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Home » Engineering » Chemical Engineering » Aptitude Test - 6
1.On a summer day, a scooter rider feels more comfortable while on the move than while at a stop light because?
A. Air is transparent to radiation and hence it is cooler than the body
B. More heat is loss by convection and radiation while in motion
C. Air has a low specific heat and hence it is cooler
D. Air is transparent to radiation and hence it is cooler than the body
2.What is the value of convective coefficient of oil in case of forced convection?
A. 160-3000 W/m2 K
B. 60-3000 W/m2 K
C. 460-3000 W/m2 K
D. 160-3000 W/m2 K
3.Which quantity signifies the ratio of temperature gradient at the surface to a reference temperature gradient?
A. Stanton number
B. Fourier number
C. Nusselt number
D. Stanton number
4.Nusselt number is given by?
A. 4 h l/k
B. 3 h l/k
C. 2 h l/k
D. 4 h l/k
5.The temperature profile at a particular location in a thermal boundary layer is prescribed by n expression of the form
A. 4 B k/ (t s – t infinity)
B. 3 B k/ (t s – t infinity)
C. 2 B k/ (t s – t infinity)
D. 4 B k/ (t s – t infinity)
6.Consider the above problem, calculate the temperature gradient at the surface?
A. – 14636 degree Celsius/m
B. – 24636 degree Celsius/m
C. – 34636 degree Celsius/m
D. – 14636 degree Celsius/m
7.At the interface of solid body, heat flows by conduction and is given by?
A. h A
B. h (t s – t infinity)
C. h A (t s – t infinity)
D. h A
8.For a given value of Nusselt number, the convective surface coefficient h is directly proportional to?
A. Density
B. Thermal conductivity
C. Mass
D. Density
9.What is the dimension of heat?
A. M L T -2
B. M L 2 T -1
C. M L T 2
D. M L T -2
10.What is the dimension of dynamic viscosity?
A. M L -1 T -2
B. M L -2 T -1
C. L -1 T -1
D. M L -1 T -2
11.What is the dimension of kinematic viscosity?
A. M L 2T -1
B. L 2T -1
C. L 2T -2
D. M L 2T -1
12.What is the dimension of energy?
A. M L T -2
B. M L 1 T -2
C. M L 2 T -1
D. M L T -2
13.What is the dimension of force?
A. M L T -2
B. M T -2
C. L T -2
D. M L T -2
14.What is the dimension of density?
A. M L -2
B. M T -3 L 2
C. M L -3
D. M L -2
15.What is the dimension of acceleration?
A. L T -2
B. M L T -1
C. L T -4
D. L T -2
16.What is the dimension of specific heat?
A. M L T -2 α -1
B. L T -2 α -1
C. M L T -1 α -1
D. M L T -2 α -1
17.What is the dimension of thermal conductivity?
A. M L T -3 α -2
B. M L T -2 α -1
C. M L T -3
D. M L T -3 α -2
18.What is the dimension of gravity?
A. L T -4
B. M L T -1
C. L T -2
D. L T -4
19.How is dimensional homogeneity related with fundamental units of measurements?
A. Twice
B. Dependent but can vary
C. Dependent
D. Twice
20.What is the time period of oscillation of a simple pendulum of length L and mass m?
A. 2 π (L/g) 1/2
B. 2 π (L/g) 2
C. 2 π (L/g)
D. 2 π (L/g) 1/2
21.The equation of friction loss in a pipe of length l and diameter d through which fluid flows with velocity v is?
A. h i = 4 f V 2/d 4 g
B. h i = 4 f V 2/ 2 g
C. h i = 4 f V 2/d 2 g
D. h i = 4 f V 2/d 4 g
22.Bernoulli’s equation for fluid flow along a stream line is given as?
A. p/w + V 2/2 g + y = constant
B. p/w + V 2/2 g + y = 1
C. p/w + V/2 g + y = constant
D. p/w + V 2/2 g + y = constant
23.The convective film coefficient in k cal/m2 hr degree can be converted to J/m2 s degree by multiplying it with a factor?
A. 1.1327
B. 1.1427
C. 1.1527
D. 1.1327
24.The pressure in kg/cm2 can be converted to N/m2 by multiplying it with a factor?
A. 9.807 * 10 5
B. 9.807 * 10 4
C. 9.807 * 10 3
D. 9.807 * 10 5
25.How many Newton’s are there in one kg?
A. 9.807
B. 9.707
C. 9.607
D. 9.807
26.How many Joule are there in 1 k cal?
A. 6186
B. 5186
C. 4186
D. 6186
27.How many fundamental quantities are there?
A. 1
B. 2
C. 3
D. 1
28.What is the dimension of coefficient of volumetric expansion?
A. α -1
B. α -2
C. α 1
D. α -1
29.What is the dimension of convective film coefficient?
A. M T -1 α -1
B. M T -2 α -1
C. M T -3 α -2
D. M T -1 α -1
30.What is the dimension of velocity?
A. L T
B. L T -1
C. L T -3
D. L T
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