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Role-specific Design Engineer Interview Questions & Answers:

1. Which of the following screw thread is used for power transmission in one direction only.

A. Acme threads
B. Square threads
C. Buttress threads
D. Multiple threads

Option C

2. The resistance to fatigue of a material is measured by

A. elastic limit
B. Young's modulus
C. ultimate tensile strength
D. endurance limit

Option D

3. The pipe joint mostly used for pipes carrying water at low pressures is

A. socket joint
B. nipple joint
C. union joint
D. spigot and socket joint

Option A

4. When a nut is tightened by placing a washer below it, the bolt will be subjected to

A. tensile stress
B. compressive stress
C. shear stress
D. none of these

Option A

5. In unilateral system of tolerance, the tolerance is allowed on

A. one side of the actual size
B. one side of the nominal size
C. both sides of the actual size
D. both sides of the nominal size

Option B

6. The material used for brake lining should have __________ coefficient of friction.

A. low
B. high

Option B

7. A column is known as a long column if the slenderness ratio is

A. 40
B. 50
C. 70
D. 100

Option D

8. In an ordinary bolt, the effect of the impulsive loads applied axially is concentrated on the cross-sectional area at the root of the threads.

A. Yes
B. No

Option A

9. When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus.

A. 5 times
B. 10 times
C. 15 times
D. 20 times

Option C

10. Circumferential joint in boilers is used to get the required length of a boiler.

A. True
B. False

Option A

11. A locking device extensively used in marine type connecting rod ends is a

A. jam nut
B. castle nut
C. sawn nut
D. ring nut

Option D

12. Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

A. elastic strength
B. yield strength
C. shear strength

Option B

13. A transmission shaft includes

A. counter shaft
B. line shaft
C. over head shaft
D. all of these

Option D

14. A steel containing more than 0.8% carbon is known as eutectoid steel.

A. Yes
B. No

Option B

15. The radial distance of a tooth from the pitch circle to the top of the tooth is called

A. dedendum
B. addendum
C. clearance
D. working depth

Option B

16. The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

A. working depth
B. clearance
C. face width
D. backlash

Option D

17. The load cup of a screw jack is made separate from the head of the spindle to

A. enhance the load carrying capacity of the jack
B. reduce the effort needed for lifting the working load
C. prevent the rotation of load being lifted
D. reduce the value of frictional torque

Option C

18. A screw is said to be over hauling screw, if its efficiency is

A. less than 50%
B. more than 50%
C. equal to 50%
D. none of these

Option B

19. When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

A. square threads
B. acme threads
C. knuckle threads
D. buttress threads

Option D

20. A sliding bearing which operates without any lubricant present, is called

A. zero film bearing
B. boundary lubricated bearing
C. hydrodynamic lubricated bearing
D. hydrostatic lubricated bearing

Option A

21. The backlash for spur gears depends upon

A. module
B. pitch line velocity
C. tooth profile
D. both (a) and (b)

Option D

22. In second type of levers,

A. load is in between the fulcrum and effort
B. effort is in between the fulcrum and load
C. fulcrum is in between the load and effort
D. none of these

Option A

23. The square threads are not so strong as V-threads but they offer less frictional resistance to motion than Whitworth threads.

A. Correct
B. Incorrect

Option A

24. In a gear, having involute teeth, the normal to the involute is a tangent to the

A. pitch circle
B. base circle
C. addendum circle
D. dedendum circle

Option B

25. Screws jacks have multiple threads.

A. Agree
B. Disagree

Option B

26. When two non-intersecting and non-coplaner shafts are connected by gears, the arrangement is known as

A. spur gearing
B. helical gearing
C. bevel gearing
D. spiral gearing

Option D

27. The size of a gear is usually specified by

A. pressure angle
B. pitch circle diameter
C. circular pitch
D. diametral pitch

Option B

28. An open belt drive is used when

A. shafts are arranged parallel and rotate in the opposite directions
B. shafts are arranged parallel and rotate in the same directions
C. shafts are arranged at right angles and rotate in one definite direction
D. driven shaft is to be started or stopped whenever desired without interferring with the driving shaft

Option B

29. The number of slots in a 25 mm castle nut is

A. 2
B. 4
C. 6
D. 8

Option C

30. For unequal width of butt straps, the thickness of butt straps are

A. 0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
B. 0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
C. 0.75 t for both the straps on the inside and outside
D. 0.625 t for both the straps on the inside and outside

Option A

31. Which of the following material has the maximum ductility?

A. Mild steel
B. Copper
C. Zinc
D. Aluminium

Option A

32. The rolling contact bearings are known as

A. thick lubricated bearings
B. plastic bearings
C. thin lubricated bearings
D. antifriction bearings

Option D

33. Which of the following statement is correct?

A. The toughness of a material increases when it is heated.
B. The shear stress in a beam varies from zero at the neutral surface and maximum at the outer fibres.
C. The stress concentration in static loading is more serious in brittle materials and less serious in ductile materials.
D. The stress concentration in static loading is more serious in ductile materials and less serious in brittle materials.

Option C

34. When a load W is suddenly applied to a bar of weight W1, the stress induced in the bar will increase with the increase in weight W1.

A. Correct
B. Incorrect

Option B

35. The taper on cotter varies from

A. 1 in l5 to 1 in 10
B. 1 in 24 to 1 in 20
C. 1 in 32 to 1 in 24
D. 1 in 48 to 1 in 24

Option D

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