Exams Questions and Answers

Q:

If (1/x) + (1/y) + (1/z) = 0 and x + y + z = 9, then what is the value of $x^{3} + y^{3} + z^{3} - 3 xyz$ ?

A) 81	B) 361
C) 729	D) 6561

Answer & Explanation Answer: C) 729

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

For photoelectric effect to take place, the metal used as the cathode should have_________

A) high melting point	B) low melting point
C) Low work function	D) low resistance

Answer & Explanation Answer: C) Low work function

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

What is the simplified value of (1– sin A cos A)(sin A + cos A)?

A) sin2A – cos2A	B) sin3A + cos3A
C) 0	D) 1

Answer & Explanation Answer: B) sin3A + cos3A

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?

A) lUV < lIR < lVIS	B) lUV > lVIS > lIR
C) lUV > lIR > lVIS	D) lUV < lVIS < lIR

Answer & Explanation Answer: D) lUV < lVIS < lIR

Explanation:

Infrared radiation, what we experience as heat when we hold our hand near a warm object, is somewhat longer wavelengths than visible light. Visible light is simply electromagnetic radiation in a range of wavelengths that our eyes are sensitive to. Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light. Ultraviolet is shorter wavelengths than violet.

Longer the wavelength,lower the energy

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

Profit of Rs 12,400 has to be divided between three partners A, B and C in the ratio 5:7:8. How much does B get (in Rs)?

A) 4340	B) 3440
C) 3340	D) 4430

Answer & Explanation Answer: A) 4340

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

RS, WX, ? , GH

A) BC	B) AB
C) CD	D) EG

Answer & Explanation Answer: A) BC

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Filed Under: Alphabet Test
Exam Prep: Bank Exams

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Q:

A computer always has a

A) Mouse	B) Keyboard
C) CPU	D) Graphics card

Answer & Explanation Answer: C) CPU

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Filed Under: Computer
Exam Prep: Bank Exams

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Q:

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

A) 10	B) 11
C) 8	D) 9

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