MES SAE(E/M) Pattern Exam 0.7

MES SAE(E/M) Pattern Exam 0.7

Q1. Ferromagnetic alpha iron exists in temperature range of-

A. below 723°C

B. 770-910°C

C. 910-1440°C

D. 1400-1539°C

Right Answer : A

Q2. Pure iron is the structure of-

A. ferrite

B. austenite

C. ferrite and cementite

D. pearlite

Right Answer : A

Q3. The metallic structure of mild steel is-

A. body centered cubic

B. face centered cubic

C. hexagonal close packed

D. cubic structure

Right Answer : A

Q4. Paramagnetic alpha iron changes to gamma iron at-

A. 770°C

B. 910°C

C. 1440°C

D. 1539°C

Right Answer : B

Q5. A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as-

A. allotropic change

B. heat treatment

C. recrystallisation

D. precipitation

Right Answer : A

Q6. The material mixed before ore is subjected for smelting in the extraction of iron are-

A. Coke and Silica

B. Coke and limestone

C. Limestone and silica

D. Coke, limestone and silica

Right Answer : B

Q7. The percentage of carbon in cast iron varies from-

A. 0.1 to 0.5

B. 1 to 1.7

C. 5 to 1

D. 1.7 to 4.5

Right Answer : D

Q8. Iron is-

A. paramagnetic

B. fermelectric

C. ferromagnetic

D. dielectric

Right Answer : C

Q9. The following element can't impart high strength at elevated temperature—

A. manganese

B. nickel

C. magnesium

D. silicon

Right Answer : C

Q10. The toughness of a material ---- when it is heated.

A. increases

B. remain same

C. decrease

D. none

Right Answer : C

Q11. In which forging is possible without any problem?

A. alloy steel

B. low carbon

C. high carbon

D. cast

Right Answer : C

Q12. Copper when alloyed with zinc is known as-

A. Brass

B. Babbits

C. Bronze

D. All of the above

Right Answer : A

Q13. Which of the following material has maximum ductility?

A. Mild steel

B. Nickel

C. Copper

D. Aluminum

Right Answer : A

Q14. Railway rails are normally made of –

A. mild steel

B. alloy steel

C. high carbon

D. tungsten steel

Right Answer : C

Q15. Lead is poured into the joint between two pipes. These pipes may be made of-

A. cast iron

B. asbestos cement

C. vitrified clay

D. concrete

Right Answer : A

Q16. Freon group of refrigerants are-.

A. inflammable

B. toxic

C. non-inflammable and toxic

D. non-toxic and non-inflammable

Right Answer : D

Q17. The moisture in None of these refrigerant is removed by-

A. evaporator

B. denumidifier

C. driers

D. safety relief valve

Right Answer : C

Q18. The COP of a domestic refrigerator in comparison to domestic air conditioner will be -

A. same

B. less

C. more

D. unpredictable

Right Answer : B

Q19. In vapor compression cycle, the condition of refrigerant is saturated liquid-

A. after passing through the condenser

B. after passing through the condenser

C. after passing through the expansion throttle valve

D. before entering the expansion valve

Right Answer : A

Q20. Ammonia is-.

A. non-toxic

B. non-inflammable

C. toxic and non-inflammable

D. highly toxic and inflammable

Right Answer : D

Q21. Thermal conductivity of air with rise in temperature-

A. increases

B. decreases

C. remains constant

D. both increases and decreases

Right Answer : A

Q22. The COP of a vapor compression plant in comparison to vapor absorption plant is-

A. more

B. same

C. less

D. unpredictable

Right Answer : A

Q23. An important characteristic of absorption system of refrigeration is-

A. noisy operation

B. quiet operation

C. cooling below 0°C

D. very little power consumption

Right Answer : B

Q24. The vapor compression refrigerator employs the following cycle-

A. Rankine

B. Carnot

C. Reversed Carnot

D. Reversed Rankine

Right Answer : C

Q25. Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of-

A. 1:1

B. 9:1

C. 1:9

D. 1:3

Right Answer : C

Q26. Where does the lowest temperature occur in a vapor compression cycle?

A. condenser

B. compressor

C. evaporator

D. expansion valve

Right Answer : C

Q27. The vapor pressure of refrigerant should be—

A. higher than atmospheric pressure

B. equal to atmospheric pressure

C. lower than atmospheric pressure

D. could be anything

Right Answer : A

Q28. In a refrigeration cycle, the flow of refrigerant is controlled by –

A. compressor

B. evaporator

C. expansion valve

D. condenser

Right Answer : C

Q29. Accumulators should have adequate volume to store refrigerant charge at least-

A. 10%

B. 50%

C. 25%

D. 75%

Right Answer : B

Q30. What is IPP in power sector?

A. Intellectual Property Protection

B. Individual Program Plan

C. Innovative Partnerships Program

D. Independent Power Producer

Right Answer : D

Q31. The diversity factor is always-

A. equal to 1

B. greater than I

C. less than 1

D. none

Right Answer : B

Q32. Reactors are connected with the system-

A. in series

B. in parallel

C. in series-parallel

D. none of the above

Right Answer : C

Q33. The transfer of heat by molecular collision is known as-

A. conduction

B. radiation

C. convection

D. none of these

Right Answer : C

Q34. LDC means-

A. Load delivery center

B. Load distribution center

C. Load dispatch center

D. Load development center

Right Answer : C

Q35. Power plant is expected to have the longest life-

A. steam

B. hydroelectric

C. diesel

D. gas turbine

Right Answer : B

Q36. What is the highest installed capacity of Bangladesh by the type of Fuel?

A. Hydro

B. Natural Gas

C. Coal

D. Furnace Oil

Right Answer : B

Q37. Which of the following components in storm plant needs maximum maintenance attention?

A. steam turbine

B. condenser

C. water treatment plant

D. boiler

Right Answer : B

Q38. Load factor of a power station is defined as-

A. average load/maximum load

B. maximum load/average load

C. average load/connected load

D. more of the above

Right Answer : A

Q39. Computer hardware consists of-

A. Computer table

B. Monitor and CPU

C. Software

D. Google

Right Answer : B

Q40. The main two components of CPU are ____________.

A. control unit and ALU

B. ALU and BUS

C. Control unit and register

D. Registers and main memory

Right Answer : A

Q41. Which of the following is the binary equivalent of 25?

A. 11010

B. 11001

C. 10111

D. 10101

Right Answer : B

Q42. Which of the following hardware was used by the first generation computers?

A. Transistors

B. Vacuum tubes

C. VLSI

D. Integrated circuits

Right Answer : B

Q43. Which of the following is not a benefit of information technology?

A. Retrieval of information

B. Preservation of information

C. Detecting information

D. Knowledge explosion

Right Answer : C

Q44. What is the correct syntax to write an HTML comment?

A. < ! / and / / >

B. < ! - and - >

C. < ! # and # # >

D. < ! % and % % >

Right Answer : B

Q45. Which of the following operation is performed automatically when the computer turns on?

A. Processing

B. Booting

C. Saving

D. Editing

Right Answer : B

Q46. Temperature coefficient of resistance in a pure semiconductor is __________.

A. zero

B. positive

C. negative

D. dependent on size of specimen

Right Answer : C

Q47. Which among the following logic gates are known as universal gates?

A. XOR, NAND, OR

B. OR, NOT, XOR

C. NOR, NAND, XNOR

D. NOR, NAND

Right Answer : D

Q48. The minimum number of 2-input NAND gates required to implement a 2-input XOR gate is-

A. 4

B. 5

C. 6

D. 7

Right Answer : A

Q49. How many AND and OR gates are required to realize Y = AB + BC + CD?

A. 2, 3

B. 2, 1

C. 3, 1

D. 2, 2

Right Answer : C

Q50. The base of Hexa-decimal number is-

A. 2

B. 8

C. 16

D. 32

Right Answer : C