MES SAE(E/M) Pattern Exam 0.5
MES SAE(E/M) Pattern Exam 0.5:
Q1. The Lubricant used in IC engine are-
A. Vegetable oils
B. Animal oils
C. Graphite
D. Mineral oils
Right Answer : D
Q2. 'Otto cycle' is based on which of the following process?
A. Constant temperature
B. Constant volume
C. Constant pressure
D. Both constant pressure and constant temperature
Right Answer : B
Q3. An I.C engine works with a compression ratio of 16. If cut-off happens at 8% of the stroke, then the cut-off ratio of this engine is:
A. 1.2
B. 2.2
C. 4.2
D. 3.2
Right Answer : B
Q4. The mean effective pressure of the diesel cycle having a fixed compression ratio will increase if the cut-off ratio-
A. Increases
B. Decreases
C. Independent of CR
D. Depends upon other factors
Right Answer : A
Q5. The purpose of a thermostat in an engine cooling system is to-
A. Prevent the coolant from boiling
B. Allows the engine to warm up quick
C. Pressurize the system to raise the boiling point
D. Indicate to the driver, the coolant temperature
Right Answer : B
Q6. Which of the following does not relate to spark ignition engine?
A. Spark plug
B. Carburetor
C. Fuel injector
D. Ignition coil
Right Answer : C
Q7. Which is the most effective air cleaner in the case of diesel engines?
A. whirl type
B. oil bath type
C. wet type
D. dry type
Right Answer : B
Q8. Gasoline engines are _____________ than diesel engines.
A. lighter
B. unpredictable
C. heavier
D. none of the mentioned
Right Answer : C
Q9. Formation of ice on the _____________ plate is eliminated in electronic fuel injection.
A. engine
B. throttle
C. nozzle
D. none of the mentioned
Right Answer : B
Q10. The timing of injection has to be advanced as the speed _____________
A. increases
B. stables
C. decreases
D. none of the mentioned
Right Answer : A
Q11. The ignition timing is affected by _____________
A. engine speed
B. mixture strength
C. compression ratio
D. all of the mentioned
Right Answer : D
Q12. In _____________ injection, fuel is injected only during induction stroke over a limited period.
A. continuous
B. timed
C. continuous & timed
D. none of the mentioned
Right Answer : B
Q13. Fuel injection in an SI engine _____________ volumetric efficiency.
A. increases
B. decreases
C. maintains constant
D. none of the mentioned
Right Answer : A
Q14. By using fuel injection in an SI engine, better _____________ efficiency is obtained.
A. thermal
B. mechanical
C. unpredictable
D. none of the mentioned
Right Answer : A
Q15. Which of the following is NOT an advantage of increasing the side-cutting edge angle?
A. Increases tool life
B. Diminishes chip thickness
C. Provides better surface finish
D. Poor surface finish
Right Answer : D
Q16. The angle between face of the tool and a line parallel with the base of the tool, measured in a perpendicular plane through the side cutting edge is-
A. Side relief angle
B. Back rake angle
C. Side rake angle
D. End relief angle
Right Answer : B
Q17. For measurement of _______, a Dynamometer device is used.
A. chip thickness ratio
B. wear of the cutting tool
C. deflection of the cutting tool
D. forces during metal cutting
Right Answer : D
Q18. Continuous chips during machining forms when-
A. speed is high, feed is low
B. speed is high, feed is high
C. speed is low, feed is low
D. speed is low, feed is high
Right Answer : A
Q19. In an orthogonal cutting system the cutting edge is:
A. In line with direction of tool travel
B. Perpendicular to direction of tool-travel
C. Perpendicular to shear plane
D. Perpendicular to direction of depth of cut
Right Answer : B
Q20. The chip thickness ratio 'r' in Orthogonal metal cutting operation is always:
A. Greater than unity
B. Equal to unity
C. Less than unity
D. Equal to depth of cut
Right Answer : C
Q21. Which cutting technology principle is used for drilling of holes in a metallic substrate?
A. Orthogonal cutting
B. Oblique cutting
C. Uniform cutting
D. Straight cutting
Right Answer : B
Q22. Which type of cutting tools have wide application on lathes?
A. single point
B. multi point
C. both single point and multi point
D. none of the mentioned
Right Answer : A
Q23. In how many groups, cutting tools can be divided?
A. 2
B. 3
C. 4
D. 5
Right Answer : A
Q24. In which machining process, removed metal is negligible?
A. surface finishing
B. metal removal
C. both surface finishing and metal removal
D. none of the mentioned
Right Answer : A
Q25. Which of the following is not groped under the surface finishing process?
A. sawing
B. tapping
C. buffing
D. polishing
Right Answer : A
Q26. In which type of metal removal process, grinding is included?
A. conventional machining
B. abrasive process
C. nontraditional machining
D. none of the mentioned
Right Answer : B
Q27. The basic function of a transformer is to change
A. the level of the voltage
B. the power level
C. the power factor
D. the frequency
Right Answer : A
Q28. In an ordinary transformer which of the following does not change-
A. Voltage
B. Current
C. Frequency
D. All of the above
Right Answer : C
Q29. The efficiency of the power transformer is
A. 50%
B. 60%
C. 80%
D. 95%
Right Answer : D
Q30. Transformer action requires a
A. constant magnetic flux
B. increasing magnetic flux
C. alternating magnetic flux
D. alternating electric flux
Right Answer : C
Q31. The iron core in a transformer provides a _______ path to a main flux.
A. low reluctance
B. high reluctance
C. low resistance
D. high conductivity
Right Answer : A
Q32. A transformer transforms
A. voltage
B. current
C. voltage and current
D. frequency
Right Answer : C
Q33. The power factor of a power transformer on no load will be about-
A. unity
B. 0.75
C. 0.5
D. 0.35
Right Answer : D
Q34. The main purpose of performing open circuit on a transformer is to measure its-
A. Copper losses
B. Iron losses
C. Total losses
D. Insulation resistance
Right Answer : B
Q35. Power transformer are designed to have maximum efficiency around -------- full load.
A. Nearly
B. 70%
C. 50%
D. 25%
Right Answer : A
Q36. Transformer oil must be free from-
A. Moisture
B. Sledges
C. Gases
D. Sulphur
Right Answer : A
Q37. The efficiency of two identical transformers under load conditions can be determined by-
A. Back-to-back test
B. Short circuit test
C. Open circuit test
D. Any of the above
Right Answer : A
Q38. Which part of transformer is subjected to maximum heating?
A. Frame
B. Core
C. Winding
D. Oil
Right Answer : C
Q39. For a starting a 3-ph induction motor is about ____ of its full-load rated current.
A. Half
B. Twice
C. 5 to 7 times
D. 15 to 20 times
Right Answer : C
Q40. In a split phase motor the ratio of number of turns on auxiliary winding to that on main winding is-
A. Unity
B. Less than one
C. More than one
D. Two
Right Answer : B
Q41. The emf induced in a conductor rotating in a bipolar field is-
A. DC
B. AC
C. Both
D. None
Right Answer : B
Q42. The principle of dynamically induced emf is utilized in-
A. transformer
B. choke
C. generator
D. thermocouple
Right Answer : C
Q43. Which of the following is not a part of dc machine?
A. armature
B. commutator
C. field winding
D. damping winding
Right Answer : D
Q44. The field coils of a dc generator are usually made of-
A. mica
B. copper
C. cast iron
D. carbon
Right Answer : B
Q45. The ventilating ducts in most of the dc machines are-
A. radial
B. longitudinal
C. radial as well as longitudinal
D. none of these
Right Answer : C
Q46. What are slot wedges in a dc machine made of?
A. mild steel
B. silicon steel
C. fiber
D. cast iron
Right Answer : C
Q47. A 4 pole generator with 16 coils has a two layer lap winding. The pole pitch is-
A. 32
B. 16
C. 8
D. 4
Right Answer : C
Q48. The commutator pitch for simplex wave winding is equal to-
A. +1 or -1
B. twice average pitch
C. average pitch
D. half average pitch
Right Answer : C
Q49. The commutator pitch for simplex lap winding is-
A. +1
B. -1
C. +1 or -1
D. average pitch
Right Answer : C
Q50. In a lap wound dc generator having P poles and Z conductors the maximum number of equalizes rings will be-
A. Z/P
B. 2Z/P
C. Z/2P
D. Z/4P
Right Answer : B
