MENSURATION & INSTRUMENTATION MCQS SET 04

MENSURATION & INSTRUMENTATION MCQS SET 04

1)   Due to overdamping, the instrument will become
a. Slow
b. Lethargic
c. Fast
d. Both (a) and (b)
ANSWER: Both (a) and (b)
 

2)   If the degree of damping of an instrument should be adjusted to a value which is sufficient to enable the pointer to rise quickly to its deflected position without overshooting is called as
a. Overdamped
b. Dead beat
c. Underdamped
d. None of these
ANSWER: Dead beat
 

3)   In a Wheatstone bridge, the formula for finding unknown resistance (R2) is given by
R2 = ( R2*R3 ) / R1
Where, R1 = 150O ± 0.1%, R2 = 250O ± 0.1%
R3 = 300O ± 0.1%
a. R2 = 250O ± 0.1%
b. R2 = 300O ± 0.3%
c. R2 = 750O ± 0.3%
d. R2 = 500O ± 0.3%
ANSWER: R2 = 500O ± 0.3%
 

4)   While measuring resistance by the voltmeter - ammeter method, the maximum possible percentage error in the voltmeter and ammeter are ± 1.8% and ± 1.2% respectively. Then the maximum possible percentage error in the value of resistance will be
a. ± 3%
b. ± 4%
c. ± 4.2%
d. ± 4.8%
ANSWER: ± 3%
 

5)   If the resistance in a circuit is given by 80 O ± 0.2% and the current flowing through it is 5A ± 0.1%, then the uncertainty in the power will be
a. ± 0.2 %
b. ± 0.4 %
c. ± 0.6 %
d. ± 0.8 %
ANSWER: ± 0.4 %
 

6)   If the two voltage measurements are V1 = 150 ± 2% and V2 = 100 ± 4% respectively. Then the maximum percentage error in the sum of two voltage measurements is
a. ± 2.4 %
b. ± 2.6 %
c. ± 2.8 %
d. ± 3.4 %
ANSWER: ± 2.8 %
 

7)   When a 100 V moving iron voltmeter is of accuracy class 1 - 0 is used in a circuit, it reads 50 V. Then the maximum possible percentage error in the reading is
a. 1 %
b. 2 %
c. 2.5 %
d. 3 %
ANSWER: 2 %
 

8)   In a measurement system,
a. A single measurement components may have both random errors and systematic errors
b. A measurement system consists of several components with each component having separate errors
c. Both the statement (a) & (b) are true
d. Neither statement (a) nor statement (b) is true
ANSWER: Both the statement (a) & (b) are true
 

9)   The error between mean of finite data set and mean of infinite data set is known as
a. True error of the mean
b. Standard error of the mean
c. Finite error
d. Infinite error
ANSWER: Standard error of the mean
 

10)   If the quantity to be measured remains constant during the process of taking the repeated measurements then the random errors can be eliminated by
a. Calculating the mean of the number of repeated measurements
b. Calculating the median of the number of repeated measurements
c. Calculating the sum of the numbers of repeated measurements
d. Either (a) or (b)
ANSWER: Either (a) or (b)