A man attempts to open the door by trying keys at ran The key for a door is in a bunch of 10 keys. A man attempts to open the door by trying keys at rando A man of mass m runs without sliding from rest from one end of a boat of mass M and length l with an Look at the graph.
Water pump handle is long, why? Draw diagrams to illustrate the positions of fulcrum, load and effort, in each of the following : a Disclaimer The questions posted on the site are solely user generated, Doubtnut has no ownership or control over the nature and content of those questions. Bhargav said: Jul 1, Can any one explain about the types of levers and give some examples please? Deekshit said: May 24, Bhargav. The type 1 lever fulcrum is in between load and effort effort is near to fulcrum.
The type 2 lever load in between fulcrum and effort. The type 3 lever effort in between fulcrum and load. Sanjit Kumar said: Sep 25, Short tricks: 1. It is a Class 1 lever because the fulcrum is between the load and the effort force. The bell crank lever is used when the effort force must be at an angle, usually a right angle, to the load. Current Affairs Interview Questions and Answers.
Manoj Prasad said: Aug 17, Levers shall be straightened where required to maintain proper alignment. It shall be ensured that all parts of the lever frames including spare levers and their tappets are intact. Marking shall be done with the help of templates and the outline punch marked.
In the case of catch handle locking, it is most important that the catch rod and links are in correct position before marking. It is a good practice to operate the catch handle several times, both in the normal and the reverse positions, in the case of catch handle locking and operate the lever several times in the case of Direct Lever Locking before the notches are actually marked.
While doing so, the catch block shall be properly held against the quadrant. Normal and reverse notches for point levers and those signal levers which have back tails or long leads may be cut with a small clearance up to 1 mm. Notches of straight edge locks may have a clearance up to 3 mm for the straight edge of the lock.
Where necessary, the joints shall be made smithy welding. The welded bars shall be kept truly straight and perfect in shape. Locks dogs shall have free movement in the channels of the locking box. In the case of catch handle operated locking, it shall not be possible to raise the catch handle block more than 10 mm; iv The locking shall be strong, durable and accurate. It shall not be possible for any mechanical lock to enter a notch other than that for which it is intended or to force the locking.
The covers shall be padlocked and sealed. The locking shall then be carefully checked and compared with the approved Locking Diagram and tested by pulling of individual levers against the approved Interlocking Table as per instructions laid down in Chapter XIII.
When requisitioning new mechanical interlocking locks dogs , the locks dogs required must be specified by quoting the type number shown against each lock on the standard drawings. Signal and Telecommunication Engineer in charge of the section when a new interlocking frame or an alteration to the existing interlocking frame is ready for his test and introduction. Down rods shall normally have mm stroke. Alternatively a rodding compensator can be installed in a curved alignment by making straight runs on either side of it connected to the compensator cranks.
S Specification No. Runs of rodding shall normally be in a straight alignment. The top of the rodding shall not be less than 25 mm below the bottom of the rails. Whenever possible, the running of rods under rail joints shall be avoided.
On curves the distance apart shall be 1. Note : Only solid rodding shall be used in future Offsets of 90 mm may, however, be made where solid rodding is used. The minimum length of the offset shall not be less than twice the amount of the offset. Where more than one offset is necessary, a guide shall be provided.
When making offsets in joints, the pin shall be kept in place to keep the pin holes true. Where trestles of rollers are of the built up type, outside segments shall be fixed with two bolts or screws and intermediate segments with one bolt at alternate ends. Soil shall be well rammed round the foundations. Care shall be taken to see that the throw on a crank or compensator is the same on each side of the centre.
The rod connecting the lug and the crank shall not be less than 0. Point adjusting screws shall be so installed as to permit equal adjustment in both directions. Spring washers shall be used where bolts are used in conjunction with steel and cast iron components.
This springing shall normally be 12 mm on the lever quadrant. With the obstruction in, it shall not then be possible for the lever working the facing point lock to be latched. Spring point levers self-reversing shall be installed in accordance with approved plans.
NOTE : In new installations, outside lock bars shall not be used ; ii An inside lock bar lies 38 mm below the top of the rail and the bar does not lean away from the rail. A lock bar clip shall be fixed as near the end of the bar as possible but not more than mm. Under special circumstances and only if other electrical means cannot be provided, lock bars can be installed over check rail portion when they are fitted with a special type of check rail joint Deviations shall be sanctioned by the competent authority.
On curves, signal arms shall be at right angles to an imaginary line drawn from the signal to the point where the best view is to be provided to the driver. It shall be ensured that counterweights are in their correct position and firmly secured and that the lock nuts on adjustable joints are tight.
Counterweights shall be securely fastened to the levers and safety bolts provided at the end of the levers. However, where electric lighting of Distant Signals is provided, the Distant Signals in Multiple aspect area may show atleast one back light in the 'ON' position if the arrangement is such that the bottom light is lit only when the arm is displaying the 'attention' aspect.
Signal and Telecommunication Engineer incharge of the section shall be informed so that he may arrange for the removal or cutting of the trees.
Signal post guys, where provided shall be kept tight and in good repair. Missing or defective boards shall be replaced. Roundels of electrically lit signals shall be cleaned by signal staff. With the obstruction in, the signal slide shall get locked. For periodic and convenient renewal, wires on either side of the pipe shall be terminated and provided with links. Angle pulleys shall be kept to a minimum as they cause loss of stroke.
Additional stakes shall be provided if necessary. The top pulleys shall carry the wires having the longest run and the pulleys below successive shorter runs. Sl, shall be used for signal connections.
Twists, kinks and nicks shall be avoided. When bolts and nuts are used, the ends of the bolts shall be burred to prevent thefts. To reduce the sag in the wire run, the stakes may be fixed at a spacing closer than 10 metres where required.
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