DOM 3.1.1 R10 @SACETME

___________ BITS

1. ____________of the ship is usually considered to take place with sample harmonic motion. :-> pitchit

2. _________missing text from original_____________

A

3. A 4 wheel vehicle having of gravity 0.6m above the ground level and loess at 1m_______________________________outer wheels :->turn right4. A 4 wheel vehicle having of gravity 0.6m above the ground level and lies at 1m_______________________________inner wheels :->lift

5. A band brake arrangement the brake to work with force _____________ Ans :->a-b6. A body of weight 100N is moved on a horizontal _____________:->100 /√27. A body of weight 100N is moved on horizontal plane ________________:->508. A brake commonly used in motor cars is :->internal expanding brake9. A brake commonly used in railway trains is :->shoe brake10. A flat footstep bearing 10 cm radius supports a load of 3Kn. The shaft runs at 600/π r.p.m and co-efficient of friction is 0.1. The friction al torque and

frictional power in watts with uniform WEAR are respectively :->15 N-m and 300 Watts11. A flat footstep bearing 10 cm radius supports a load of 3Kn. The shaft runs at 600/π r.p.m and co-efficient of friction is 0.1. The friction al torque and

frictional power in watts with uniform PRESSURE are respectively :->20 N-m and 400 Watts12. A foot step bearing of 100mm radious___________:->20N-m and 400w13. A jaw clutch is a:->positive clutch14. A motor can negotiates a curve of 40m radius at a speed of 60 km/h ________:->33.33rad/s15. A multiple disc clutch has three discs on the discs on ___________:->416. A pair of action and reaction forces which constrain two ________are know as :->constraint force17. A thin disc is fixed to a shaft in such a way that it ________:->184.45N-m18. A wheel of a vehicle travelling on a level track at certain velocity__________:->left19. A wheel of vehicle with moment of insertia of 500 kgm2 ______________N-m :->2577.8

20. A wheel with a moment of inertia ________:-> 21. Applied couple and reaction couple are __________ :->opposite

B

22. Brakes are correct :->Kinetic energy into potential energy into Heat energy

C

23. clockwise direction when viewed from sterns. when the ship turns right. the gyroscopic couple tends to _ _ __ _ the stern :->raise24. Consider the safe design, the friction clutch should be design :->assuming uniform wear

D

25. Differential band brake if T1/T2=3, the condition for delf locking is shown in figure (a)

Ans:->

F

26. FMR as refered to brakes is :->Force multiplication ratio27. For a disc with moment of inertia of ___________:->Iwwp

28. For a four whell vehicle, with rear wheels at impending slip_________:->

29. For block brakes θ=angles of lap ________:->

30. For block brakes, θ=angle of lap, r is the radious of drum _________:-> 31. For from wheels at impending slip and rear wheels controlled by r and when r=0.35, the RBE :->increases with increases in µ ½

32. For large ranges of power and speed and for accurate measurement of power_____:->Froude water volten dynamometer33. For measuring powers of machines having high speed and comparatively_______:->electric generator dynamometer34. For multiple plate friction clutch _____________________:->na =(n- 1 ) 35. For multiple plate friction clutch with n plates ,the number_____________:->na=n- 1 36. For rear wheels at impending slip and front wheels controlled by r _______:->decreases with increase in µ1

37. For the same pitch, the efficiency of screw jack______________:->more than that with V-threads38. Force at solid friction is independent of _ _ _ _ _:->area of contact : >area of contact

39. Force downward at A and direction clockwise shown in figure (a)

Ans :->a/b < T1 /T2 gives self lock40. Force of solid friction is directly proportional to w _ _ _ _:->normal reaction

41. Force upwards and direction counter clockwise which of the following statements are correct shown in figure (a) i)a/b =T1/T2 gives self lock_________ :->I, ii, iii, are correct

42. Force upwards and direction counter clockwise which of the following statements are correct shown in figure (a) i) System will work only if a is greater than b__________:->I, ii, iii are correct

43. Forces acting from outside on ___________are called :->applied forces44. Friction due to rolling at one surface over another is called _ _ p _ v_ 0 _ :->-rolling friction

45. Friction when the two surfaces iN contact are _________lubricant is called _ _ _ :->skin friction46. Friction when the two surfaces in contact have thin minute thin layer of lubricant between them it is know as _ _ _ _ _ _ _ _ _ :->skin friction

47. From fig it shows band. F the force at lever end acts____________ :->

48. From the fig pivot 01 , force at A acting vertically up, then shown in figure (a) :->brake is more effective in counter clockwise direction

49. From the fig pivot point 02 , force at A acting vertically up, then shown in figure (a) :->brake is equally effective in both the directions

50. From the fig, the condition for self locking is shown in figure (a) :-> 51. Front end of a naval ship is called _____ _ _ :- >chow

G

52. Gyroscopes can be used for ________of ships, aeroplanes etc :->stabilization53. Gyroscopic couple causes gyroscopic __________:->acceleration54. Gyroscopic couple is nothing but rate of _________:->angular momentum

H

55. How do you diffrenciate the turning moment diagram between _________:->turning moment diagram repeat after every two revolutions

I

56. If coefficient of friction =0.1 and angle of indication ___________________:->38.6 % 57. If coefficient of friction is 0.I4. the angle of repose _______:-> 7.97 ° 58. If flat pivot bearing the total moment of friction force :->for uniform wear is less than that for uniform pressure59. If moment of inertia of a rotating body is 45 kgm2 ______________:->7068 N.m60. If moment of inertia of rotating body is 45 kgm2___________:->7068N.m61. If the angle of repose is 30° ,the maximum efficiency _________________:->33.33 % 62. In a 4-stroke I.C engine, the turning moment diagram during the suction is :->negative throughout63. In a 4-stroke I.C engine, the turning moment during the compression stroke is :->negative throughout64. In a 4-stroke I.C engine, the turning moment during the exhaust stroke is :->negative throughout65. In a 4-stroke I.C engine, the turning moment during the expanstion stroke is :->positive during major portion of the stroke66. In a fly wheel the safe stress is 252N/m2 and density is 7gm/cm3 , the maximum peripheral velocity will be shown in figure (a)

Ans :->60m/sec67. In a gyroscope, precession axis and gyroscopic couple axis are _______:->perpendicular68. In a gyroscope, spin axis and gyroscopic couple axis are __________:->perpendicular69. In a gyroscopic, spin axis and precession axis are ________ to each other :->perpendicular70. In a multiple disc clutch, n½ are the number ______________:->n1+n2-171. In a turning diagram, the variations of energy above the mean_________:->fluctuation energy72. In an internal expanding shoe brake , more then ____:->trailing shoe73. In case of pivot bearing the waer is :->zero at the center of contact area74. In flat pivot bearing the total power lost in friction :->for uniform wear is less then that for uniform pressure75. In gyroscopic problems ____________ rule is used :->Right hand screw rule

76. In proney brake dynamometer, the B.P is calculated by Where W = Leed load _____________:-> 77. In Radial brakes, the force acting on the drum is in ____:->Radial direction

78. In Rope brake dynamometer, the B.P is calculated by Where W= Leed load ____________:->

L

79. Limited angle motion of the ship about the longitudinal axis is called _ __ _ _ :->rolling80. Limited angular motion of the ship about the transverse axis is called ______:->pitching

M

81. Maximum efficiency of screw jack :-> increases with increase in co-efficient of friction

N

82. Net reaction of ground on wheels due to gyroscopic couple__________:->decreased on inner wheels and increased on outer wheels

P

83. Pick up wrong statement. A flywheel :->controls the mean speed of variation

84. Pivot point 03 , force at A vertically up and if µa >b shown figure (a) :->The brake is self locking in counter clocking direction

R

85. Rear end of a naval ship is called _________ _ _ :->stern86. Relative breake effectiveness for case when rear wheels are at impending slip and front wheels are controlled by r as compared to when front wheels

are at impending slip and rear wheels controlled by r for µ1= 0.6 and r=0.45 is :->less87. Relative breake effectiveness for case when rear wheels are at impending slip and front wheels are controlled by r as compared to when front wheels

are at impending slip and rear wheels controlled by r for µ1= 0.8 and r=0.45 is :->less88. Relative breake effectiveness for case when rear wheels are at impending slip and front wheels are controlled by r as compared to when front wheels

are at impending slip and rear wheels controlled by r for µ1= 0.6 and r=0.35 is :->more89. Relative breake effectiveness for case when rear wheels are at impending slip and front wheels are controlled by r as compared to when front wheels

are at impending slip and rear wheels controlled by r for µ1= 0.4 and r=0.45 is :->same90. Rope brake dynamometer uses :->no lubricant

T

91. The air screw of an aeroplane is rotating clockwise when looking____________:->tend to raise the nose and depress the tail92. The axis of spin. the axis of precession and axis _______torque are contained in :->two planes perpendicular to each other93. The axes of rolling of the ship and the rotor are _ _ _ _ :->parallel 94. The bearing pressure on flat collar bearing is ____________:->4 X 10 5 N/m 2

95. The best choice for the brake is to have pivot point at shown figure (a) :-> 02

96. The cranks, in case of three cylinder, are usually placed at _________ :->120 ° 97. The efficiency of screw jack :->increases with increase in pitch of the screw jack98. The efficiency of screw jack :->is true for all statements above 99. The equivalent co-efficient of friction for V-threads is :-> greater then the actual co-efficient of friction100. The fluctuation of speed during a cycle is =/ 5 % of mean __________:->remain same if mean speed of prime mover is increased 101. The flywheel of a steem enine has a radions of gysotion of 1m and mass 2500kg. The starting torque of engine is 1500 N-m. Find the k.E

__________:->45 kN-m102. The flywheel of a steem enine has a radions of gysotion of 1m and mass 2500kg. The starting torque of engine is 1500 N-m. what is the angular

_____:->0.6 rad/s 2 103. The flywheel of a steem enine has a radions of gysotion of 2m and mass 3000kg. The starting torque of engine is 1400 N-m.[what is the

___________:->0.11 rad/s 2 104. The following dynamometer is midely used for the absorption of wide range of _______:->Hydraulic105. The following dynamometer is used for power measurement when the speed is high _____:_>Tesla fluid friction dynamometer106. The friction torque, with the assumption of uniform pressure ________:->greater107. The frictional torque produced due to friction for same_____________:->more than that for flat bearing108. The inner and outer radi of a single plate clutch is 100mm_______:->62.5 N-m 109. The left hand of naval ship when viewed from Bow is called_________:->starboard

110. The left hand side of naval ship when viewed from stern is called _ _ _ _ __ _ :->port

111. The maximum efficiency depends on :->angle of friction

112. The maximum fluctual of energyin a flywheel is equal to I = moment of intertia _____________113. the maximum fluctuation of energy is the :->difference between the maximum and minimum energies114. The maximum fluctuation of the energy of fly wheel is ________ to the moment of inertia of flywheel :->directly115. The maximum fluctuation of the energy of fly wheel is ________ to the square of angular velocity of flywheel :->directly116. The maximum fluctuation of the energy of fly wheel is ________ to the coefficient of fluctuation of speed :->directly

117. The maximum value of angle of inclination of plane with the _ __ _ _ _ __ :->limiting angle of friction118. The maximum value of angle of inclination of plane with _ _ _ __ _ __ _ :-> angle of repose119. The most commonly used dynamometer in tests in the laboratory is :->Proney break dynamometer120. The number of collars are provided to carry a fixed axial load in a flat collar bearing :->to decrease intensity of pressure121. The planes of spin. procession and applied gyroscopic torque are In :->three planes perpendicular to one another

122. The ratio of frictional torque produced ____________________:->123. The ratio of maximum fluctuation of speed to the mean speed is called :->coefficient of fluctuation of speed

124. The ratio of tension on the tight side to the slack side for block brakes __________:-> 125. The ratio of the maximum fluction of energy to the _____is called coefficient of fluctuation energy :->work done /cycle126. The right hand side of naval ship when viewed from stern is called __ _ _ _ _ _ :->starboard127. The screw is said to be self locking if_ _ _ _ _ _ _ _ :->efficiency 50%

128. The screw jack will have minimum efficiency __________:->129. The stopping distance for a Vehicle by applying __________:->more130. The temperature rise in the _________:->I, ii, & iii are correct131. The tight hand of naval ship when viewed from Bow is called _ _ _ _ __ _ :->port

132. The total angle of metric V- threads is 60°________________________:->0.11547133. The T-θ diagram of an engine for a cycle. The rim peripheral velocity of flywheel is 53 √π m/sec coefficient of fluctuation of speed is 2%. The

angular mean speed is flywheel is 50π red/sec and moment of inertia of 2 kg m2 the coefficient of fluctuation of speed is shown in figure (a)

Ans :->2 % 134. The T-θ diagram of an engine for a cycle. The rim peripheral velocity of flywheel is 53 √π m/sec coefficient of fluctuation of speed is 2%. The

maximum fluctuation of energy is shown in figure (a)

Ans :->100 π

N-m135. The T-θ diagram of an engine for a cycle. The rim peripheral velocity of flywheel is 53 √π m/sec coefficient of fluctuation of speed is 2%. The

mass of flywheel is shown in figure (a)

Ans :->2kg136. The T-θ diagram of an engine. The mass moment of inertia is 0.1 kg m2. The angular acceleration is shown in figure (a)

Ans 137. The T-θ diagram of an engine. The mean speed of prime mover is 20π rod/sec. The mass moment of inertia is 0.1 kg m2 . The coefficient of

fluctuation of energy is approximately. Shown in figure (a) ________:->138. There is no gyroscopic effect on a naval ship when it is________:->rolling

139. To be on the safe side in design _____________:->for power lost due to friction and power transmitted by friction140. Turning of a naval ship on the side when viewing from the top is called _ _ _ _ _ _ :->steering

141. Turnning moment diagram is drawn between :->torque and crank angle142. T-θ diagram 1200 of an engine for a cycle of aperetion 1000 torque maximum fluctuation of energy y N-m shown figure (a)

:->314 N-m143. T-θ diagram of an engine. The mass moment of inertia of flywheel is 0.1 kg m2 and mean speed of prime mover is 600 rpm the variations of

speed during the cycle is shown in figure (a)

Ans :-> 5 rad/sec

W

144. When a body slides over another. the motion resisted by a force called the ____:->force of friction145. When a vehicle moves on a curved path centrifugal force acts at the center of gravity__________:->outward146. When brakes are applied to the the four wheels of moving car________:->maximum147. When spin axis is along the longitudinal axis the gyroscopic angle will be introduced along with

transverse axis :->when the slip is rolling

148. When spin axis is along the longitudinal axis the gyroscopic couple will be introduced along the Ionitudional axis ________ :->when the ship is pitching

149. When the frictiona force helps the applied force in _________:->self energizing150. When the frictional force is great enough to apply _________:->Self locking brake151. When the plane of spin of the rotor is horizontal and across the breath of the ships. The rotor rotating clockwise direction when viewed from

sten. when the ship turns right. the gyroscopic couple tends to _ _ __ _ the bow :->lower

152. When the plane of spin of the rotor is horizontal and across the breath of the ships. The rotor rotating clockwise direction when viewed from stem, when the ship turns left. the gyroscopic couple tends to _ __ _ __ the bow :-> raise

153. When the plane of spin of the rotor is horizontal and actions the breath of the ships. The rotor rotating clockwise direction when viewed from stem. when the ship turns left. the gyroscopic couple tends to _ _ _ __ the stern :-> lower

154. When two surfaces have it sliding motion relative to each other it is called ____ _ _ :->solid friction I40. 155. Which of the following clutch is used for power presses and punching machines :->Jaw clutch156. Which of the following is classified as Absorption dynameter :->Proney brake dynamometer157. Which of the following is classified as transmission dynameter :->Torsion dynamometer158. Which of the following is statements are correct about dynamoments __________ :->I, II, III are correct159. Which of the following statements are correct of clutches i) it is used to ________:->I & ii are correct160. Which one following statement are correct i)Self locking ______:->I & II are correct161. Which one is the correct statement? :->the flywheel in fluencies the cyclic variation of the prime mover162. Which one of the following statements are correct? I)Brakes are applies ______:->I, ii are correct163. With respect to an inclined plane. the ratio of the ________:-> -efficiency of the inclined plane

@SACETME