Production Engineering MCQ Questions with Answers
31-In Electro Discharge Machining (EDM), the tool is made up of:
(A) Brass
(B) Cast iron
(C) Copper
(D) All of the above
32-In Thermit welding, aluminum and iron oxide are mixed in proportion of
(A) 2 : 1
(B) 1 : 1
(C) 1 : 2
(D) 1 : 3
33-The process of making hollow casting from permanent mould by close fitting core is called
(A) Centrifugal casting
(B) Pressed casting
(C) Slush casting
(D) Die casting
34-In chemical milling process, the chemical reagent of steel work piece is:
(A) Sodium chloride
(B) Caustic soda
(C) Sodium sulphate
(D) Nitric acid
35-The binder in case of synthetic sand is:
(A) Bentonite and water
(B) Water
(C) Molasses
(D) Clay
36-If ball bearing is to be fitted on a shaft, the fit between the inner race of bearing and the concerned shaft will be _______ fit.
(A) Transition
(B) Clearance
(C) Interference
(D) None of the above
37-In case of gas welding, the flux is
(A) Not used
(B) Used as powder
(C) Coated on electrodes
(D) None of the above
38-In arc welding, the electric arc is produced between the work and the electrode by
(A) Flow of current
(B) Contact resistance
(C) Voltage
(D) All of the above
39-In submerged arc welding, an arc is produced between a
(A) Two tungsten electrodes and the work
(B) Bare metal electrode and the work
(C) Metal electrode and the work
(D) Carbon electrode and the work
40-Which of the following is example of plastic welding?
(A) Forge welding
(B) Thermit welding
(C) Arc welding
(D) Gas welding
ANSWERS:
31-(D), 32-(D), 33-(B), 34-(D), 35-(A), 36-(C), 37-(B), 38-(B), 39-(B), 40-(A)