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# SSC-JE ME || Technical Quiz 16

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Question 1

The position vector of a particle in a circular motion about the origin sweeps out equal area in equal time. Its

Question 2

A Triclinic unit cell satisfies which of the following equations?

Question 3

What symbol is used to indicate surface roughness?

Question 4

For the two shafts connected in parallel ________.

Question 5

Determine the minimum diameter of glass tube that can be used to measure water level if the capillary rise in the tube is restricted to 2.5mm. Consider surface tension of water in contact with air as 0.073 N/m

Question 6

The correct expression of the Kutzback criterion for calculating degrees of freedom (n) of the mechanism is (where l = number of links, j = number of joints and h = number of higher pairs)

Question 7

In a furnace made of bricks

Inside heat transfer coefficient = 35 W/k

Outside heat transfer coefficient = 25 W/k

Thermal conductivity of bricks (15 cm thick) = 0.15 W/k
Find Overall Heat transfer coefficient

Question 8

Combustion in pulse jet________.

Question 9

The lengths of the links of a 4-bar linkage with revolute pairs only are A,B,C and D units.

Given that B < A < D < C and B+C < A+D . Link to be fixed, for getting a ‘double crank’ mechanism is?

Question 10

The coefficient of friction depends on

Question 11

Young’s modulus of elasticity is the ratio of

Question 12

The factor responsible for the formation of discontinuous chips is

Question 13

Which of the following is reason of irreversibility?

Question 14

Efficiency of Carnot engine is 50%. If the cycle direction is reverse, COP of the refrigerator working on reversed Carnot cycle will be _________.

Question 15

Trepanning operation is used for

Question 16

The radiative heat transfer rate per unit area (W/m2) between two plane parallel grey surfaces (emissivity 0.9) maintained at 400 K and 300 K is (Stefan Boltzman constant σ= 5.67× 10–8 W/m2K4) _________.

Question 17

A steel rod is heated from 25 to 250 . Its coefficient of thermal expansion is 10-5 /and E = 100 GN/m2. If the rod is free to expand, the thermal stress developed in it is

Question 18

The angular motion of a disc is given by θ = 4t2 + 3t. What will be the angular velocity (in rad./sec )at t=2 sec ?

Question 19

What is the dominant direction of the tool marks or scratches in a surface texture having a directional quality called?

Question 20

Coordination number of simple cubic unit cell is equal to _________.
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