86851. Jigs are heavier than fixtures in construction.
86852. In electro-chemical machining, the gap between the tool and work is kept as
86853. The process of improving the cutting action of the grinding wheel is called
86854. The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is __________ cutting speed for drilling mild steel with high speed steel drills.
86855. In electro-discharge machining, the tool is connected to cathode.
86856. Broaching is applied for machining
86857. Half nut is used to lock the lathe carriage to the lead screw for thread cutting.
86858. The advantage of a broaching operation is that
86859. The tool life __________ as the cutting speed increases.
86860. The infeed grinding is used to
86861. The enlarging of an existing circular hole with a rotating single point tool is called
86862. In the relation VTn = C, the value of n for high speed steel tools varies from 0.25 to 0.40.
86863. Glazing in grinding wheels __________ cutting capacity.
86864. The usual value of the helix angle of a drill is
86865. The cutting speed for counter-boring should be __________ that of drilling operation.
86866. In drilling mild steel and brass, the point angle of a drill is 118°.
86867. The tail stock set over method of taper turning is preferred for
86868. The chuck preferred for quick setting and accurate centering of a job is
86869. Negative rakes are used for
86870. A bottoming tap has
86871. The effect of setting a boring tool above centre height leads to
86872. Which of the following statement is correct about nose radius?
86873. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
86874. In a centre lathe, the cutting tool is fed in __________ with reference to the lathe axis.
86875. The angle between the face of the tool and a line tangent to the machined surface at the cutting point is called cutting angle.
86876. The dressing and truing of grinding wheel are done with the same tools but not for the same purpose.
86877. The point angle of a drill, for drilling stainless steel, is
86878. A numerical method of identification of tool is known as tool signature.
86879. Tumbler gears in lathe are used to
86880. Segmental chips are formed during machining
86881. Cemented carbide tool tips are produced by powder metallurgy.
86882. If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is
86883. Side rake angle of a single point cutting tool is the angle
86884. Internal gears can be made by
86885. Loeffler boiler is a water tube boiler using a forced circulation of water.
86886. La-mont boiler, is a high pressure water tube steam boiler working on forced circulation.
86887. The function of a connecting rod is not to convert reciprocating motion of the piston into rotary motion.
86888. Which of the following statement is correct for a compound steam engine ?
86889. When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a
86890. The natural draught is produced by
86891. Willian's line for the steam engine is a straight line relationship between the steam consumption per hour and
86892. The temperature of condensate is __________ on leaving the condenser than that of circulating water at inlet.
86893. A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.
86894. A device used to increase the temperature of saturated steam without raising its pressure, is called
86895. The diameter of flue tube in a Cornish boiler is __________ that of the shell.
86896. An economiser __________ the steam raising capacity of a boiler.
86897. Fire tube boilers are
86898. A safety valve usually employed with stationary boilers is
86899. The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called
86900. The function of a crosshead is to guide motion of the __________ and to prevent it from bending.
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