A, leakage current b, normal current c, irregular current d, stray current
48, (a) shape of the shell explosion pressure is the largest.
A, spherical b, rectangular c, square d, triangle
49. The air temperature below the inlet wellhead must be above (A )℃
a、2 B、3 C、0 D、 10
50, 30. The temperature of mining face in production mine shall not exceed (b).
a、30℃ B、26℃ C、40℃ D、20℃
Second, multiple-choice questions:
1, the braking torque of disc brake is insufficient, because (ABC).
A. Fatigue of disc spring B. Excessive clearance between brake and brake disc.
C, residual pressure is too large
2, winch drum wire rope arrangement is not neat, its harm is (AB).
A, accelerate the wear of the steel wire rope; b, make the steel wire rope slide out of the edge of the drum.
C, easy to make the wire rope elongation
3. The advantage of secondary braking of winch is (AC).
A, ensure the parking balance b, can reduce the residual pressure.
C, prolong the service life of wire rope
4. When welding in coal mines, the following provisions shall be observed: (ABC)
First, the welding position is limited
B, accept that there are noncombustible materials under the Mars workplace.
C, workplace romantic, gas concentration should be less than or equal to 0.5%.
5. The main reason for gear damage of winch reducer is (ABCD).
A, gear teeth are broken b, tooth surface is worn.
C, tooth surface fatigue pitting D, gluing
6, hoist in (ABCDE), should implement the monitoring system.
A. Lifting personnel B. Transportation of dangerous goods
C. Hoisting large equipment and equipment D. Overhauling shaft facilities E. Driving by trainee drivers
7, hoist in operation (ABCD), and so on and so forth, should use the safety brake for emergency braking.
A. Service brake failure B. Emergency stop signal
C. Close to the normal parking position and unable to slow down D. Emergency parking failed.
E. Unknown unexpected signal
8, hoist in the process of operation (ABCD), and so on and so forth, should immediately power off, brake with work brake, stop halfway.
A. The current is too large and the acceleration is too slow to start. B. the running part makes abnormal noise.
C. Unexpected signals with unknown conditions D. Too many deceleration points can't slow down normally.
E. approach the normal parking position without slowing down.
9, elevator brake shoe contact area is less than 60% of the brake shoe area, will cause (ABC)
A. Overheating of brake shoes B. Burned brake shoes C. Insufficient braking capacity
10, the common deceleration method of hoist is (ABC).
A. Motor deceleration B. Inertia sliding deceleration
C. Brake deceleration D. Reverse electric jacking
1 1, the following does not belong to the mechanical part of electric locomotive is (B D)
A, frame b, traction electric vehicle c, air compression system d, lighting device
12, sports car protection device is divided into (A D)
A, normally open type B, disconnected type C, non-open type D and normally closed type
13, the following belongs to the double loading is (A B)
A, two people grab B, two people carry C, two people carry D, and many people carry D.
14. When the train breaks down in operation or the transportation line breaks down, it is necessary to inform the driver to stop urgently (A B).
A, miner's lamp quickly swings up and down many times b, propaganda
C, the car lights quickly turn on and off several times d, gestures.
15, according to the different transmission energy, brake can be divided into (B C).
A, band brake B, hand pressure type C, pneumatic type D, block brake
16, the following belongs to the commonly used hemostasis method is (A C)
A, shiatsu method b, band-aid method c, tourniquet method d, bandaging method
17, the following belongs to the harm of coal dust is (A B)
A, causing occupational diseases B, burning or explosion C, suffocation D, poisoning
18, sports car protection device is divided into (A D)
A, normally open type B, disconnected type C, non-open type D and normally closed type
19, the following belongs to the mine water omen is (A B)
A, hang sweat b, hang red c, slag d, roof leakage
20, the following belongs to the basic content of safety education and training is (B D)
A, safety first b, safety awareness c, comprehensive management d, safety knowledge
Third, true or false:
1, transformer oil for underground use, etc. Bring it when necessary and seal the rest in a bucket for later use. (? )
2、? One shot and three inspections? After that, the gas concentration shall not exceed 1.5% before the corresponding work can be carried out. (? )
3, the location of the gas probe layout, from the roof (beam) is greater than 300 mm, from the roadway side wall shall not be less than 200 mm ... )
4. It is forbidden to ventilate in series in the jet prominent area. (? )
5, local gas accumulation site 10 meters range shall not be shooting. (? )
6. Lower the car and allow some ropes. (? )
7. When starting the small winch, you can press the two brake handles together. (? )
8, small winch in operation, if there is broken rope, claw rope, abnormal sound phenomenon, can continue to run. (? )
9, winch driver after hearing the stop signal, should brake, loosen the clutch, stop, power failure. (? )
10, after normal parking, the alarm red light does not go out, but the control switch must be blocked by power failure. (? )
1 1. When water seepage occurs and the lighting and road signs in the roadway are destroyed, the field personnel should retreat in the direction of the uphill roadway where the airflow passes. (? )
12, after being rescued by the buried wounded, the well should be quickly raised without inspection. (? )
13, filter self-rescuer should pay attention to maintenance, generally available for 5 years, without regular inspection. (? )
14. If someone gets an electric shock, pull him out of the power supply quickly. (? )
The function of the car stopper is to prevent the vehicle from falling off the road. ( ? )
15, the wellhead signal device must be locked with the winch control loop, and the winch can only be started after the wellhead bell man signals. ( ? )
16, start-stop signal, accident signal and indication signal are all acousto-optic signals. ( ? )
17, cage hoisting, start signal should be positive, stop signal and accident signal should be instantaneous. ( ? )
18, the car cage does not need to be equipped with a car stopper. ( ? )
19. When the vertical depth of the main inclined shaft from top to bottom exceeds 50m, the personnel shall be transported by machinery. ( ? )
20. Trains loaded with explosives can transport other articles at the same time. ( ? )
2 1, it is forbidden to tap other loads on the direct power supply line of the hoisting personnel and the main wellhead winch signal device. (? )
22, succession and personnel up and down the well, it is forbidden to transport explosive materials. ( ? )
23, roadway maintenance can be dismantled before supporting. ( ? )
24, scraper conveyor can take personnel. ( ? )
25, in the inclined shaft, installation can stop running interrupt rope, decoupling car sports car protection device. ( ? )
26. The air intake shaft is located in the center of the wellhead, and each wing is equipped with a return air shaft, which is called diagonal (? )
27. The resistance-increasing adjustment method is realized by adjusting the wind window. (? )
28, mine fire refers to the fire that happened in the underground. ( ? )
29. After the bell man sends out the driving signal, it is not necessary to send out the stop signal when the signal needs to be changed under special circumstances, and it can be changed immediately. (? )
30. After the inclined lane is closed, after detailed inspection, the hook worker can improve the trial operation. ( ? )
3 1, when people are transported by car in inclined shaft, they must sit on the tail car with the lathe operator. ( ? )
32, harvesters buffer is to control the speed of harvesters. (? )
33, harvesters buffer must highlight the trunk 100 mm above ... )
34, 1 ton standard car gauge is 750 mm ... )
35, car stopper can be divided into single car stopper and compound car stopper. (? )
36. The function of the car stopper is to prevent the vehicle from falling off the road. (? )