Hello Friends,
Preparing for GATE exams 2018 or TRP Govt Polytechnic Exams or IES examinations or whatever other Govt exams for Mechanical Engineering? Then this is the post where you lot tin transcend previous years GATE exam questions which are solved. Here is a query newspaper from GATE 1998 yr for Mechanical Engineering. You tin lift the questions as well as answers provided hither for your time to come exams.
1. Influenza A virus subtype H5N1 car moving amongst uniform acceleration covers 450 1000 inward a five 2d interval, as well as covers 700 1000 inward the adjacent five 2d interval. The acceleration of the car is:
(a) vii m/s^2
(b) l m/s^2
(c) 25 m/s^2
(d) ten m/s^2
Preparing for GATE exams 2018 or TRP Govt Polytechnic Exams or IES examinations or whatever other Govt exams for Mechanical Engineering? Then this is the post where you lot tin transcend previous years GATE exam questions which are solved. Here is a query newspaper from GATE 1998 yr for Mechanical Engineering. You tin lift the questions as well as answers provided hither for your time to come exams.
1. Influenza A virus subtype H5N1 car moving amongst uniform acceleration covers 450 1000 inward a five 2d interval, as well as covers 700 1000 inward the adjacent five 2d interval. The acceleration of the car is:
(a) vii m/s^2
(b) l m/s^2
(c) 25 m/s^2
(d) ten m/s^2
Answer: (d) ten m/s^2
Explanation:
u = initial velocity
v = terminal velocity
a = acceleration
t = time
s = distance
using the relation s = ut + 1/2 at^2 as well as v=u + at, for the outset five 2d interval, nosotros have,
450 = 5u + 25/2 a ...... (i)
v = u + 5a
For the adjacent five 2d interval (v=u + 5a) volition endure the initial velocity, then
700 = (u + 5a) five + 25/2 a
700 = 5u + 25a + 25/2 a ..... (ii)
From equations (i) as well as (ii), nosotros get
700-450 = (5u +25a + 25/2 a) – (5u + 25/2 a)
250 = 25a
a = 250/25
a =10 m/s^2
2. The buckling charge for a column pinned at both ends is ten kN. If the ends are fixed, the buckling charge changes to
(a) forty kN (b) 2.5 kN (c) five kN (d) twenty k N
Answer: (a) forty kN
3. The normal stresses at a signal are σ x = ten MPa and, ii MPa; σ y = the shear stress at this signal is iv MPa. The maximum primary stress at this signal is:
(a) xvi MPa (b) fourteen MPa (c) eleven MPa (d) ten MPa
Answer: (c) eleven MPa
Explanation: Using the formula given below, detect out σmax which is the maximum primary stress.
4. The ratio of average shear stress to the maximum shear stress inward a beam amongst a foursquare cross-section is:
(a) i (b) 2/3 (c) 3/2 (d) 2
Answer: (b) 2/3