Mechanical Engineering Quiz 38
1 / 50
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?
2 / 50
All radiations in a black body are___________________?
3 / 50
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to___________________?
4 / 50
The reason for supercharging in any engine is to________________?
5 / 50
Isotopes of same elements have___________________?
6 / 50
Poise is the unit of________________?
7 / 50
Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?
8 / 50
The bulk modulus of elasticity with increase in pressure__________________?
9 / 50
Steam in water tube boiler as compared to fire tube boiler_________________?
10 / 50
The flow in which each liquid particle has a definite path and their paths do not cross each other is called__________________?
11 / 50
The probability distribution of activity times in PERT follows following distribution__________________?
12 / 50
If n = number of members andy = number of joints, then for a perfect frame, n =_________________?
13 / 50
The first unclear power plant in India is located at____________________?
14 / 50
When a body floating in a liquid, is displaced slightly, it oscillates about _________________?
15 / 50
Isothermal compression effeicency can be attained by running the compressor__________________?
16 / 50
Choose the wrong statement ?
17 / 50
Film coefficient is defined as Inside diameter of tube________________?
18 / 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__________________?
19 / 50
Short horizontal lines on pressure-enthalpy chart show__________________?
20 / 50
Which of the following cycles is not a reversible cycle_____________________?
21 / 50
Chilled cast iron has____________________?
22 / 50
The effective power of gas turbines is increased by adding the following in compressor__________________?
23 / 50
Free cutting steels_____________________?
24 / 50
Leakage past the piston rings and valve seats in I.C engines with increase in speed_______________?
25 / 50
Fuel oil consumption guarantees for I C engine are usually based on__________________?
26 / 50
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?
27 / 50
Which of the following laws is applicable for the behavior of a perfect gas__________________?
28 / 50
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
29 / 50
Air refrigeration cycle is used in ____________________?
30 / 50
Frederick W. Taylor introduced a system of working known as________________?
31 / 50
Which of the following has least value of conductivity_________________?
32 / 50
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is_________________?
33 / 50
For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?
34 / 50
Which of the following pipe joints would be suitable for pipes carrying steam_____________?
35 / 50
The center of gravity of a triangle lies at the point of __________________?
36 / 50
In queuing theory, the nature of the waiting situation can be studied and analysed mathematically if_________________?
37 / 50
Phenomenon of choking in compressor means __________________?
38 / 50
Calorie is a measure of
39 / 50
The number of electrons in 1 cm3 of metal would be of the order of_______________?
40 / 50
Reheating of steam under ideal conditions takes place at constant __________________?
41 / 50
Which one of the following represents a group incentive plan ?
42 / 50
The moment on the pulley which produces rotation is called ___________________?
43 / 50
Relationship between the number of links (L) and number of pairs (P) is___________________?
44 / 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_________________?
45 / 50
The crown of the fire box is made hemispherical in order to___________________?
46 / 50
The lenght of Cornish boiler is of the order of _________________?
47 / 50
The impact strength of a material is an index of its ___________________?
48 / 50
Freon group of refrigerants are___________________?
49 / 50
The value of Poisson?s ratio for cast iron is_________________?
50 / 50
Which of the following mechanisms produces mathematically an exact straight line motion____________________?
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