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Mechanical Engineering Quiz 18

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Mechanical Engineering Quiz 18

1 / 50

The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as ________________?

2 / 50

According to first law of thermodynamics_______________________?

3 / 50

If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella___________________?

4 / 50

Vacuum for reciprocating steam engines compared to steam turbines is__________________?

5 / 50

The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?

6 / 50

The maximum number of jets generally employed in impulse turbine without jet interference is________________?

7 / 50

Liquids_________________?

8 / 50

In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?

9 / 50

Air vessels in reciprocating pump are used to__________________?

10 / 50

Tensile strength of steel can be safely in-creased by________________?

11 / 50

Melting point of iron is__________________?

12 / 50

According to Kirchoff?s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a _________________?

13 / 50

Fuel consumption of diesef engines is not guaranteed at one quarter load because at such low loads________________?

14 / 50

The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?

15 / 50

What does symbol ?O? imply in work study________________?

16 / 50

Which one of the following metals would work-harden more quickly than the others__________________?

17 / 50

In the axial flow gas turbine, the work ratio is the ratio of____________________?

18 / 50

In hydrodynamic bearings_____________________?

19 / 50

Lancing is the operation of _________________?

20 / 50

The capillary rise at 20?C in a clean glass tube of 1 mm bore containing water is approximately____________________?

21 / 50

If three forces acting in different planes can be represented by a triangle, these will be in________________?

22 / 50

Residual stress in materials_________________?

23 / 50

Presence of moisture in fuel oil would____________________?

24 / 50

With increase in engine speed, the ignition of spark in petrol engine has to be __________________?

25 / 50

Turbo propeller has the following additional feature over the turbojet __________________?

26 / 50

Proximate analysis of fuel is determination of percentage of ____________________?

27 / 50

Supercharging is essential in_____________?

28 / 50

In boiling water reactor, moderator is__________________?

29 / 50

The pressure and temperature at the end of compression stroke in a petrol engine are of the order of___________________?

30 / 50

Work done in an adiabatic process between a given pair of end states depends on__________________?

31 / 50

The diameter of fire tubes in Cochran boiler is of the order of___________________?

32 / 50

Resistance to fatigue of a material is measured by________________?

33 / 50

Hydrogen is preferred as better coolant in comparison to C02 because former_____________________?

34 / 50

The atmospheric pressure with rise in altitude decreases__________________?

35 / 50

Zeroth law of thermodynamics________________?

36 / 50

Super conduction by metals is observed in the temperature range of_________________?

37 / 50

A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

38 / 50

Electron-volt is the unit of________________?

39 / 50

Young?s modulus is defined as the ratio of ___________________?

40 / 50

The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?

41 / 50

The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream__________________?

42 / 50

Water tube boilers are those in which________________?

43 / 50

Work done in a free expansion process is___________________?

44 / 50

Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows ________________?

45 / 50

The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to___________________?

46 / 50

The saturation temperature of steam with increase in pressure increases____________________?

47 / 50

The coal requirement per kW hour generation in the thermal power plant is of the order of__________________?

48 / 50

The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?

49 / 50

Secondary air is the used to_________________?

50 / 50

A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

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