Model Questions for SSC Junior Engineer EXAM - Mechanical Engg Set-4

1. The unit of dynamic viscosity in S.I. units is

A. N-m/s2
B. stoke
C. N-s/m2
D. poise

2. In a depressed nappe

A. the pressure below the nappe is negative
B. the pressure above the nappe is atmospheric
C. the pressure below the nappe is atmospheric
D. the pressure above the nappe is negative

3. The kinematic viscosity is the

A. product of absolute viscosity and density of the liquid
B. ratio of density of the liquid to the absolute viscosity
C. product of absolute viscosity and mass of the liquid
D. ratio of absolute viscosity to the density of the liquid

4. Reynold's number is the ratio of inertia force to

A. viscous force
B. elastic force
C. gravity force
D. pressure force

5. A flow in which __________ force is dominating over the viscosity is called turbulent flow.

A. viscous
B. elastic
C. inertia
D. surface tensio

Study Kit for SSC Junior Engineer EXAM (Paper-1) 2017-2018

6. The value of bulk modulus of a fluid is required to determine

A. Mach number
B. Euler's number
C. Froude's number
D. Reynold's number

7. In one dimensional flow, the flow

A. takes place in curve
B. is steady and uniform
C. takes place in one direction
D. takes place in straight line

8. The velocity corresponding to Reynold number of 2800, is called

A. higher critical velocity
B. lower critical velocity
C. sub-sonic velocity
D. super-sonic velocity

9. The atmospheric pressure at sea level is

A. 10.3 m of water
B. 103 kN/m2
C. 760 mm of mercury
D. all of these

Study Kit for SSC Junior Engineer EXAM (Paper-1) 2017-2018

Answer

1. (C) 2. (A) 3. (D) 4. (A) 5. (C) 6. (A) 7. (D) 8. (A) 9. (D)