Q. The arrival of customers over fixed time intervals in a bank follow a Poisson distribution with an average of 30 customers/hour. The probability that the time between successive customer arrival is between 1 and 3 minutes is____________(correct to two decimal places). Ans: 0.36 – 0. 40 Sol:
Q. An engine operates on the reversible cycle as shown in the figure. The work output from the engine (in kJ/cycle) is _________(correct to two decimal places). Ans: 62-63
Q. The viscous laminar flow of air over a flat plate results in the formation of a boundary layer. The boundary layer thickness at the end of the plate of length L is δL. When the plate length is increased to twice its original length, the percentage change in laminar boundary layer thickness at the
Q. A hollow circular shaft of inner radius 10 mm, outer radius 20 mm and length 1 m is to be used as a torsional spring. If the shear modulus of the material of the shaft is 150 GPa, the torsional stiffness of the shaft (in kN-m/rad) is____________(correct to two decimal places). Ans: 35.343 Sol:
Q. A local tyre distributor expects to sell approximately 9600 steel belted radial tyres next year. Annual carrying cost is Rs. 16 per tyre and ordering cost is Rs. 75. The economic order quantity of the tyres is (A) 64 (B) 212 (C) 300 (D) 1200 Ans: 300
Q. The preferred option for holding an odd-shaped workpiece in a centre lathe is (A) live and dead centres (B) three jaw chuck (C) lathe dog (D) four jaw chuck Ans: four jaw chuck
The preferred option for holding an odd-shaped workpiece in a centre lathe is Read More »
Q. Metal removal in electric discharge machining takes place through A. ion displacement B. melting and vaporization C. corrosive reaction D. plastic shear Ans: melting and vaporization Sol: In EDM, electric spark is the source due to which material undergoes fusion and vaporization.
Metal removal in electric discharge machining takes place through Read More »
Q. Feed rate in slab milling operation is equal to A. rotation per minute (rpm) B. product of rpm and number of teeth in the cutter C. product of rpm, feed per tooth and number of teeth in the cutter D. product of rpm, feed per tooth and number of teeth in contact Ans: product
Q. During solidification of a pure molten metal, the grains in the casting near the mould wall are A. coarse and randomly oriented B. fine and randomly oriented C. fine and ordered D. coarse and ordered Ans: fine and randomly oriented Sol: During solidification of pure metal at the surface of the mould due to
Q. Denoting L as liquid and M as solid in a phase-diagram with the subscripts representing different phases, a eutectoid reaction is described by A. M 1 → M 2 + M 3 B. L1 → M 1 + M 2 C. L1 + M 1 → M 2 D. M1 + M 2 → M 3 Ans: M 1 → M
