the sundries on the table.

C, push the wood with a stick

185, according to the provisions of GB5083- 1999, safety protection devices must be set for exposed dangerous parts and parts such as drive belts, shafts, couplings, gears and flywheels whose height is less than several meters based on the plane operated by operators?

One or two meters

B, 2.5 meters

C.3 meters

186. What kind of safety device does the safety valve belong to?

First, interlocking

B, overrun insurance

C. monitoring and control

187, what is the function of safety devices of mechanical equipment?

A, in the event of equipment failure, failure or operational error, protect the safety of personnel and equipment.

Energy saving

C, improve production efficiency

188. what kind of work is it to lift half of the objects buried underground with a crane?

I. Normal operation

B, illegal operation

C lifting safety measures for dangerous operations shall be formulated in advance.

189, which safety technical measures should be given priority in mechanical equipment design?

I. Direct safety technical measures

B, indirect safety technical measures

C, indicative safety technical measures

190, which of the following acts is illegal?

A, clean up the debris with an iron hook

B, putting the workpiece into a stamping die by a fixture.

C when the workpiece rotates on the lathe, measure the size of the workpiece with a caliper.

How many of the following three forklift operations are illegal? (1) Lift the personnel with the bucket of a forklift for high-altitude operation (2) Carry out maintenance under the lifted bucket (3) Shovel the materials on the ship directly to the dock shore.

One kind, one kind

two kinds

C, three kinds

192, which of the following three metal chip processing machines meets the safety requirements?

A disconnect the tool from the workpiece before stopping the machine.

B, put your hand on the rotating workpiece and pick up the measuring tool.

C, directly take away the chips wound on the workpiece by hand.

193, which of the following forklift operations violates the requirements of safe operation? (1) Forks are used to push the goods to move; (2) the fork carries people; (3) Enter the inflammable and explosive warehouse for operation.

(1) and (2)

B, (2) and (3)

c 、( 1 )、( 2 )、( 3)

194. Which of the following regulations should be observed when a bridge crane walks with heavy objects? (1) It is forbidden for heavy objects to pass above people and equipment; (2) When there is no obstacle on the route through which the heavy object passes, the bottom of the heavy object is more than 2 meters from the ground; (3) No one is allowed to stay on the crane.

(1) and (2)

B, (1) and (3)

c 、( 1 )、( 2 )、( 3)

195. Open-air operation. Should the gantry crane stop working when the wind reaches the first level?

A, level 5 or above

B, level 6 or above

C, Grade 7 or above

196. What kind of safety device does the travel limit switch on the crane track belong to?

I. Overlimit insurance

B, interlocking

C. monitoring and control

197 according to GBZ 1-2007, what is the hygienic limit of noise level in the workplace after being exposed to noise for 4 hours every day?

85 decibels (a)

88 decibels (a)

C, 9 1 db (a

198. In hot season, workers working at high temperature should supply cold drinks with salt content of 0. 1%~0.2%. How high should the water temperature of the drink be?

I. 25℃

b、20℃

c、 15℃