(A) Modulus of elasticity
(B) Modulus of rigidity
(C) Bulk modulus
(D) Poisson’s ratio
MECHANICAL ENGINEERING
Thermit welding is often used
(A) replacing broken gear tooth.
(B) repairing broken shears.
(C) joining rails, trucks and locomotives frames.
(D) A11 of the above
Gear burnishing is a process for
(A) surface finishing.
(B) under cut gears.
(C) producing cycloidal gears.
(D) removing residual stress from teeth roots.
A diamond locating pin is used injigs andfixtures because
(A) diamond is very hard and wear resistance.
(B) it occupies very litde space.
(C) it helps in assemble with tolerance on canter
distance.
(D) it has long life.
Jigs are used
(A) for holding and guiding the tool in drilling,
reaming or tapping operations.
(B) for holding the work in milling, grinding,
planning or turning operations.
(C) to check the accuracy of the work piece.
(D) None of the above
Which of the following processes is used for preparing parts having large curved surfaces and thin sections?
(A) Hot machining
(B) Ultrasonic machining
(C) ECM process
(D) Chemical milling
In Electro-chemical machining the gap between tool and work piece is kept as
(A) 0.1 mm
(B) 0.25 mm
(C) 0.4 mm
(D) 0’75 mm
In ultrasonic machining tool is made of
(A) Tungsten carbide
(B) Brass or Copper
(C) Diamond
(D) Stainless steel
In a hot chamber die casting machine
(A) melting pot is separate from the machine.
(B) meltingpotis an integralpart ofthe machine.
(C) melting pot may have any location.
(D) low temperature and pressure is used.
In a hot chamber die casting machine
(A) melting pot is separate from the machine.
(B) melting pot is an integral part of the machine.
(C) melting pot may have any location.
(D) high temperature and pressure is used.