KMC JE (MECHANICAL) MEMORY BASE QUESTION SET 1

 KMC (MSCWB) JE/SAE MEMORY BASE PREVIOUS YEAR QUESTION SET 1

1 – Which one of the following is not a fusion welding process?

1) Gas welding
2) Arc Welding
3) Brazing
4) Resistance Welding

... Answer is…
Brazing

2- The speed ratio of a Pelton wheel operating under a head of 900m is 0.45. What is the peripheral velocity of the turbine wheel?

1) 28 m/s
2) 42 m/s
3) 50 m/s
4) 60 m/s

... Answer is
60 m/s

3- Primary objective of full annealing is to -

1) increase toughness and yield point
2) reduce ductility and resilience
3) remove foreign impurities and improve surface finish
4) increase ductility and machinability

... Answer is
increase ductility and machinability

4 – A lead screw with half nuts in a lathe, free to rotate in both directions has

1) V-threads
2) Whitworth threads
3) Buttress threads
4) Acme threads

... Answer is
Acme threads

5 – Hardness of steal is greatly improved with

1) Annealing
2) Cyaniding
3) Normalizing
4) Tempering

... Answer is
Tempering

6 – 18-4-1 high speed steal contains

1) 18% nickel
2) 4% chromium
3) 1% cobalt
4) none of the above

... Answer is
4% chromium

7 – Identify the hardest tool material

1) steel
2) ceramics
3) tungsten
4) diamond

... Answer is
diamond

8 – Polythene is

1) Vulcanized rubber
2) Impregnated cotton
3) Polymer of ethylene
4) Cellular wood

... Answer is
Polymer of ethylene

9 – A decorative and coloring effect is imparted to plastics by adding

1) Zinc oxide
2) Aluminum oxide
3) Phosphate
4) Potassium Sulphate

... Answer is
Zinc oxide

10 – Materials after cold working are subjected to flowing process to relieve stresses

1) tempering
2) normalizing
3) annealing
4) hot working

... Answer is
annealing

11 - Magnetic particle inspection uses small ferromagnetic particle similar to

1) permanent magnet filling
2) copper fillings
3) carbon fillings
4) Iron fillings

... Answer is

12 - A reverted gear train is made of 4 gears having same circular pitch in which driver gear has 45 teeth and driven gear has 30 teeth. An intermediate gear of 15 teeth is connected with the driver gear. what will be the number of teeth of other intermediate gear connected with the driven gear?

1) 20
2) 30
3) 45
4) 60

... Answer is

13 - In inventory control, the economic order quantity refers to

1) lowest level to inventory
2) lot most economical to process
3) optimum lot size
4) Lot corresponding to break even point

... Answer is

14 - Routing and scheduling are integral part of

1) product planning
2) work study
3) job analysis
4) quality control

... Answer is

15 - To satisfy the condition as regards evenness of torque, the firing order of a four cylinder engine is

1) 1-2-3-4
2) 1-3-2-4
3) 1-3-4-2
4) 1-4-3-2

... Answer is

16 - Morse test in multi cylinder engine is done to determine

1) air flow to the engine
2) volumetric efficiency
3) indicated power
4) mechanical efficiency

... Answer is

17 - What will be the velocity ratio of a first system of pulley if there are three pulleys in the system

1) 3
2) 6
3) 9
4) none of the above

... Answer is

18 - Which of the following has highest optical clarity

1) ABS
2) Acrylics
3) Cellulose
4) Phenolics

... Answer is

19 - A motor running at 150 RPM drives a pump shaft by means of belt drive. the diameter of motor Pulley is 55 cm and that of the pump shaft is 33 CM, then pump shaft will rotate at

1) 200 RPM
2) 180 RPM
3) 230 RPM
4) 250 RPM

... Answer is

20 - Which of the following is extensive property of a thermodynamic system

1) Pressure
2) temperature
3) density
4) volume

... Answer is

21 - which of the following non destructive test is used to detect any change in composition of any material

1) liquid penetration test
2) radiography
3) ultrasonic
4) all of these

... Answer is

22 - in a flat belt drive tension on the tight side of belt is 250 Newton and tension on the slack side of belt is 180 Newton. the initial tension on the belt is

1) 430 Newton
2) 70 Newton
3) 215 Newton
4) none of the above

... Answer is

23 - discharge through rectangular weir varies as

1) H
2) H^2
3) H^(5/2)
4) H^(1/2)

... Answer is

24 - in ABC analysis, the C items are those which represent

1) small percentage of the total annual consumption value
2) high percentage of the total annual consumption value
3) small percentage of the closing inventory value
4) high percentage of closing inventory value

... Answer is

25 - a washer is generally used to

1) absorb shocks and vibration
2) provide greater bearing area
3) provide cushioning effect
4) Character of motion

... Answer is

26 - zeroth law : temperature :: second law : __________.

1) efficiency
2) enthalpy
3) internal energy
4) entropy

... Answer is
entropy

27 - Lewis equation in gear is used to find the

1) compressive stress in bending
2) tensile stress in bending
3) fatigue stress under dynamic load
4) shear stress due to torsion

... Answer is

28 - the gear is manufactured on generating principle in

1) hobbing
2) milling
3) forming
4) broaching

... Answer is

29 - In circular taper job larger diameter is 80 mm, smaller diameter is 70 mm, and the conicity is 1/20. what will be the length of taper?

1) 180 mm
2) 195 mm
3) 198 mm
4) 200mm

... Answer is

30 - a steel shaft of 25 mm diameter is turned at a cutting speed of 50 metre per minute. what will be the RPM of the shaft?

1) 637
2) 520
3) 480
4) none of the above

... Answer is

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