Explore topic-wise MCQs in Graduate Aptitude Test (GATE).

This section includes 98 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.

51.

Maximum Principal Stress Theory is not good for brittle materials.
A. True
B. False
Answer» C.
Discussion
52.

If compressive yield stress and tensile yield stress are equivalent, then region of safety from maximum principal stress theory is of which shape?
A. Rectangle
B. Square
C. Circle
D. Ellipse
Answer» C. Circle
Discussion
53.

 If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 10N/mm². Find the inclination of the plane in which shear stress is maximal.
A. 45’
B. 30’
C. 60’
D. 15’
Answer» B. 30’
Discussion
54.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm²Find the maximum amount of shear stress to which the body is subjected.
A. 22.4mm
B. 25mm
C. 26.3mm
D. 27.2mm
Answer» B. 25mm
Discussion
55.

If joint is to fail by crushing of socket collar then estimate the diameter of socket collar. Given Permissible compressive stress= 126.67 N/mm².; Spigot dia=65mm; thickness 0f collar=15mm
A. 131mm
B. 139mm
C. 141mm
D. 149mm
Answer» B. 139mm
Discussion
56.

Determine the width of the cotter used in cotter joint connecting two rods subjected to axial load of 50kN and permissible shear stress in cotter is 50N/(mm² ). Given thickness of cotter=10mm
A. 5omm
B. 100mm
C. 150mm
D. 25mm
Answer» B. 100mm
Discussion
57.

Which of the following is not a part of cotter joint?
A. Socket
B. Spigot
C. Cotter
D. Collar
Answer» E.
Discussion
58.

Can the cotter joint be used to connect slide spindle and fork of valve mechanism?
 
A. True
B. False
Answer» B. False
Discussion
59.

Cotter joint is used when the members are subjected to which type of stresses?
A. Axial tensile
B. Axial compressive
C. Axial tensile or compressive
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
60.

Hot rolled components have better surface finish than cold rolled components
A. True
B. False
Answer» C.
Discussion
61.

Hot working or cold working, which reduces strain hardening and residual stresses.
A. Hot working
B. Cold working
C. Both have equal effect
D. Impossible to detect
Answer» B. Cold working
Discussion
62.

The temperature at which new stress free grains are formed in the metal is called the ______ temperature.
A. Recrystallization
B. Crystallization
C. Solidification
D. None of the mentioned
Answer» B. Crystallization
Discussion
63.

Tolerance for a shaft of 50mm diameter as the basic size, with the fundamental deviation denoted by g and tolerance of grade 7 is represented as?
A. g50,7
B. 50g7
C. 7g50
D. None of the mentioned
Answer» C. 7g50
Discussion
64.

How many grades of tolerances are there according to BIS system fits and tolerances?
A. 12
B. 14
C. 16
D. 18
Answer» E.
Discussion
65.

 Which of the following are true for fundamental deviation?
A. Gives location of tolerance zone
B. Capital letter is used for both holes and shafts
C. Small letter is used for both holes and shaft
D. None of the mentioned
Answer» B. Capital letter is used for both holes and shafts
Discussion
66.

The description of tolerances consists of two parts namely?
A. Fundamental deviation and magnitude of tolerance
B. Magnitude of deviation and magnitude of tolerance
C. Mean deviation and magnitude of tolerance
D. Fundamental deviation and tolerance
Answer» B. Magnitude of deviation and magnitude of tolerance
Discussion
67.

Which of the following are true for system of tolerances to the shaft and the hole?
A. In hole-basis system, various shafts are associated with a single hole
B. In hole-basis system as well as shaft-basis system, various shafts are associated with multiple holes
C. In shaft-basis system, various shafts are associated with a single hole
D. None of the mentioned
Answer» B. In hole-basis system as well as shaft-basis system, various shafts are associated with multiple holes
Discussion
68.

In this case, tolerance zone of hole is entirely below that of the shaft.
A. Clearance
B. Interference
C. Enjoining
D. Non of the mentioned
Answer» C. Enjoining
Discussion
69.

Which of the following always provides a positive clearance between the hole and the shaft over the entire range of tolerances?
A. Clearance
B. Transition
C. Interference
D. None of the mentioned
Answer» B. Transition
Discussion
70.

Maximum carbon content in welding is usually limited to
A. 0.22%
B. 0.8%
C. 1.5%
D. 2%
Answer» B. 0.8%
Discussion
71.

Among casting, forging and forging which has the slowest rate of production?
A. Casting
B. Forging
C. Machining
D. All have equal rate of production
Answer» D. All have equal rate of production
Discussion
72.

In forging, metal is in which of the following stage?
A. Elastic
B. Plastic
C. Can be in any stage
D. Rigid
Answer» C. Can be in any stage
Discussion
73.

Which process allows controlling grain structure of the product?
A. Casting
B. Forging
C. None of the mentioned
D. Die Casting
Answer» C. None of the mentioned
Discussion
74.

 Shot blasting process improves the endurance limit of the component.
A. True
B. False
Answer» B. False
Discussion
75.

In alloy 4450, 4 represents?
A. Silicon
B. Aluminium
C. Manganese
D. Zinc
Answer» B. Aluminium
Discussion
76.

 In alloy 4450, 2nd digit represents?
A. average percentage of major alloying elements, halved and rounded off
B. average percentage of major alloying elements
C. average percentage of minor alloying elements, halved and doubled
D. average percentage of minor alloying elements
Answer» B. average percentage of major alloying elements
Discussion
77.

 Is it possible to completely relieve the residual stresses in a cast steel product?
A. True
B. False
Answer» C.
Discussion
78.

Which of the following are true for aluminium
A. Low specific gravity
B. Corrosion resistance
C. High thermal conductivity
D. All of the mentioned
Answer» E.
Discussion
79.

Which of the following statement is true
A. Cast aluminium alloys are specified by a four digit system while wrought alloys by a five digit system
B. Cast aluminium alloys are specified by a five digit system while wrought alloys by a four digit system
C. Cast aluminium alloys are specified by a six digit system while wrought alloys by a five digit system
D. Cast aluminium alloys are specified by a five digit system while wrought alloys by a six digit system
Answer» B. Cast aluminium alloys are specified by a five digit system while wrought alloys by a four digit system
Discussion
80.

 Relative density of aluminium is roughly _______ of steel
A. one-third
B. one-fifth
C. one-tenth
D. equal
Answer» B. one-fifth
Discussion
81.

Paraffin wax is represented by
A. C18H35
B. C18H40
C. C18H36
D. None of the mentioned
Answer» E.
Discussion
82.

A thermoplastic material has a linear polymer chain while a thermosetting plastic has a crosslinked polymer chain.
A. True
B. False
Answer» B. False
Discussion
83.

Which of the following is a thermosetting polymer?
A. PVC
B. PTFE
C. Nylon
D. Polyesters
Answer» E.
Discussion
84.

 Viscoelastic materials at low temperatures show no change in its strain with change in stress
A. True
B. False
Answer» C.
Discussion
85.

Hardness is
A. Surface property
B. Resistance to abrasion
C. Depends upon resistance to plastic deformation of the material
D. All of the mentioned
Answer» E.
Discussion
86.

Malleability increases with temperature while ductility decreases with temperature.
A. True
B. False
Answer» B. False
Discussion
87.

 Which of the following are true for toughness
A. Ability of material to absorb energy before fracture
B. Measured by Izod & Charpy test
C. Decreases with the increase in temperature
D. All of the mentioned
Answer» E.
Discussion
88.

Modulus of resilience is defined as
A. Strain energy per unit volume
B. Strain energy per unit area
C. Independent of strain energy
D. None of the mentioned
Answer» B. Strain energy per unit area
Discussion
89.

 Which of the following facts are true for resilience?
A. Ability of material to absorb energy when deformed elastically
B. Ability to retain deformation under the application of load or after removal of load
C. Ability of material to absorb energy when deformed plastically
D. None of the mentioned
Answer» B. Ability to retain deformation under the application of load or after removal of load
Discussion
90.

Which of the following is measure of stiffness?
A. Modulus of elasticity
B. Modulus of plasticity
C. Resilience
D. Toughness
Answer» B. Modulus of plasticity
Discussion
91.

 Which of the following are true about plasticity?
A. Permanent Deformation
B. Ability to retain deformation under load or after removal of load
C. Plastic deformation is greater than elastic deformation
D. All of the mentioned
Answer» E.
Discussion
92.

All engineering materials are plastic.
A. True
B. False
Answer» B. False
Discussion
93.

Proof strength is defined as the stress which will produce a permanent extension of how much percentage in the gauge length of the standard test specimen.
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Answer» B. 0.2
Discussion
94.

For the materials which do not exhibit a well-defined yield points, the yield strength is defined as the stress corresponding to a permanent set of how much percentage of gauge length?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Answer» C. 0.3
Discussion
95.

Yield strength is defined as the maximum stress at which a marked increase in elongation occurs without increase in________
A. Load
B. Strength
C. Toughness
D. Hardness
Answer» B. Strength
Discussion
96.

Which of the following is the definition of Compliance?
A. Inverse of Rigidity
B. Inverse of Stiffness
C. Proportional to elastic Limit
D. None of the mentioned
Answer» C. Proportional to elastic Limit
Discussion
97.

Proportional Limit is defined as the stress at which the stress strain curves begins to deviate from the straight line
A. True
B. False
Answer» B. False
Discussion
98.

Which of the following parameters can be obtained by tension test of a standard specimen?
A. Proportional Limit
B. Yield Strength
C. Percentage Reduction in area
D. All of the mentioned
Answer» B. Yield Strength
Discussion