MES SAE(E/M) Pattern Exam 0.1

MES SAE(E/M): A military organization and one of the largest construction and maintenance agencies in Bangladesh. MES was provides engineering support to the Bangladesh Army, Air Force, Navy, and other organizations. MES is responsible for construction and maintenance of a variety of projects, including roads, runways, hospitals, and marine structures. MES has both military and civilian components.

Q1. Determine torque transmitted on the pinion shaft if torque transmitted on gear shaft is 20 N.m. Consider Gear ratio = 4

A. 8 N-m

B. 5 N-m

C. 80 N-m

D. 16 N-m

Right Answer : B

Q2. The angle at which the teeth of the gear are inclined to the axis of a gear is called as-

A. Pitch angle

B. Normal angle

C. Helix angle

D. Gear angle

Right Answer : C

Q3. The unit of the radial motion -

A. m/min

B. cm/sec

C. rad/sec

D. mm/sec

Right Answer : C

Q4. Moment of inertia is the-

A. second moment of force

B. second moment of area

C. second moment of mass

D. all of these

Right Answer : D

Q5. A solid cone has a height 'h', height of the CG of the cone above the base is-

A. h/4

B. 2h/4

C. 3h/4

D. 4h/3

Right Answer : A

Q6. Which of the following is a vector quantity?

A. Energy

B. mass

C. momentum

D. angle

Right Answer : C

Q7. The center of percussion of the homogeneous rod of length L. suspended at the top will be-

A. L/2

B. L/3

C. 3L/4

D. 2L/3

Right Answer : D

Q8. The maximum frictional force which comes into play when a body just begins to slide over another surface is called-

A. limiting friction

B. sliding friction

C. rolling friction

D. kinematic friction

Right Answer : A

Q9. The angle between two forces when the resultant is maximum and minimum respectively are-

A. 0° and 180°

B. 180° and 0°

C. 90°

D. 90° and 0°

Right Answer : A

Q10. The rate of charge of displacement of a body is called -

A. Velocity

B. acceleration

C. momentum

D. none

Right Answer : A

Q11. Dynamic friction as compared to static friction is-

A. same

B. more

C. less

D. maybe less of more depending on nature of surfaces and velocity

Right Answer : C

Q12. When trying to turn a key into a lock, following is applied-

A. coplanar force

B. non-coplanar forces

C. lever

D. couple

Right Answer : D

Q13. Tangent of angle of friction is equal to-

A. kinetic friction

B. limiting friction

C. angle of repose

D. coefficient of friction

Right Answer : D

Q14. Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity-

A. v

B. v/2

C. v/4

D. v/8

Right Answer : B

Q15. What is the flame temperature of acetylene?

A. 1700°C

B. 2200°C

C. 2800°C

D. 3200°C

Right Answer : D

Q16. How are the metals to be welded connected to each other in spot welding?

A. Electric contact

B. Magnetic field

C. Mechanical pressure

D. Direct contact

Right Answer : C

Q17. What is the maximum power supply needed for the working of spot welding process?

A. 135kVA

B. 140kVA

C. 145KVA

D. 150KVA

Right Answer : D

Q18. Which kind of resistance is experienced in upset butt welding?

A. Electric resistance

B. Magnetic resistance

C. Thermal resistance

D. Air resistance

Right Answer : A

Q19. What is the flame temperature of hydrogen?

A. 2000°C

B. 1200°C

C. 2700°C

D. 3300°C

Right Answer : C

Q20. Which of the following is not a type of resistance welding?

A. Seam

B. Projection

C. Electro-slag

D. Spot

Right Answer : C

Q21. Up to what thickness, can steel be welded using spot welding process?

A. 10 mm

B. 11 mm

C. 12 mm

D. 13 mm

Right Answer : C

Q22. What is the flame temperature of methane?

A. 2000°C

B. 1200°C

C. 2700°C

D. 3300°C

Right Answer : A

Q23. What is the minimum power supply needed for the working of spot welding process?

A. 10kVA

B. 14 kVA

C. 6kVA

D. 22kVA

Right Answer : A

Q24. Oxy-acetylene process is most suited for which of the following process of joining?

A. Metal wires

B. Metal sheets

C. Metal tubes

D. Metal bars

Right Answer : B

Q25. Which of the following types of fuel gas is commonly used in gas welding?

A. Biogas

B. Coal gas

C. Acetylene

D. Methane

Right Answer : C

Q26. What is the efficiency of an AC welding transformer?

A. 0.6

B. 0.7

C. 0.8

D. 0.9

Right Answer : C

Q27. Which material is not used for making non- consumable electrodes?

A. Carbon

B. Graphite

C. Sodium

D. Tungsten

Right Answer : C

Q28. A neutral flame is obtained by supplying-

A. equal volumes of oxygen and acetylene

B. more volume of oxygen and less volume of acetylene

C. more volume of acetylene and less volume of oxygen

D. none of the above

Right Answer : A

Q29. The basic unit of electric charge is-

A. Ampere-hour

B. Joule

C. Coulomb

D. Newton

Right Answer : C

Q30. One Newton meter is same as-

A. one watt

B. five joules

C. one joule

D. one joule second

Right Answer : C

Q31. The unit of absolute permittivity of a medium is-

A. joule/coulomb

B. Newton meter

C. farad/meter

D. farad/coulomb

Right Answer : C

Q32. Which is the lightest particle of an atom?

A. Neutron

B. Proton

C. Electron

D. All have same weight

Right Answer : C

Q33. A length of wire has a resistance of 6 ohms. The resistance of a wire of the same material three times as long and twice the cross sectional will be-

A. 36 ohms

B. 9 ohms

C. 1 ohms

D. 12 ohms

Right Answer : B

Q34. Out of the following which is not a poor conductor?

A. Cast iron

B. Carbon

C. Copper

D. Tungsten

Right Answer : C

Q35. The electric current is due to the flow of-

A. positive charges only

B. negative charges only

C. both positive and negative charges

D. neutral particles only

Right Answer : C

Q36. When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will-

A. decrease

B. remain constant

C. increase

D. none of the above

Right Answer : C

Q37. An SCR behaves as a ---- switch.

A. Unidirectional

B. Mechanical

C. Bidirectional

D. None

Right Answer : A

Q38. An SCR is made of-

A. Germanium

B. Carbon

C. Silicon

D. None of the above

Right Answer : C

Q39. PCB means -

A. Pakistan Cricket Board

B. Printed Circuit Board

C. Painted Crossed Board

D. None

Right Answer : B

Q40. AC power in a load can be controlled by connecting-

A. Two SCRs in series

B. Two SCRs in parallel

C. Two SCRs in parallel opposition

D. None of the above

Right Answer : C

Q41. Noise factor of a ideal amplifier is-

A. 0dB

B. 5dB

C. 0.5dB

D. 10dB

Right Answer : A

Q42. If the temperature of the diode increases, then leakage current-

A. Remains same

B. Increases

C. Decreases

D. Becomes zero

Right Answer : B

Q43. The output frequency of a full wave rectifier is-

A. Same as the input frequency

B. One-half of the input frequency

C. Double of the input frequency

D. Independent of the input frequency

Right Answer : C

Q44. Which causes the barrier layer in a PN Junction-

A. doping

B. barrier potential

C. recombination

D. ions

Right Answer : A

Q45. 1 db corresponds to --- changes in voltage level.

A. 12%

B. 20%

C. 80%

D. 26%

Right Answer : D

Q46. As the temperature of a transistor goes up the base-emitter resistance-

A. decreases

B. increases

C. remains the same

D. none

Right Answer : A

Q47. RC coupling is used for --- amplification.

A. voltage

B. power

C. current

D. none

Right Answer : A

Q48. What is the full name of LCD?

A. Light control diode.

B. Light crystal display.

C. Liquid crystal diode.

D. Liquid crystal display.

Right Answer : D

Q49. Which one is the smallest region in a transistor?

A. base

B. collector

C. emitter

D. both (a) and (b)

Right Answer : A

Q50. Emitter follower is used for-

A. Impedance matching

B. Current gain

C. Voltage gain

D. None of the above

Right Answer : A