# ETEA Per Engineering Papers

1

Q: What is the atomic number of an element that has four unpaired electrons in its ground state?

(a) :  6
(b) :  14
(c) :  22
(d) :  26
(e) :  None

Explanation:

Q: The moment arm of a force of 0.6 N to produce maximum torue of 0.48Nm is

(a) :  2.88m
(b) :  …..
(c) :  0.8m
(d) :  0.288 m
(e) :  None

Explanation:

Q: The temp at which the resistance of conductor approaches to zero is called

(a) :  Curie temperture
(b) :  Critical tmep.
(c) :  Absolute temp.
(d) :  Normal temp.
(e) :  None

Explanation:

Q: Ethanl is isomeric with

(a) :  ethanal
(b) :  Di-ethyl-ehter
(c) :  dimethyl ether
(d) :  propannone
(e) :  None

Explanation:

Q: Sarwar ----------- collect antiques but now he has other pastimes

(a) :  used to
(b) :  was used to
(c) :  used to be
(d) :  using to
(e) :  None

Explanation:

Q: Sum of the cube roots of unity is 0

(a) :  sum of the cube roots of unity is 0
(b) :  product of the cube roots of unity is 1
(c) :  Each complex cube root of unity is reciprocal of the other
(d) :  All of the above
(e) :  None

Explanation:

Q: If A.B = 0 then A xB will be equal to

(a) :  Abn
(b) :  Absinɵ
(c) :  AB cosɵ
(d) :  None

Explanation:

Q: IF a,b,c are the lengths of the sides of a triangle and α,β,γ are its included angles the b²+c²+a²/2bc=

(a) :  Sinα
(b) :  cosα
(c) :  Cos β
(d) :  Cos γ
(e) :  None

Explanation:

Q: Bezene and toluene form nearly ideal solution. The V.P f pure toluene is 22 torr at 20⁰ C for equimolar mixture of benezene and toluene at 20⁰ C the V.P of toluene is

(a) :  5.5 torr
(b) :  11.0 torr
(c) :  22 torr
(d) :  1.1 torr
(e) :  None