Mechanical Engineering Gate Yearwise

Mechanical Engineering Gate 2014 Set-1 Questions with Answer

1 2 3 4 5

Ques 27 GATE 2014 Set-1

For the given statements:
I. Mating spur gear teeth is an example of higher pair
II. A revolute joint is an example of lower pair
Indicate the correct answer.

Both I and II are false

I is true and II is false

I is false and II is true

Both I and II are true

(d) is the correct answer.

Ques 28 GATE 2014 Set-1

A rigid link PQ is 2 m long and oriented at 20° to the horizontal as shown in the figure. The magnitude and direction of velocity V_Q and the direction of velocity V_p are given. The magnitude of V_p (in m/s) at this instant is

2.14

1.89

1.21

0.96

(d) is the correct answer.

Ques 29 GATE 2014 Set-1

For machining a rectangular island represented by coordinates P(0,0), Q(100,0), R(100,50) and S(0,50) on a casting using CNC milling machine, an end mill with a diameter of 16 mm is used. The trajectory of the cutter centre to machine the island PQRS is

(-8, -8), (108, -8), (108,58), (-8,58) , (-8, -8)

(8,8), (94,8), (94,44), (8,44), (8,8)

(-8,8), (94,0), (94,44), (8,44), (-8,8)

(0,0), (100,0), (100,50), (50,0), (0,0)

(a) is the correct answer.

Ques 30 GATE 2014 Set-1

The major difficulty during welding of aluminium is due to its

high tendency of oxidation

high thermal conductivity

low melting point

low density

(a) is the correct answer.

Ques 31 GATE 2014 Set-1

The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is 400 N. The turning was performed using 2 mm depth of cut and 0.1 mm/rev feed rate. The specific cutting pressure (in N/mm²) is

1000

2000

3000

4000

(b) is the correct answer.

Ques 32 GATE 2014 Set-1

In solid-state welding, the contamination layers between the surfaces to be welded are removed by

alcohol

plastic deformation

water jet

sand blasting

(b) is the correct answer.

Ques 33 GATE 2014 Set-1

During pure orthogonal turning operation of a hollow cylindrical pipe, it is found that the thickness of the chip produced is 0.5 mm. The feed given to the zero degree rake angle tool is 0.2 mm/rev. The shear strain produced during the operation is _______

(2.8 to 3.0) is the correct answer.

Ques 34 GATE 2014 Set-1

If the Taylor’s tool life exponent n is 0.2, and the tool changing time is 1.5 min, then the tool life (in min) for maximum production rate is _______

(5.9 to 6.1) is the correct answer.

Ques 35 GATE 2014 Set-1

An aluminium alloy (density 2600 kg/m³) casting is to be produced. A cylindrical hole of 100 mm diameter and 100 mm length is made in the casting using sand core (density 1600 kg/m³). The net buoyancy force (in newton) acting on the core is _______

(7 to 8) is the correct answer.

Ques 36 GATE 2014 Set-1

The process of reheating the martensitic steel to reduce its brittleness without any significant loss in its hardness is

normalising

annealing

quenching

tempering

(d) is the correct answer.

Ques 37 GATE 2014 Set-1

A metal rod of initial length L₀ is subjected to a drawing process. The length of the rod at any instant is given by the expression, L(t) = L₀(1 + t²), where t is the time in minutes. The true strain rate (in min^-1) at the end of one minute is _______

(0.9 to 1.1) is the correct answer.

Ques 38 GATE 2014 Set-1

Given that the determinant of the matrix is 12, the determinant of the matrix is