Mechanical Engineering Quiz 38
1 / 50
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?
2 / 50
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?
3 / 50
Freon group of refrigerants are___________________?
4 / 50
Isotopes of same elements have___________________?
5 / 50
All radiations in a black body are___________________?
6 / 50
Free cutting steels_____________________?
7 / 50
Isothermal compression effeicency can be attained by running the compressor__________________?
8 / 50
Phenomenon of choking in compressor means __________________?
9 / 50
Air refrigeration cycle is used in ____________________?
10 / 50
When a body floating in a liquid, is displaced slightly, it oscillates about _________________?
11 / 50
Frederick W. Taylor introduced a system of working known as________________?
12 / 50
Poise is the unit of________________?
13 / 50
The crown of the fire box is made hemispherical in order to___________________?
14 / 50
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
15 / 50
Calorie is a measure of
16 / 50
Which of the following laws is applicable for the behavior of a perfect gas__________________?
17 / 50
The value of Poisson?s ratio for cast iron is_________________?
18 / 50
Chilled cast iron has____________________?
19 / 50
For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?
20 / 50
Relationship between the number of links (L) and number of pairs (P) is___________________?
21 / 50
The number of electrons in 1 cm3 of metal would be of the order of_______________?
22 / 50
Which of the following cycles is not a reversible cycle_____________________?
23 / 50
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is_________________?
24 / 50
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?
25 / 50
The flow in which each liquid particle has a definite path and their paths do not cross each other is called__________________?
26 / 50
The moment on the pulley which produces rotation is called ___________________?
27 / 50
The center of gravity of a triangle lies at the point of __________________?
28 / 50
Steam in water tube boiler as compared to fire tube boiler_________________?
29 / 50
The effective power of gas turbines is increased by adding the following in compressor__________________?
30 / 50
The impact strength of a material is an index of its ___________________?
31 / 50
Which of the following pipe joints would be suitable for pipes carrying steam_____________?
32 / 50
The first unclear power plant in India is located at____________________?
33 / 50
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to___________________?
34 / 50
The lenght of Cornish boiler is of the order of _________________?
35 / 50
The bulk modulus of elasticity with increase in pressure__________________?
36 / 50
In queuing theory, the nature of the waiting situation can be studied and analysed mathematically if_________________?
37 / 50
The probability distribution of activity times in PERT follows following distribution__________________?
38 / 50
Reheating of steam under ideal conditions takes place at constant __________________?
39 / 50
Fuel oil consumption guarantees for I C engine are usually based on__________________?
40 / 50
Choose the wrong statement ?
41 / 50
Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?
42 / 50
Film coefficient is defined as Inside diameter of tube________________?
43 / 50
Which of the following has least value of conductivity_________________?
44 / 50
Which of the following mechanisms produces mathematically an exact straight line motion____________________?
45 / 50
Leakage past the piston rings and valve seats in I.C engines with increase in speed_______________?
46 / 50
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?
47 / 50
The reason for supercharging in any engine is to________________?
48 / 50
If n = number of members andy = number of joints, then for a perfect frame, n =_________________?
49 / 50
Short horizontal lines on pressure-enthalpy chart show__________________?
50 / 50
Which one of the following represents a group incentive plan ?
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