QUESTION CARRY 2 MARK
A cylindrical vessel having its height equal to its diameter is filled with liquid and moved horizontally at an acceleration equal to acceleration due to gravity. The ratio of liquid left in vessel to the liquid at static equilibrium condition will be ………………..
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Solution
QUESTION CARRY 2 MARK
A continuous supply of 40 V and 300 A is used in arc welding to produce a weld bed of 50 mm2 area. Specific energy required for electrode and base metal is 14 J/mm2.The average welding speed for 90% efficiency in energy utilization will be ………………..
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Solution
QUESTION CARRY 2 MARK
Consider the following pairs :
Heat treatment Eflects on medium carbon
steel
1.Normalising : Grain refinement
2.Full annealing : Uniform grain structure
3.Martempering : Decreased ductility
4.Spheroidizing : Maximum softness
Which of the pairs given above correctly matched?
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Solution
All pairs are correctly matched.
QUESTION CARRY 2 MARK
Two plates are joined by single transvers and double parallel fillet welds as shown in figure. If the size of the fillet is 5mm and allowable shear load per mm is 300 N,then approximate lenght of each parallel fillet will be………………..
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Solution
Allowable shear load = 300 N
Total length of weld = 2L + 100
Allowable shear load = 300 × (2L+ 100)
150 × 103= 300 (2L+ 100)
2L+ 100 = \(\frac{150}{300}\) × 103= 500
⇒2L= 400 ⇒ L = 200 mm
QUESTION CARRY 2 MARK
Last year, a manufacturer produced 15000 products which were sold for ₹300 each. At that volume,the fixed costs were ₹15.2 lacs and total variable costs were ₹21 lacs.The break even quantity of product will be………………..
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Solution
QUESTION CARRY 2 MARK
Manufacturing a product requires processing on 4 machines A,B,C,D in the order A – B– C – D. The capacities of four machines are A =100, B = 110, C = 120 and D = 130 unit per shift. If the expected output is 90% of the system capacity, then the expected output will be………………..
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Solution
QUESTION CARRY 2 MARK
A spur gear of 40 teeth is machined in a gear hobbing machine using a double start hob cutter. The speed ratio between the hob and the blank is ………………..
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Solution
In a double start hob eutler, 20 revolutions are completed by the hob for one revolution of blank i.e.
Speed ratio between hob and blank is 20 : 1
QUESTION CARRY 2 MARK
In the figure given below, A sphere is attached by the string to the wall. Then, the tension in the string will be………………..
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Solution
QUESTION CARRY 2 MARK
Amass of 2kg is attached at the end of a spring having a stiffness of 0.9 N/mm. Then the critical damping coefficient of this system will be ………………..
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Solution
QUESTION CARRY 2 MARK
Go and No Go gauges are to be designed fora hole \(24.000_{-0.020}^{+0.050}\)mm. Tolerances’ for Gauge may betaken as 9.1% of the tolerance for hole.By following ISO system of gauge design, the sizes of Go and No Go gauges will be ………………..
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Solution
Tolerance = 0.050 + 0.020 = 0.070
9% of above tolerance= \(\frac{9}{100}\) × 0.070= 0.0063 mm
Now, size of Go gauge = 24.000 – 0.020 + 0.0063
= 23.9863
And size of No Go gauge = 24.000 + 0.070 – 0.0063
= 24.0637