MCQOPTIONS
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MCQOPTIONS
This section includes 991 Mcqs, each offering curated multiple-choice questions to sharpen your GATE (Mechanical Engineering) knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
A feather key transmits a turning moment and permits axial movement also. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 52. |
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 |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 53. |
A connecting rod is four times strong in buckling about Y-axis than about X-axis. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 54. |
The material generally used for air-craft components is |
| A. | mild steel |
| B. | high speed steel |
| C. | stainless steel |
| D. | aluminium |
| Answer» E. | |
| 55. |
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 |
| Answer» E. | |
| 56. |
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as hollow saddle key. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 57. |
In a bolt, the plane of shear should be across the threaded portion of the shank. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 58. |
The module in the reciprocal of diametral pitch. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 59. |
A plate with a circular hole in the centre is subjected to a pull of P. The maximum stress induced at the edge of the hole is three times of the nominal stress. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 60. |
The property of a bearing material which has the ability to accomodate small particles of dust, grit etc. without scoring the material of the journal, is called |
| A. | bondability |
| B. | embeddability |
| C. | comformability |
| D. | fatigue strength |
| Answer» C. comformability | |
| 61. |
An universal coupling is a type of __________ coupling. |
| A. | rigid |
| B. | flexible |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 62. |
A basic shaft is one whose |
| A. | lower deviation is zero |
| B. | upper deviation is zero |
| C. | lower and upper deviations are zero |
| D. | none of these |
| Answer» C. lower and upper deviations are zero | |
| 63. |
The size of a cam depends upon |
| A. | base circle |
| B. | pitch circle |
| C. | prime circle |
| D. | pitch curve |
| Answer» B. pitch circle | |
| 64. |
Screws jacks have multiple threads. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 65. |
According to Indian standards, total number of tolerance grades are |
| A. | 8 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 66. |
A shaft is a rotating machine element. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 67. |
The average shear stress in the hollow shaft is smaller than the average shear stress in the solid shaft. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 68. |
According to Indian standards, total number of fundamental deviations are |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| Answer» E. | |
| 69. |
The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 70. |
The diameter of washer is generally taken bigger than the nut size. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 71. |
When the effort is in between the fulcrum and load, the lever is said to be of third type. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 72. |
A turn buckle is used to connect two round rods subjected to tensile loading and requiring subsequent adjustment for tightening or loosening. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 73. |
The product of the diametral pitch and module is equal to one. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 74. |
A quarter turn belt drive is used when the shafts are arranged at right angles and rotate in one definite direction. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 75. |
In worm gears, the pressure angle is half the angle between two inclined faces in axial plane. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 76. |
The included angle for the acme thread is 29°. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 77. |
The interference may only be avoided if the addendum circles of the two mating gears cut the common tangent to the base circles between the points of tangency. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 78. |
A connecting rod subjected to an axial load may buckle in the plane of motion of the connecting rod. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 79. |
The strength of the un-riveted plate (P) per pitch length is equal to |
| A. | p.d.σt |
| B. | p.t.σt |
| C. | (p - d)σt |
| D. | (p - d)tσt |
| Answer» C. (p - d)σt | |
| 80. |
A wood-ruff key is |
| A. | a tapered key with head at one end |
| B. | fitted in pairs at right angles |
| C. | capable of tilting in a recess milled out in the shaft |
| D. | all of the above |
| Answer» D. all of the above | |
| 81. |
When two non-parallel or intersecting but coplaner shafts are connected by gears, the arrangement is known as bevel gearing. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 82. |
The temperature required for full annealing in hyper-eutectoid steel is |
| A. | 50°C above upper critical temperature |
| B. | 50°C below upper critical temperature |
| C. | 50°C above lower critical temperature |
| D. | 50°C below lower critical temperature |
| Answer» D. 50°C below lower critical temperature | |
| 83. |
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 |
| Answer» B. compressive stress | |
| 84. |
When the top of a tooth undercuts the root on the mating gear, it is known as interference. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 85. |
Teflon is used for bearings because of |
| A. | low coefficient of friction |
| B. | better heat dissipation |
| C. | smaller space consideration |
| D. | all of these |
| Answer» B. better heat dissipation | |
| 86. |
A lap joint is always in single shear. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 87. |
When two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft, the arrangement is known as spiral gearing. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 88. |
The taper on cotter and slot is made on both the sides. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 89. |
Which of the following property is desirable in parts subjected to shock and impact loads? |
| A. | Strength |
| B. | Stiffness |
| C. | Brittleness |
| D. | Toughness |
| Answer» E. | |
| 90. |
A tap bolt has |
| A. | threads for the nut at one end and head at the other end |
| B. | head at one end and the other end fits into a tapped hole of one of the parts to be fastened |
| C. | threads at both ends |
| D. | pointed threads |
| Answer» C. threads at both ends | |
| 91. |
A steel containing __________ 0.8% carbon is known as hypo-eutectoid steel. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| D. | None of these |
| Answer» C. greater than | |
| 92. |
In a belt drive, the velocity ratio is the inverse ratio of the diameters of driving and driven pulleys. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 93. |
A bushed pin flexible coupling is used to connect two shafts whose axes intersect at a small angle. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 94. |
Which of the following is an antifriction bearing? |
| A. | journal bearing |
| B. | pedestal bearing |
| C. | collar bearing |
| D. | needle bearing |
| Answer» E. | |
| 95. |
A tangent key is provided in pairs at right angles and each key is to withstand torsion in one direction only. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 96. |
The set screws are used to prevent relative motion between the two parts. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 97. |
If T1 and T2 are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to |
| A. | T1 - T2 + Tc |
| B. | T1 + T2 + Tc |
| C. | (T1 - T2 + Tc)/2 |
| D. | (T1 + T2 + Tc)/2 |
| Answer» E. | |
| 98. |
An universal coupling is used to connect two shafts |
| A. | which are perfectly aligned |
| B. | which are not in exact alignment |
| C. | have lateral misalignment |
| D. | whose axes intersect at a small angle |
| Answer» E. | |
| 99. |
Euler's formula for a mild steel column is not valid if the slenderness ratio is |
| A. | 60 |
| B. | 90 |
| C. | 100 |
| D. | 120 |
| Answer» B. 90 | |
| 100. |
A castle nut is a locking device in which |
| A. | a thinner nut is tightened down over a thicker or main nut and the main nut is tightened against the thinner nut by loosening |
| B. | a slot is cut in line with the centre of each face and a split pin passes through two slots in the nut and a hole in the bolt, so that a positive lock is obtained unless the pin shears |
| C. | a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction |
| D. | the bottom cylindrical portion is recessed to receive the tip of the locking set screw |
| Answer» C. a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction | |