Related Questions

A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
A Ring nut
B Castle nut
C Sawn nut
D Jam nut
Locking may cause which of the following problems?
A Erroneous updates
B Deadlock
C Versioning
D All of the above
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
A Larger than
B Smaller than
C Equal to
D None of these
A screw will be self locking, if
A Friction angle is less than helix angle
B Friction angle is more than helix angle
C Friction angle is equal to helix angle
D Efficiency of screw is 100%
For a self locking machine, the efficiency must be
A Equal to 50%
B Less than 50%
C Greater than 50%
D 100%
The condition that causes vapour locking in a brake system is
A Overheating of the fluid due to frequent brake application
B Overcooling of the brakes during high speed driving
C Keeping the vehicle without use for an extended period
D An excessively high engine speed on a downhill road
Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed.
A True
B False
With SQL Server optimistic locking, an update lock is placed on the row when the row is read.
A True
B False
Elastic nut is a locking device in which
A One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B A slot is cut partly in middle of nut and then slot reduced by tightening a screw
C Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
D Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end
Jam nut is a locking device in which
A One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B A slot is cut partly in middle of nut and then slot reduced by tightening a screw
C A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end

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