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Home » Engineering » Computer Science » Aptitude Test - 36
1. Which of the following variable wait within the to enable a process
A. a condition is defined by a condition variable
B. objects Boolean objects can be used by condition variables
C. semaphore must be used
D. a condition is defined by a condition variable
2.In which the access takes place when different processes try to access the same data concurrently and the outcome of the execution depends on the specific order, is called
A. dynamic condition
B. race condition
C. essential condition
D. dynamic condition
3.Which of the following option is suitable when a process is executing in its critical section, then no other processes can be executing in their critical section
A. mutual exclusion
B. critical exclusion
C. synchronous exclusion
D. mutual exclusion
4.Synchronization tool is?
A. thread
B. pipe
C. semaphore
D. thread
5.A semaphore is a shared integer variable that can not
A. drop below zero
B. be more than zero
C. drop below one
D. drop below zero
6.Which of the following for Mutual exclusion can be provided by the
A. mutex locks
B. binary semaphores
C. both mutex locks and binary semaphores
D. mutex locks
7.When high priority task is indirectly preempted by medium priority the scenario is called
A. priority inversion
B. priority removal
C. priority exchange
D. priority inversion
8.Process synchronization can be done on which of the following levels
A. hardware
B. software
C. both hardware and software
D. hardware
9.A bolometer is __________________?
A. An element which senses optical input and delivers thermal output
B. Used for the measurement of thermal radiation
C. Both A. & B.
D. An element which senses optical input and delivers thermal output
10.The time constant of a first order process with resistance R and capacitance C is__________________?
A. R – C
B. R + C
C. RC
D. R – C
11.Very low pressure is expressed in microns (μ), which is equal to ____________ mm of Hg column (absolute) at 0°C?
A. 0.01
B. 0.001
C. 0.0001
D. 0.01
12.What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2
A. H/(1 + GH)
B. G/(1 + GH)
C. 1/(1 + GH)
D. H/(1 + GH)
13.Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?
A. Increase of thermal conductivity
B. Increase of pressure
C. Increase of pressure
D. Increase of thermal conductivity
14.Change of angle of refraction with composition comprises the working principle of a___________________?
A. Polarograph
B. Polarimeter
C. Spectrometer
D. Polarograph
15.Mcleod gauge is used to measure the __________________?
A. Flow rate
B. Point velocity
C. Vacuum
D. Flow rate
16.A non-linear system will have _____________ steady state values?
A. Two
B. More than one
C. One
D. Two
17.On-off control which is a special case of proportional control, has a band width of about _____________ percent?
A. 75
B. 100
C. 25
D. 75
18.In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is_____________?
A. G/H
B. H/(1 + G)
C. G/(1 + H)
D. G/H
19.Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C?
A. < 0
B. 0-100
C. > 100
D. < 0
20.Mercury thermometer can be used to measure the temperature upto ____________ °C?
A. 250
B. 100
C. 350
D. 250
21.The Laplace transform of exp(at), where a > 0, is defined only for the Laplace parameter, s > a since______________?
A. The function exp(at) is piece-wise continuous only for s > a
B. The Laplace transform of integral of exp(at) has finite values only for s > a
C. The Laplace transform integral of exp(at) has initial values only for s > a
D. The function exp(at) is piece-wise continuous only for s > a
22.Temperature of _____________ cannot be measured by an optical or radiation pyrometer?
A. Hot blast (air) from stoves
B. Combustion space in boilers
C. Molten slag flowing out of blast furnace
D. Hot blast (air) from stoves
23.Platinum resistance thermometer can be used upto antimony point which is ____________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure
A. 1064.43
B. 630.74
C. 961.93
D. 1064.43
24.Which of the following thermocouples has the least temperature measurement range ?
A. Copper-constantan
B. Iron-constantan
C. Platinum-platinum/rhodium
D. Copper-constantan
25.Radiation thermometer cannot measure the temperature ___________________?
A. Of an object without coming in contact with it
B. Inside a pressure vessel
C. Of liquid oxygen
D. Of an object without coming in contact with it
26.The transfer function for an ideal proportional plus reset controller (reset time T) is_______________?
A. Kc[1 + (1/TS)]
B. Kc/(1 + TS)
C. Kc(1 + TS)
D. Kc[1 + (1/TS)]
27.A pyranometer is an instrument used for measuring the___________________?
A. Bright sunshine period
B. Global radiation
C. Beam radiation
D. Bright sunshine period
28.A Process Control Block(PCB) does not contain which of the following :
A. code
B. stack
C. Process State
D. code
29. The number of processes completed per unit time is known as __________
A. output
B. Throughput
C. Efficiency
D. output
30.The Process Control Block is :
A. Process type variable
B. Data Structure
C. a secondary storage section
D. Process type variable
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