Join Us ::

Menu Home Classes GK Engineering Past Papers Current Affairs Technical GAT Subject Programming Medical Papers

Engineering :: All Aptitude Test ::

Home » Engineering » Aptitude Test - 76
Hassan
1.If the magnification produced by a lens has a negative value, the image will be
A. virtual and inverted
B. virtual and erect
C. real and erect
D. virtual and inverted
2.When the object is placed between f and 2f of a convex lens, the image formed is
A. at f
B. at 2f
C. beyond 2f
D. at f
3.Which mirroji can produce a virtual, erect and magnified ifhage of an object?
A. Concave mirror
B. Convex mirror
C. Plane mirror
D. Concave mirror
4.If the image is formed in front of the mirror, then the image distance will be
A. positive or negative depending on the size of the object
B. neither positive nor negative
C. positive
D. positive or negative depending on the size of the object
5. Focal length of plane mirror is
A. At infinity
B. Zero
C. Negative
D. At infinity
6.Image formed by plane mirror is
A. Real and erect
B. Real and inverted
C. Virtual and erect
D. Real and erect
7.A concave mirror gives real, inverted and same size image if the object is placed
A. At F
B. At infinity
C. At C
D. At F
8. A concave mirror gives virtual, refract and enlarged image of the object but image of smaller size than the size of the object is
A. At infinity
B. Between F and C
C. Between P and F
D. At infinity
9.We can see objects because of_______
A. reflection
B. refraction
C. transmission
D. reflection
10.Convex lens focus a real, point sized image at focus, the object is placed
A. At focus
B. Between F and 2F
C. At infinity
D. At focus
11.8 The unit of power of lens is
A. Metre
B. Centimeter
C. Diopter
D. Metre
12.The refractive index of a rarer medium with respect to a denser medium is...
A. 1
B. Greater Than 1
C. Smaller Than 1
D. 1
13.The radius of curvature of a mirror is 20cm the focal length is
A. 20cm
B. 10cm
C. 40cm
D. 20cm
14.Molar absorbtivities of compounds exhibiting charge transfer absorption are
A. small
B. moderate
C. large
D. small
15.Molar absorbtivity is the measure of the
A. amount of light absorbed per unit length
B. amount of light absorbed per unit concentration
C. amount of light reflected and absorbed per unit concentration
D. amount of light absorbed per unit length
16.Which of the following relationships between absorbance and %transmittance is incorrect?
A. A = log10 1 / T
B. A = 2 - log10 %T
C. A = log10 1 / T
D. A = log10 1 / T
17.Why is it generally preferable to use absorbance as a measure of absorption rather than % transmittance?
A. Because %T cannot be measured as accurately as absorbance
B. Because %T is dependant on the power of the incident radiation
C. Because absorbance is proportional to the concentration of the analyte, whereas %T is not
D. Because %T cannot be measured as accurately as absorbance
18.In the past, IR spectra had to be aquired one wavelength at a time, which took a long time. Today quick spectra is due to the
A. the Fourier Transfer Algorithm allows us to scan all frequencies at once
B. light is faster today that it used to be
C. absence of broad spectrum of wavelenth
D. the Fourier Transfer Algorithm allows us to scan all frequencies at once
19.Which of the following will oscillate the fastest?
A. A large mass on a weak spring
B. A large mass on a stiff spring
C. A small mass on a stiff spring
D. A large mass on a weak spring
20.In the equation, A = ε bc, what quantity is represented by "ε"?
A. Absorbtivity
B. Molar absorbtivity
C. Path length
D. Absorbtivity
21.Why must the voltage supplied to a tungsten lamp be very stable?
A. Because if it wasn't, the lamp would bum out
B. Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage
C. Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage
D. Because if it wasn't, the lamp would bum out
22.Where does a carbonyl (C=0) stretch appear in an IR spectrum?
A. 1740-1720
B. 1870-1650
C. 3640-3250
D. 1740-1720
23.Which of the following components of a monochromator is the dispersing element?
A. The collimating lens
B. The entrance slit
C. The diffraction grating
D. The collimating lens
24.A simple harmonic oscillator may absorb energy
A. at anytime.
B. when the frequencies match exactly
C. when the amplitudes are the same.
D. at anytime.
25.UV-Vis spectroscopy of organic compounds is usually concerned with which electronic transition(s)?
A. σ → σ*
B. n → σ*
C. n → π* and π → π*
D. σ → σ*
26.Vibrational spectroscopy is
A. a large mass on a weak spring
B. a flashlight through a prism and shake it
C. a class of spectroscopic techniques which analyzes molecular motions
D. a large mass on a weak spring
27.Why are rotational transitions of little use to a spectroscopist?
A. Because the energy required to induce a rotational transition is so small that it cannot be measured
B. Because rotational transitions are extremely rare
C. Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions
D. Because the energy required to induce a rotational transition is so small that it cannot be measured
28.Beer's Law states that
A. absorbance is proportional to both the path length and concentration of the absorbing species
B. absorbance is proportional to the log of the concentration of the absorbing species
C. absorbance is equal to P0 / P
D. absorbance is proportional to both the path length and concentration of the absorbing species
29.The capacity to do work is called:
A. Heat
B. Energy
C. work
D. Heat
30.The thermal diffusivities for solids are generally
A. Less than those for gases
B. Less than those for liquids
C. More than those for liquids and gases
D. Less than those for gases
Related Subjects

Date to Date Current Affairs 2022

PakMCQs.net

Quick Links

GAT Subject



   Computer Science    English Mcqs    Agriculture    

Engineering



   Computer Science    Civil Engineering    

Technical



   Networking    Electronics    Database    

Past Papers



   Model Papers    FPSC Papers    
Our Team | Career | Contact | JoinUs | Privacy Policy | DMC

© 2020-2024 by Pak-MCQs.net All Rights Reserved.

Email: [email protected]