Mechanical Engineering Gate Yearwise 


Mechanical Engineering Gate 2016 Set-3 Questions with Answer

Ques 27 GATE 2016 SET-3

Grashof number signifies the ratio of

A

inertia force to viscous force

B

buoyancy force to viscous force

C

buoyancy force to inertia force

D

inertia force to surface tension force


(b) is the correct answer.

Ques 28 GATE 2016 SET-3

For a heat exchanger, ΔTmax is the maximum temperature difference and ΔTmin is the minimum temperature difference between the two fluids. LMTD is the log mean temperature difference. Cmin and Cmax are the minimum and the maximum heat capacity rates. The maximum possible heat transfer (Qmax) between the two fluids is

A

Cmin LMTD

B

Cmin ΔTmax

C

Cmax ΔTmax

D

Cmax ΔTmin


(b) is the correct answer.

Ques 29 GATE 2016 SET-3

In PERT chart, the activity time distribution is

A

Normal

B

Binomial

C

Poisson

D

Beta


(d) is the correct answer.

Ques 30 GATE 2016 SET-3

Which of the bearings given below SHOULD NOT be subjected to a thrust load?

A

Deep groove ball bearing

B

Angular contact ball bearing

C

Cylindrical (straight) roller bearing

D

Single row tapered roller bearing


(c) is the correct answer.

Ques 31 GATE 2016 SET-3

Equal amounts of a liquid metal at the same temperature are poured into three moulds made of steel, copper and aluminum. The shape of the cavity is a cylinder with 15 mm diameter. The size of the moulds are such that the outside temperature of the moulds do not increase appreciably beyond the atmospheric temperature during solidification. The sequence of solidification in the mould from the fastest to slowest is
(Thermal conductivities of steel, copper and aluminum are 60.5, 401 and 237 W/m-K, respectively. Specific heats of steel, copper and aluminum are 434, 385 and 903 J/kg-K, respectively. Densities of steel, copper and aluminum are 7854, 8933 and 2700 kg/m3, respectively.)

A

Copper - Steel - Aluminum

B

Aluminum - Steel - Copper

C

Copper - Aluminum - Steel

D

Steel - Copper - Aluminum


(c) is the correct answer.

Ques 32 GATE 2016 SET-3

In a wire-cut EDM process the necessary conditions that have to be met for making a successful cut are that

A

wire and sample are electrically non-conducting

B

wire and sample are electrically conducting

C

wire is electrically conducting and sample is electrically non-conducting

D

sample is electrically conducting and wire is electrically non-conducting


(b) is the correct answer.

Ques 33 GATE 2016 SET-3

Internal gears are manufactured by

A

hobbing

B

shaping with pinion cutter

C

shaping with rack cutter

D

milling


(b) is the correct answer.

Ques 34 GATE 2016 SET-3

Match the following part programming codes with their respective functions

Part Programming CodesFunctions
P. G01I. Spindle stop
Q. G03II. Spindle rotation, clockwise
R. M03III. Circular interpolation, anticlockwise
S. M05IV. Linear interpolation

A

P-II, Q-I, R-IV, S-III

B

P-IV, Q-II, R-III, S-I

C

P-IV, Q-III, R-II, S-I

D

P-III, Q-IV, R-I, S-II


(c) is the correct answer.

Ques 35 GATE 2016 SET-3

Engineering strain of a mild steel sample is recorded as 0.100%. The true strain is

A

0.010%

B

0.055%

C

0.099%

D

0.101%


(c) is the correct answer.

Ques 36 GATE 2016 SET-3

The cross-sections of two solid bars made of the same material are shown in the figure. The square cross-section has flexural (bending) rigidity I1, while the circular cross-section has flexural rigidity I2. Both sections have the same cross-sectional area. The ratio I1/I2 is

A

1/π

B

2/π

C

π/3

D

π/6


(c) is the correct answer.

Ques 37 GATE 2016 SET-3

The state of stress at a point on an element is shown in figure (a). The same state of stress is shown in another coordinate system in figure (b). The components (τxx, τyy, τxy) are given by

A

(p/√2, -p/√2, 0)

B

(0, 0, p)

C

(p, -p, p/√2)

D

(0, 0, p/√2)


(b) is the correct answer.

Ques 38 GATE 2016 SET-3

A rigid link PQ is undergoing plane motion as shown in the figure (VP and VQ are non-zero). VQP is the relative velocity of point Q with respect to point P. Which one of the following is TRUE?

A

VQP has components along and perpendicular to PQ

B

VQP has only one component directed from P to Q

C

VQP has only one component directed from Q to P

D

VQP has only one component perpendicular to PQ


(d) is the correct answer.

Ques 39 GATE 2016 SET-3

The number of degrees of freedom in a planar mechanism having n links and j simple hinge joints is

A

3(n-3) - 2j

B

3(n-1) - 2j

C

3n - 2j

D

2j - 3n + 4


(b) is the correct answer.

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